State Administration of Work Safety announced Wenzhou Train accident investigation report (full text)

by admin · December 28, 2011

BEIJING, Dec. 28 – State Administration of Work Safety Web site this evening announced the “7 ? 23″ Yongwen particularly important railway line accident investigation report. Reads as follows:

“7 ? 23″ Yongwen particularly important railway line accident investigation report

State “7 ? 23″ line particularly significant Yongwen Railway accident investigation team

December 25, 2011

directory

a , Basic 3

(a) the accident line of 3

(2) accident and the driver of the train 4

(d) of the accident area meteorological conditions 6

(five) lots accident law and order situation 7

(f) accident-related units of 7

(seven) LKD2-T1-based train control center equipment, research and development, on the road conditions 11

Second, the accident occurred after 13

Third, the emergency disposal 19

Fourth, the cause of the accident and the nature of 29

(a) the cause of the accident 29

(b) the nature of the accident 30

five persons responsible for the accident and the responsible units treatment recommendations 38

(a) the proposed accountability from staff 38

(b) The proposed granting party and government discipline staff 38

(d) proposed LKD2-T1-based train control center equipment units will be developed to rectify 56

(five ) of the proposed units and personnel-related administrative penalties 57

six, accident prevention and corrective measures recommended 57

(a) further implement the scientific concept of development , firmly establish the people-oriented, safe development of the concept 57

(b) strengthen the high-speed rail equipment manufacturing R & D Management 58

(d) high-speed rail technology and equipment to effectively strengthen the R & D Management 61

(e) high-speed rail technology and equipment to effectively strict security access and 62

(f) effectively strengthen the high-speed rail transportation safety management and employee education and training 63

(g) strengthen railway safety and emergency management 65

(h) strengthen high iron layout and overall development of 66

“7 ? 23″ Yongwen line railway accident investigation report particularly important

2011 年 7 月 23 日20:30:05, Ningbo, Wenzhou City in Zhejiang Province, isotherms, bound by the Beijing South Railway Station D301, Fuzhou and Hangzhou train station bound for South Fuzhou Train Station D3115 occurred EMU train rear-end accidents, resulting in 40 people were killed and 172 injured, interrupted traffic 32 hours 35 minutes, the direct economic loss of 193.7165 million yuan.

after the accident, the State Council attached great importance to President Hu Jintao, Premier Wen Jiabao and other central leaders were given important instructions, requiring sure to save first, go all out to organize rescue work, and identify the cause of the accident as soon as possible, and so do a good job dealing with the aftermath. By General Secretary Hu Jintao, Premier Wen Jiabao appointed Vice Premier Zhang on the morning of July 24, the rate relevant person in charge of emergency went to the scene to guide rescue, casualty treatment, rehabilitation treatment and accident investigation, a comprehensive deployment of related work , emphasize that we must resolutely follow the General Secretary Hu Jintao, Premier Wen Jiabao’s important instructions required to save the first place, go all out to organize the rescue work; to the serious, realistic, scientific and precise manner, in full swing accident investigations into the cause of the accident, summary of lessons from the accident, according to the law severely dealt with responsible personnel. July 28, Premier Wen Jiabao’s visit Wenzhou City, Zhejiang Province, to view the scene, memory of the victims, greetings families of the victims and the injured, to answer questions from Chinese and foreign correspondents, the investigation of the accident put forward specific demands, stressed the need to live by inspection, technical evaluation, investigation and evidence collection, a comprehensive analysis and expert appraisal, etc., to arrive at a realistic conclusion can stand the test of history. July 27 and August 10, Premier Wen Jiabao chaired a State Council successively 165, 167 executive meeting, thematic studies and railway accident investigation and handling safety, accident investigation and further explicit request, stressed the need to follow scientific , rigorous, according to the law and the principle of seeking truth from facts, not only to identify the direct cause, but also traced, find out the design, manufacturing, management, and the source of the problem, in accordance with laws and regulations, held directly responsible and serious about leadership, and to accept their supervision and social supervision, to the people an honest, responsible explanation.

