▲ Qingdao High-tech Zone has been built 50 joint trench km, is currently the longest common ditch. Zhang Zaisen photo
our reporter Zhang Zaisen Pan Xu industry
■ such a large scale investment into the invisible underground pipe network, rather than high-rise buildings and landmarks on the . And this return is not present.
■ “Pa Road, the phenomenon also exists abroad, and the difference is that domestic and foreign departments Pa Road will be a joint application, at the same time construction. The experience of learning this over, how much to spend? “
reputation of the” Legend “:
German-made sewer, can not be copied?
“to the subway to see the waterfall,” “to see the sea of ??Wuhan” … …
since the summer, Beijing, Chengdu, Wuhan and other cities suffered another heavy rain, similar to the scripts rumor network. In these cities into the embarrassment of waterlogging in a hundred years ago the German man-made drainage, has become a legend.
east from the Qingdao Pier 50 meters, an obscure underground drain leading to the old city. Underground drain two meters tall, four or five meters wide, Qingdao population as the “underground drain where you can run this car,” does not seem nonsense.
This is the legendary German-made sewer. Qingdao drainage staff said, foreign media correspondents into the ditch will sigh: there is such a drainage system, Qingdao, how could a “sea town”?
1898, Germany’s strong rental Jiaozhou Bay, Qingdao, this should only 20,000 people were fishing, playing a model colony. Germans mobilized leading urban planning experts and architects came to Qingdao, according to the late 19th century Europe’s most advanced urban planning concepts, planning for Qingdao city, is only part of the drainage system.
1901, at the behest of the rubber O Governor, a designer named one William Qingdao area drainage network will be designed to rain, sewage diversion mode, laying underground drainage pipes, repair culverts. Qingdao, China became the first realization of sewer “of rain and sewage separation” of the city. By 1905, the laying of water pipes Qingdao area 29.97 km, 41.07 km of sewage pipelines.
2008, the Qingdao Municipal engineered when he unearthed a cement pipe, cement pipe this into heritage is at the German-designed drainage channels. Pipe height of about 80 cm, width 40 cm wide and narrow cross-section goes to the oval-shaped, narrow part of the following labeled tiles.
drainage, according to professionals, that under the wide and narrow design, the force can not only reduce the pipeline, you can also make the flow of rainwater in the case of small to maintain a high flow rate, reducing sediment deposition, conservation to reduce pressure. Paste tiles, in order to prevent corrosion, to extend pipe life.
planning according to the old city of Qingdao, this is sufficient to cope with heavy rain gutter. But now, the Qingdao urban area has expanded to 1159 square kilometers. The newly expanded area, in accordance with national urban common patterns laying of underground pipelines, reach the large rainfall when the drainage capacity.
2011 年 7 2, astronomical tide period, Qingdao has suffered the biggest one this year, rain, continued until 3 am, four downtown rainfall of 182.5 mm. Local media reported that “some sections of the city into the sea water is difficult, many sections of an ocean.”
Qingdao Urban Drainage Management Department’s website information display, July 2, heavy rain, the drainage at the “super start flood control plan, 368 people who were deployed to deal with more than 100 at the water, remove dangers are more than 300. “
local expert who asked not to be named, said the drainage from the terrain, the century-old Germany drainage system, sufficient to cope with for many years in case of heavy rain. Although it has a new drainage system can cope with everyday use, but run into similar this July 2, heavy rain, the narrow layout of the pipeline and unreasonable, difficult to quickly remove water.
Qingdao Drainage Management Department staff explained in an interview with reporters that the German construction of sewage pipeline is based on three hundred thousand population of small urban design. With the Qingdao population density increased, the amount of natural water and sewage much larger than the original. Now the city needs a larger capacity drainage. “In this one, our technology can be achieved, but capital investment may be allowed.”
return is not present:
the longest common ditch, 50 years digging
7 月 2 日 day of the rainstorm, High-tech Zone, Qingdao Drainage Works Department engineers have been working outside security light, on the part of the water points artificial drainage.
called light water security, in fact, will diffuse through the ankle, “in Jinan, Qingdao, the main city, and perhaps this is not water, but the starting point for high-tech area drainage plan, which has reached the water level. “An open well grate light workers, check for spam blocking.
on the main road in the high-tech zone, the reporter saw no one on the road manhole covers, neatly ranked well in the street grate. “External only see these rain grate, manhole covers arrangements in the green belt, the head of 1200 mm, which can respond in 50 years of heavy rain.” Ann Light said.
these wells grate in a section of the emission intensity, have been carefully calculated. “If a place of annual rainfall, the probability of large water there, then there’s the more well grates, some under the water should be thick.” Safety light that, in the planning and design, they invited experts various regions may be specifically calculated the flow of water, sewer and storm water grate planning and design density.
This design is very simple, not much money to spend, but the effect was immediate. This sophisticated design details, in the year the streets of German design reflected in the water pipes. Qingdao Luhai former curator of the library to provide the information, also designed a German known as “water fight” to the authorities. This cross section appear before the rain bucket “h” shape, into the rain, the dirt was precipitated to the left of the “struggle”, while the quality of light rain along the right side of the pipe to drain away. In this way, easy to clean up debris, it will not cause congestion.
and high-tech zones in the construction of the common trench, it is Costly. Common channel is called the “underground city comprehensive pipeline corridor,” according to High-tech Zone Qingdao, Vice Minister Wang Qinglin organizing awareness introduction, co-channel built in the high-tech area Ao East, to attract Road, East Road and other main roads of the green belt , the groove width of 3.35 meters, 2.6 meters high, with a total plan of 64 km has been constructed 50 km.
correspondent saw in the common trench, placed neatly on both sides of different color channels. “This is the heating pipes, the yellow sign hanging across the lines of communication is below some of the tubes is thick black water pipe, which is above the power lines.” Staff, the current total of eight in the pipeline trench. These pipelines include almost imagine the municipal engineering: electric power, telecommunications (cable television), water supply, water, heat, traffic signals and other pipelines; ancillary facilities including those for the normal operation of drainage, ventilation, lighting, electrical, communications, security monitoring systems.
