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trenchless engineering technology completely solves the problems of damage to urban buildings and road traffic congestion in pipeline laying construction, and highlights its advantages in stabilizing soil layer and environmental protection. This is very important for cities with heavy traffic, dense population, numerous ground buildings and complex underground pipelines. It will create a clean, comfortable and beautiful environment for the city<
trenchless technology is a term that has been used frequently in recent years. It refers to the use of less excavation, that is, the working well and receiving well need to be excavated, and no excavation, that is, the pipeline does not excavate technology to lay or replace underground pipelines. The diameter of pipe jacking is dn800-4500. The pipe to be buried is pushed into the soil through the working well. The pipe in a working well can travel more than 1500 meters underground and can also travel in a curve to bypass some underground pipelines or obstacles
its technical key point is to correct the deviation of pipe extension in the underground. It is especially suitable for trenchless laying of large and medium pipe diameter. It has the comprehensive functions of economy, high efficiency and environmental protection. The advantages of this technology are: no ground excavation; No demolition, no damage to ground buildings; No impact on traffic; Do not damage the environment; The construction is not affected by climate and environment; It does not affect the segment difference deformation of the pipeline; Time saving, high efficiency, safety and low comprehensive cost
this technology is widely used in trenchless laying of urban underground water supply and drainage pipelines, natural gas oil pipelines, communication cables and other pipelines in the economically developed coastal areas of China. It can cross roads, railways, bridges, mountains, rivers, Straits and any building on the ground. This technology can save a lot of land acquisition and demolition costs, rece environmental pollution and road congestion, and has significant economic and social benefits.
The quantity of pipe jacking is calculated according to the linear distance from the jacking in end to the jacking out end. Pipe jacking construction is an underground pipeline construction method developed after shield construction. It does not need to excavate the surface layer, and can cross roads, railways, rivers, ground buildings, underground structures and various underground pipelines
pipe jacking construction is a trenchless construction method, which is a kind of pipe laying construction technology with no excavation or less excavation. Pipe jacking construction is to overcome the friction between the pipeline and the surrounding soil by means of jacking force generated by jacking equipment in the working pit, push the pipeline into the soil according to the designed slope, and transport the earthwork away
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the main problems of pipe jacking technology in China are relatively backward mechanical equipment technology, obvious regional differences, uneven level, lack of standardization, lack of talents, which need to be further promoted. China mainly depends on imports for pipe jacking machinery and equipment. Although there are domestic proction enterprises, the technology still lags behind the international advanced level
the type of roadheader is not enough to meet the needs of engineering, there is no rock disc roadheader suitable for medium strength rock strata in China, the range of adaptability to soil is not wide, and the level of rability, mechanization and automation is not enough. Regionally speaking, the development of pipe jacking technology is compatible with the regional economic level of our country
the development level of pipe jacking technology in eastern China is far higher than that in central and western regions, and only Guangdong, Shanghai, Zhejiang, Jiangsu and Shandong account for 75% of the trenchless pipe laying workload