by central leaders of the important instructions and the “production safety accident reporting and investigation of Treatment” (State Council Decree No. 493) and other relevant laws and regulations, July 25, the State Council approved the establishment of the State Council. ” 7 ? 23 “particularly major rail line Wen Yong accident investigation team (hereinafter referred to as the accident investigation team); August 10, according to the needs of the investigation, the State Council executive meeting decided on the 167 accident investigation team to enrich and strengthen. Accident investigation team by the State Administration of Work Safety head of the Secretary, the State Administration of Work Safety, Ministry of Supervision, Ministry of Industry and Information Technology, State Electricity Regulatory Commission, the National Federation of Trade Unions, Zhejiang Provincial People’s Government is responsible for each one and three comrades served as state departments (units) or the main person in charge of local government and are familiar with the work of the old railway deputy head of the comrades. Accident investigation team consists of technical groups, management groups, integrated group. At the same time, employing 12 rail transport, power, electrical, automation, communications, signals, safety management, construction and other professional experts in the fields Group (including representatives of two NPC, CPPCC National Committee members one, “House” Academy 2). Invited to send representatives to attend the Supreme People’s Procuratorate, the accident investigation.

accident investigation team through rigorous science, according to the law, practical, thorough and detailed site investigation, inspection and testing, technical evaluation, investigation and evidence collection, a comprehensive analysis and expert appraisal, identified after the accident, causes, emergency response, casualties and direct economic losses, and identify the nature and responsibilities of the accident, made the responsibility of the responsible personnel and units of the treatment recommendations and accident prevention and corrective measures. Now the situation as follows:

First, the basic situation

(a) line of the accident.

isotherms north of Ningbo, Ningbo, Zhejiang, south of Wenzhou City, a total length of 282.38 km, for two electric railway (railway from the coast of Zhejiang Co., Ltd. is responsible for construction, operation and management by the Shanghai Railway Bureau). March 10, 2005, the National Development and Reform Commission approved the Ningbo-Wenzhou Railway feasibility study, which target speed of passenger trains 200 km/h; August 2005, approved the preliminary design of Zhejiang Province and the Ministry of Railways, in which the speed of passenger trains target value of 200 km/h, set aside to further speed conditions; November 2008, the Ministry of Railways Identification Center issued a “Yong Wen, Wen-Fu and other operating speed of 250km/h passenger rail line to the hair line and issues such as seamless reply “, will open to run faster to 250 km/hour. The railway on February 28, 2006 construction, September 28, 2009 put into use, the more approved four months ahead of schedule.

accident site is located in Ningbo Yongjia isotherms between Station to South Station, Wenzhou 583 km 831 meters downstream line at (Oujiang large bridge). 5.8 ‰ of the downhill section, curve radius of 4,500 meters, high 110 mm, cross-CWR, 60 kg/m rail, Ⅲ type of concrete sleepers. Deck height of 17.4 m from the ground. After the accident, lots of accidents before and after passing the line inspection measurements.

(2) accident and the driver of the train.

1.D3115 train and the driver. D3115 model train CRH1-046B, grouping 16, total length of 426.3 m; attachment of the Shanghai Railway Bureau Shanghai motor car passenger car segment, from Fuzhou, Hangzhou Station bound for South Station. Capacity 1299 people train, take the passengers when the accident occurred 1072 people. At 23:04 on July 22 to at 1:30 on the 23rd in Hangzhou, the use of the motor car for database maintenance operations, the technical parameters and condition of the vehicle were normal.

D3115 train drivers how stable, Fuzhou, Nanchang Railway Bureau locomotive depot workers, bear D3115 times Fuzhou, Ningbo East Railway Station to South Station take the value of the task. February 25, 2010 examination by the Ministry of Railways train driver’s license to obtain motor car. On the front of the vehicle required to be carried out by a break, attendance procedures for qualified, qualified alcohol testing. The survey found that drivers in Yongjia, Wenzhou South Station to comply with the relevant operating between stations operating standards.