“If there’s pipeline problems, and the workers under the ditch maintenance, no drilling of the road.” Ann Light said.
construction of Qingdao High-tech Zone has said that Deputy Secretary Pu Hongjiang, a common trench to allow sufficient space for the future need to increase the pipeline or lines can be laid directly on the inside. Pipeline companies can go directly from the inside, thus saving the cost of their excavation of the road. To build a comprehensive multi-buried trench than a one-time investment of about 40% of the funds, but overall, 50 percent to save money.
local media reports, the common trench one meter costs about $ 30,000, one kilometer investment is 30 million yuan, according to 64 km, with the total investment of 20 billion yuan. High-tech Zone, Qingdao from the start to the end of 2010, total infrastructure investment of billions.
such a large investment into the invisible underground pipe network, rather than high-rise buildings and landmark buildings. This return is not immediate, but in the next 10 years, 20 years and beyond. High-tech Zone relevant government sources, these inputs are worth it, “at least not as it now is ‘Pa Road’, with this common channel, high-tech roads in the area can guarantee that 50 years without excavation.”
“road zipper” in Qingdao is not uncommon. Urban Yan’an Road, Renmin Road and other repeated excavation, has triggered rising public complaints, and even Hong Kong Middle Road, East Road, Shandong Road, Shinan District, which is located in the “facade Road”, was not spared. The latter roads that are more than a decade with the Qingdao municipal government to build up when moved eastward, with the surge in population density, underground pipelines overwhelmed, frequently burst pipes, leading to frequent excavation, many public complaints.
money is a problem, planning very difficult to change, but if well managed, and details
construction of high-tech zone of this model, many experts, “can not be copied”, it is impossible to promote the city in shape.
high-tech zones had come to interview a person in charge of media correspondents say, high-tech zones “like a white, urban redevelopment, and many do not consider the issue, you can plan from scratch , construction, builders to provide a complete play space. ”
“First of all, money is the biggest problem.” City deputy director of the Academy of Social Sciences, Qingdao cool the building of this huge investment patterns have their own views, in his view, the city has been formed , the excavation of as much as building new subway project, the social cost of consuming too much. “Pa Road also exists the phenomenon of foreign and domestic difference is that a number of departments of foreign Pa Road will be a joint application, at the same time construction. The experience of this study over, to spend much money?”
But certainly this cool looking design and planning, he has also been put forward various proposals to government departments. In addition to pipeline and the “road zipper”, the Qingdao growing traffic problems, but also to the familiar Qingdao city planning and development experts are concerned.
calmly said, Qingdao existing transport vehicles, 30% -40% of transit vehicles, “city transit road should not bear the task now, many large projects Jiaozhou end time general in 2013 and 2014 years, imagine how much these projects will flow and the flow of goods, if all the roads through the city of Qingdao, is simply unthinkable. “even if the opening near the new tunnel,” If the west coast of Qingdao has developed, and one day car block to the tunnel, not sensational. “
However, the existing plan has been set to Qingdao the overall appearance of the plate. Cool that the planning has been difficult to improve, but if the management and details of the well, can also solve the problem.
He likened the entire road transport vessels, a major thoroughfare as the city’s main blood vessels in the human body requires a large number of capillaries with and support to nutrition to the body every place. Now the urban road planning, especially for large channel favored, but neglected branch of the construction and planning, leading to the city’s “capillary” is not smooth, “Now the main blood vessels blocked, but can not find the use of capillary to ease. “
Ningxia Road, Qingdao, near the reporters in the interview, the peak at 18:00 hours, one hour wait is not hit on the train. Even if the encounter empty, ask the driver where, if the road is a very serious traffic jams often make excuses rejection.
“The most fundamental reason is that the 1990s development planning in Qingdao, the lack of proof.” Calm that now, including drainage, traffic and other problems, strictly speaking, there are relationships and planning.
study in cool, Qingdao since 1910 laid along the Jiaozhou Bay on the east coast from south to north with the development of urban space shaped pattern, until the late 1980s, urban development are not out of Qingdao The urban form, it has always been considered an efficient, dynamic and open urban system.
“the German people Qingdao design a modern urban development planning, the Japanese and later continue this tradition.” Calm, Qingdao city of the first generation framework, is the 1930s when the mayor Shen Honglie ride Well, to the mountain as the center, limited to waterfront; second-generation urban framework began the early 1990s, the city widened the scope to Hong Kong Middle Road, the equivalent time in 10 years built a new city.
information, YuZhengSheng after taking office, the municipal government moved eastward, a piece of land previously Fushan commune, full of weeds, dirt roads, beaches, but then move into a classic case of urban development .
to 2000, Qingdao re-expansion of city roads built to the Laoshan, and began the construction of 280-km coastal road. Qingdao urban development from the linear development to the development of a triangle, including Qingdao, Huangdao, Red Island, including the range is called the “big Qingdao.”
Qingdao, who asked not to be named, experts on the Qingdao growing traffic problems brought to show concern, “the city is growing, but traffic, drainage problems and did not follow the vision of urban development planning and transformation, a few years, Qingdao, may also block was a mess. “
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