2.D301 train and the driver. D301 Train model CRH2-139E, grouping 16, total length of 401.4 m; attachment of the Beijing Railway Bureau, Beijing motor car passenger segment, since the Beijing South Railway Station bound for Fuzhou. Capacity 810 people train, take the passengers when the accident occurred 558. At 0:20 on July 23 to 2:10 at the Beijing South Train for the use of the database maintenance operations, the technical parameters and condition of the vehicle were normal.

D301 train driver Pan Yiheng, Fuzhou, Nanchang Railway Bureau locomotive depot workers, take D301 sub-station of Fuzhou, Ningbo East Railway Station to take the value of the task, has been killed in the accident. June 23, 2009 examination made by the Ministry of Railways EMU train driver’s license. On the front of the vehicle required to be carried out by a break, attendance procedures for qualified, qualified alcohol testing. The survey found that drivers in Yongjia, Wenzhou South Station to comply with the relevant operating between stations operating standards.

1. Chinese Train Control System (CTCS). Station train control center, track circuits, train protection systems, form the CTCS. CTCS according to functional requirements and configuration of applications are ranked from 0 to 4 (where CTCS-2 级 used 200 to 250 km/h speed and high-speed railway lines, lines that use the Yongwen level system). CTCS-2 fractions of two subsystems, namely, the ground subsystem and vehicle subsystems. Subsystem from the ground station control center column, the track circuit equipment. Vehicle subsystem consists of train protection systems and other equipment.

2. Wenzhou South Station train control center equipment. Wenzhou South Station using the train control center equipment product model LKD2-T1, the whole way communication signals from the Beijing Research and Design Institute Co., Ltd. R & D, Shanghai Railway Communication Co., Ltd., a track circuit code, range of signal lighting control, to determine the driving licensing and other functions.

3. Yongwen line track circuit. Ningbo isotherms using no insulation ZPW-2000A train track circuit occupancy, and integrity checks, and for sending traffic to train licensing information. Label for the 5829G in the accident on the track, the track length of 1500 meters, 5829G, and 5829AG 5829BG track circuit is divided into two sections. Test determined the accident investigation team, led by lightning Wenzhou South Station track circuit 4 sends boxes (5829AG equipment, 5808AG Lord, 5808AG equipment, S1LQBG equipment), two receiver box (5845AG, S1LQG), 1 个 attenuator (S1LQG) damage, resulting in the track circuit and signal transmission control center column of the CAN bus impedance decreased, leading to 5829AG track circuit transmitter and train control center communication failure.

4. Train protection system (ATP). D3115 times, D301 train are equipped with ATP. ATP signal according to information provided by ground equipment, train control. When the track circuit failure due to other reasons, ATP can not receive signal or the detection of the received signal is non-normal, ATP will take measures to control the train parking brake automatically. After stopping for the train moved on, wait two minutes after the ATP from the complete model to visually monitor traffic patterns to less than 20 km/hour pace. During the visual traffic patterns, such as the normal signal is received, ATP will automatically be converted to full control mode.

5. Train communication equipment. Train drivers and train dispatcher, station attendant called the railway between the mobile communication system (GSM-R), the terminal equipment, including locomotives integrated wireless communications and handheld terminals, the two devices use the same frequency band.

(d) of the accident area meteorological conditions.

According to the accident investigation team commissioned by the State Grid Corporation of lightning protection laboratory monitoring and use of China’s power grid areas where lightning lightning monitoring network of the accident data for statistical analysis, at 19:27 on July 23 to 19:34 Wenzhou South Station sub-signal devices have failure, Yongjia, Wenzhou South Station to Station, Wenzhou Ouhai Station South Station to the railway corridor unusually strong lightning activity, the number of lightning to flash more than 340 times, each containing many lightning return stroke process, the lightning current amplitude of more than 100 kA of lightning appeared 11 times. August 29-September 2, the accident investigation team composed of Meteorology, China Meteorological Administration has commissioned a group of experts, according to the China Meteorological Administration, lightning monitoring system to confirm the above Wenzhou South Station equipment in lightning activity and lightning.

(e) The security situation in the accident location.

the public security organ site survey and investigation of the accident scene found no sabotage railway lines, communications signals, traction power supply equipment and facilities such as signs; Wenzhou South Station traffic room, mechanical room and other communication signals vital sectors driving no abnormal law and order; EMU before the accident the train a good law and order inside. Therefore, excluding vandalism and line security factors.

(f) the relevant units of the accident.

1. Train control center equipment R & D, production units circumstances.

(1) China Railway Signal Corporation (hereinafter referred to as pass No. Group). No. Group Yongwen through communication lines, signal systems integration construction general contractor, has a national engineering investigation, engineering design, engineering, consulting and general contracting qualification grade, railway electrical and telecommunications engineering works such as contracting a number of qualifications .

(2) China Railway Signal & Communication Co., Ltd. (hereinafter referred to through the number of shares). Pass through the number of shares by the number of groups as the main sponsor, inherited through the entire backbone of the enterprise group number, qualifications, the main business, the registered capital of 4.5 billion shares in the reorganized into account the company’s assets and personnel through the Group’s total assets and staff numbers of 98%.

(3) Beijing Research and Design Institute all road traffic signals Limited (hereinafter referred to as pass number Institute). Institute for the pass through the number of shares number of wholly-owned subsidiary, mainly engaged in engineering design, engineering consulting, applied research, standards development, engineering, surveying, engineering, general contracting, trial production and system integration services, with engineering consulting qualification grade, Class survey and design qualification, Grade A project cost consulting and computer information system integration qualification. Borne by the hospital through the number of total contract Yongwen line interlocking, train control systems integration and LKD2-T1-based train control center equipment, research and development. Through the number of automatic train control institute affiliated Research Institute (hereinafter referred to as the control column) for the Institute through the number of internal organs, automatic train control system based on product research and development and systems integration for the core business of the Institute for set of CTCS-2, 3 级 train control system integration technology and equipment suppliers.

(4) Shanghai Railway Communication Co., Ltd. (hereinafter referred to as communications companies). Communications for the number of shares through wholly owned subsidiary, is a set of railway communications signal industry, communications, signals in one device manufacturers and national rail transportation equipment, industrial communication signals designated units, Wenzhou South Station LKD2-T1-based train control center equipment manufacturers.

2. railway transport enterprises and their affiliations situation.

(1) Shanghai Railway Bureau. Shanghai Railway Bureau of Ministry of Railways 18 Railway Bureau belongs to (company) is one of jurisdiction across Anhui, Jiangsu, Zhejiang and Shanghai provinces (municipalities), operating mileage of 7670 km (including: speed of 200 km and 2378 km above mileage ; speed of 250 km and 1777 km above the mileage). Council under section 60 transport station, the train line figure set to open 1774 pairs (including 541 pairs of passenger cars, including 295 pairs of EMU trains, trucks 1233 pairs). Incidents involving coastal dispatcher, Wenzhou South Station, Wenzhou, Wenzhou electric service shop and work area for the South Line Stations under the jurisdiction.

(2) scheduling of the Shanghai Railway Bureau (hereinafter referred to as dispatching). Council is responsible for scheduling the transportation command and control tube work, set up traffic control station 27 (which dispatcher is responsible for coastal traffic Yongwen organization and command line work, set the train dispatcher, assistant dispatcher two positions, the implementation of four classes production industry) . Centralized dispatch coastal displayed on the terminal in Ningbo to a total of 21 stations between Taimu, a reach of 520 occlusion partition line the track occupied by train and other relevant circumstances.

(3) Yongjia station. Yongjia station belonging to the Shanghai Railway Bureau, Ningbo, Operations Section, for the four other stations, mainly responsible for sending and receiving trains and so on.

(4) Wenzhou South Station. South Station, Wenzhou, Ningbo, Shanghai Railway Administration under Operations Section, for the third-class station, is mainly responsible for sending and receiving EMU trains and the origin, and finally to the job and other road work. In the very station control mode, sending and receiving to be performed when the vehicle drive train and joint control.

(5) Ouhai station. Ouhai station belonging to the Shanghai Railway Bureau, Ningbo, Operations Section, for the second station, is mainly responsible for sending and receiving trains and so on.

(6) Wenzhou electric service shop. Workshop is part of Hangzhou, Wenzhou electric power services business segment, responsible for Yong isotherms between Station Hill Station to Cangnan signal equipment maintenance and repair work, signal work area is responsible for their subordinates Ouhai isotherms Ningbo Yongjia Station to Ouhai 563 km 630 meters between stations 280 m to 597 km signal equipment maintenance and repair work.

(7) South Wenzhou, the line work area. Work area under the line south of Wenzhou, Ningbo, Wenzhou, the Public Works section of the bridge line shop, is responsible for station Ningbo to Wenzhou Yongjia isotherms between South Station line of equipment maintenance and repair work.

(8) combined military railway Anhui Company (hereinafter referred to as combined arms Anhui Company). Anhui’s combined military and by the Shanghai Railway Bureau in Anhui Province Investment Group Co., Ltd. a joint venture established in 2005, is responsible for co-Wu Anhui section of line construction and operation. The end of 2009 together with co-Ning Wu Anhui into joint military railway company in Anhui Co., Ltd., responsible for the Hefei-Nanjing railway, military railway co-operation in Anhui Province. Hefei hub headquarters from Shanghai Railway Bureau in February 2005 set up in Hefei, Wuhan line in the co-construction process, is responsible for the introduction of combined Hefei, Wuhan line hub-related projects.

(9) coastal railway Zhejiang Co., Ltd. (hereinafter referred to as the coastal company). Companies from the coastal Zhejiang Province, Shanghai Railway Bureau and Railway Construction Investment Corporation joint venture, established in 2005. The company responsible for the Wen-Fu railway and Ningbo, Zhejiang section of the railway construction and operation temperature. Company consists of Yong-Wen, Wen-Fu Railway (Zhejiang Section) 2 construction headquarters, responsible for the moderate temperature Fu Yong Railway (Zhejiang Section) project engineering, land acquisition, safety and quality, planning and finance and logistics and so on.

3. other relevant units of.

(1) China Railway Fourth Survey and Design Institute Limited (hereinafter referred to as iron four homes). Iron four homes for the China Railway Construction Corporation, a wholly owned subsidiary, with engineering design, engineering, and integrated Class-Class mapping class qualification. In early 2002 took part in the Ningbo-Wenzhou Railway election pre-feasibility study program and was selected to undertake Yongwen line communications, signal, power supply, traction power supply (hereinafter referred to as four electric) systems integration design.

(2) China Railway Engineering Group Co., Ltd. Institute (hereinafter referred to as iron two homes). Iron Second Hospital of China Railway Group Limited, a wholly owned subsidiary, has a comprehensive engineering design qualification grade. September 2006, to participate in the organization of Hefei-Nanjing Railway line four power integrated project bidding and construction contract awarded to undertake part of the signal system project.

(3) China Railway Electrification Bureau Group Co., Ltd. (hereinafter referred to as China Railway Electrification Bureau). China Railway Electrification Bureau of China Railway Engineering Corporation is a wholly owned subsidiary of the total construction contract with the railway grade, railway electrification engineering contracting, rail electric service engineering contractor qualification. March 2008, China Railway Electrification Bureau Group and through a consortium to participate in a number of isotherms four power Ningbo integrated turnkey construction project bids and bid (including China Railway Electrification Bureau is responsible for traction power supply system, power supply system and part of the four electrical construction and housing construction project management and interface coordination of consortium, etc.).

(seven) LKD2-T1-based train control center equipment, research and development, on the road situation.

2006 In September, the Ministry of Railways of the combined arms organization lines (Hefei-Wuhan, Hefei, including stations), Hefei-Nanjing Line (Hefei to Nanjing, Hefei, excluding stations) for four electric integrated turnkey construction projects the tender. No. Group consortium won the bid through joint military lines, selected through R & D Institute No. K5B type train control center equipment, means of communication between stations is 125 MB fiber; Iron II consortium bid Hefei-Nanjing Line Hospital, Beijing and profit when the company selected R & D The LKD2-H-type train control center equipment, means of communication between stations is 100 MB Ethernet.

as joint military communications lines with the Hefei-Nanjing line to the intersection of two lines in Hefei station interoperability, but the two lines use different types of train control center equipment, can not communicate with each other. The Hefei and Hefei-Nanjing Line station also opened the same time, the Ministry of Railways Ministry of Transport-off special technology in June 2, 2007 organized the Hefei-Nanjing railway CTCS-2 级 Train Control System Integration Conference, clear train control center equipment communication interface with iron two homes line the successful use of the Hefei-Nanjing Industrial Ethernet standard 100 MB, requires Hefei station train control center facilities in accordance with the Hefei-Nanjing lines of the same type design than the election. Since then, the Institute decided to begin research and development through the number LKD2-T1-based train control center equipment. In October 2007, through the new R & D Institute No. LKD2-T1-based train control center equipment sent to the on-site installation; November 2007, the Ministry of Railways Division of Science and Technology in conjunction with the Ministry of Transport-off special technology, based in Beijing and the Ministry of profit when the company’s LKD2-H model train control center equipment and pass number Institute of LKD2-T1-based train control center equipment for the technical pre-review; 2007 December 26, Kusakabe issued a “Passenger train control center (LKD2- T1, LKD2-H) technology pre-review comments “(Science and Technology Wan [2007] No. 224), explicitly requires” co-Ning, co-Wu Passenger Road on the project site testing and use, and constantly improve the system function. ” Combined arms company, Anhui, Hefei hub command group agreed with the pass number, according to the Ministry of Railways Division of Science and Technology in Hefei station pre-trial review comments. December 21, 2007, LKD2-T1-based train control center equipment used in Hefei Road station; April 2008, Ministry of Railway Transport (Ministry of passenger special technology, infrastructure and other departments) on the combined use LKD2-line force T1-based train control center equipment has been approved.

2008 April Group consortium won the bid through the No. Ningbo-Wenzhou Railway four electric integrated turnkey construction project, which is responsible for communications, signal system integrated construction contract, the tender documents in Ningbo-Wenzhou Railway Station using 18 the Division of Science and Technology Ministry of Railways only after technical review of LKD2-T1 pre-type train control center equipment.

Second, the accident occurred after

2011 年 7 月 23 日 19 around 8:30, lightning Wenzhou South Station along the railway traction power catenary or near the earth, the earth resistance by coupling or inductive coupling in the signal space to generate surge voltage cables, in a number of lightning surge voltage and DC current joint action, LKD2-T1-based train control center equipment collection drive unit acquisition circuit power supply circuit in the fuse F2 (hereinafter referred to as train control center fuse F2, rated 250 volts, 5 amps) fuse. Fuse the former Wenzhou South Station train control center under the jurisdiction of the track of car-free interval occupied by Wenzhou South Station train control center equipment, serious flaws, leading to a car occupied by the actual follow-up period, the train control center equipment, car-free before the fuse is still occupied by state control output, resulting in Wenzhou South Station train control center device control error signal to upgrade the range to maintain green status.

lightning also caused the track circuit signal transmission with the train control center CAN bus impedance drop, so 5829AG track circuits and train control center of the communication failure, resulting 5829AG send code unusual track circuit, in the absence of code, test code , yellow-green yards without a law change, South Station in Wenzhou Yongjia computer terminal display interlocking Wenzhou South Station to Station Downlink three close (hereinafter referred to as close to down three, that 5829AG section) “red zone.”

19 时 39 points, Wenzhou South Station Station Attendant Kai Zang see the “red zone” failure immediately by telephone to the Shanghai Railway Bureau dispatched by train dispatcher Zhang reported the “red zone “fault conditions, and notify the electric service, inspection, maintenance and public works personnel. Ouhai Wenzhou South Station electrical signal work area emergency duty service personnel Tengan give notice of receipt of failure, arrived at 19:40 driving room, confirm true equipment failure, in the “driving equipment check register” (transport System -46) on the register and immediately Hangzhou electric service to the command center section of safety were reported.

19 时 45 minutes, Tengan give into the mechanical room and found that 6 cabinet several frequency shift track circuit alarm red light.

19 时 55 minutes, received a notice of Wenzhou electric service engineer Chen Xujun workshop, workshop Party branch secretary Wang, Ting Liang squad prepare workers to reach more than 3 people in Wenzhou South Station mechanical rooms, Chen Xujun asked Tengan thanks: “Well, not registered?” Tengan thanks, said: “Well.” Chenxu Jun requirements Tengan stations and give as contact, immediately and Wang, Ding Liang I checked into the mechanical room, drawer track circuit frequency shift found in large red alarm ( After investigation, a total of 15 track circuit transmitter, three receivers and a red alarm light attenuator), Chen Xujun that with a spare transmitter and a trouble-free in the primary and backup transmitter transmitter replacement S1LQG and 5829AG two are red standby transmitter alternate track circuit transmitter, using a single set of equipment to restore first.

20 时 15 minutes, Chen Xujun by asking the room Tengan in the road, thanks to that “red zone” has been eliminated, that is ready to write-off called Tengan thanks. Tengan gift is preparing to write-off, this time 5829AG “red zone” again, thanks to Wang immediately Tengan not write-off. Chen Xujun remove the 5829AG transmitter re-install, work light green points. Subsequently, the Hangzhou section of scheduling electrical service to call for Shen Hua Geng Chen Xujun check other equipment. Chen Xujun to computer room and found out the track circuit interface unit control center right of the last two red light communication board work, we remove these two boards, and remove the right side of the third block of the backup plate inserted in the second plate position, the work light is still red at this time. Chen Xujun immediately (20:34 or so) to the DMIS (Dispatch Management Information System) work area asked about the possible causes, they returned to remove the mechanical room three work lights red receiver. At this point the track circuit train control center right side of second communication interface unit board work light green, Chen Xujun then be removed to restore the two communication boards to two empty positions, and communication boards work light green. Chen Xujun in the computer room to observe.

to the accident, the Hangzhou section of Ouhai electrical service electrical work area service personnel did not Ouhai Wenzhou South Station to Station uplink and Wenzhou Yongjia Station to South Station down line processing of the write-off failure.

20 时 03 points, Wenzhou South Station line foreman Yuan Jianjun work area receiving close on down three “red zone” of the notice, to lead the six employees opens down 584 km Hangzhou-Shenzhen line 300 meters retaining Netcom door and check on the road. 20:30, the Public Works inspectors check to make sure the device works properly, the industrial workers in the Southern District of Wenzhou station liaison officers in the hole and prosperity in the “driving equipment check register” (transport System -46) on the write-off: “Wenzhou South ~ Ouhai between the upstream line, south of Wenzhou Yongjia – line by line checking the Public Works personnel on foot, public works equipment, good delivery. “

19 时 51 分, D3115 Yongjia train into the station 3 stop (punctual assigned should be 19:47, 4 late), normal for the passenger business.

19 时 54 points, Zhang found that centralized scheduling of dispatch terminal (CTC) shows the actual state inconsistent with the site (down three points near the south of Wenzhou in Wenzhou South Station terminal chain of computer displays “red zone”, However, the CTC schedule does not show “red zone”), which required stations arranged Yongjia, Wenzhou, South Station, Ouhai station will be very decentralized model to a self-control station control mode.

20 时 09 points, the Shanghai Railway Bureau dispatched an assistant dispatcher Yang Xiangming notice D3115 train drivers how stable: “Wenzhou South Station down three close a ‘red zone’, no way to open by the signal, there cab signal receiver may be white lights, stop, turn visual traffic patterns continue to travel. “driver Youxiang Zhang was confirmed.

20 时 12 分, D301 train station one stop Yongjia and other signals (punctuality should be 19:36 by, 36 minutes late).

Wenzhou Yongjia Station to South Station in total 15.563 km, of which Yongjia Station to 11.9 km long 5829AG, 5829AG 750 meters long, 5829AG Webmaster 2.913 km to the south of Wenzhou.

20 时 14 分 58 秒, D3115 train station from Yongjia drive.

20 时 17 分 01 seconds, Zhang informed D3115 train driver: “In the case of red light that is converted to visual range of travel mode to less than 20 km/h speed ahead.”

20 时 21 分 22 秒, D3115 train running at 834 meters to 583 kilometers (front location, the same below). Track circuit failure due to 5829AG, triggering automatic train protection system, brake, the train brake sliding, at 20:21:46 stopped at 115 m in 584 km.

20 时 21 分 46 seconds to 20:28:49, send code unusual because of track circuit, D3115 train driver visual traffic pattern three times to switch from the car without success.

20 时 22 分 22 seconds to 20:27:57, D3115 train drivers, train dispatcher call six times, three times Wenzhou South Station Attendant call D3115 train drivers, were not successful (by survey, 20:17 to 20:24, Zhang issued after the D3115 to D301 train train prior to the issuance, confirmed the situation along the other station equipment, and reaffirmed the equipment in Wenzhou South Station to learn about the train up D3212 operation, then made a 8 trains).

20 时 24 分 25 seconds, in Yongjia, Wenzhou South Station to Station Road between the automatic blocking mode is not changed, Yongjia station signal is normal, in line with automatic block section train track release conditions, Zhang required command D301 train station from Yongjia, Wenzhou, towards South Station.

20 时 26 minutes 12 seconds, Zhang Kai D3115 asked Zang train operation, Tsang Kai said: “D3115 close to the train went three sections, but can not contact the train driver on the D3115 , to continue contact. “

20 时 27 分 57 seconds, Kai Zang train call D3115 drivers and call driver reports:” is the line to South Station from the Wenzhou district in front of two isolated segments, integrated wireless communications equipment for locomotive no signal, with the train dispatcher has not contact, coupled with the track circuit signal abnormalities jump, turn visual traffic pattern is not successful, will once again report to contact the train dispatcher. “Zang Kay replied:” I know the. “20:28:42 the call ends.

20 时 28 分 43 seconds to 28 minutes and 51 seconds, 28 minutes and 54 seconds to 29 minutes 02 seconds, D3115 two train drivers, train dispatcher call is unsuccessful.

20 时 29 minutes and 26 seconds in 7 minutes and 40 seconds after the stop, D3115 train visual traffic patterns to start a successful run.

20 时 29 分 32 秒, D301 train running at 497 m to 582 km, Wenzhou South Station technical staff D301 unitary Xiaoqiang call and call the train driver: “You pay attention to EMU 301 runs, interval a car, ah, ah 3115 range are you running now pay attention to, ah, it really do? Now the device (unfinished conversation is interrupted )。”

At this point, D301 train into the track circuit failure 5829AG track section (investigation confirmed the driver to take the emergency brake measures). 20:30:05, D301 train at 583 km 831 meters sentenced to 99 km/hour speed of 16 km/h forward speed train rear-end of the D3115.

accident D3115 train cars derailed 15, 16-bit, D301 Train No. 1-5 cars derailed (the first of which 2,3 Oujiang large vehicles fall under the bridge, the first four vehicles vacant, the first one outside the front of the vehicle in addition to running gear and body scattered bridge; first a pressure in the D3115 vehicle running gear train the first half of the first 16 vehicles, the first five times the vehicle part of the pressure in the D3115 train the latter part of the first 16 vehicles), EMU motor vehicle, 7, big break 2, the broken 5, slightly small break 15, the accident damaged sections of catenary network collapse, break up and down lane 32 hours 35 minutes , resulting in 40 deaths and 172 injured. ,

three emergency disposal

” 7 ? 23 “particularly serious railway accident occurred, the CPC Central Committee, State Council attach great importance to and strong leadership, Zhejiang Province, Wenzhou City Party Committee, government and the Ministry of Railways and other state departments (units) promptly launched the emergency response command structure set up emergency relief, emergency rescue and carry out emergency work.