Application of pipe jacking technology in urban rainwater and sewage pipelines?

Discussion on the application of pipe jacking technology in urban rainwater and sewage pipelines? Want to know the answer, the following is the construction related content of pipe jacking technology in the application of urban rainwater and sewage pipelines, and the basic situation is as follows:

Pipe jacking construction method is a construction method of laying underground pipeline by using the thrust of jacking equipment such as main jacking oil pump. The tool pipe or roadheader enters the receiving well from the working well through the soil layer along the line. At the same time, the following pipes are connected in turn and buried in the soil layer of the pipes of these two wells. As an earlier trenchless construction method, pipe jacking technology has been widely used in drainage engineering in recent years because of its high construction accuracy, wide applicable soil, wide applicable pipe diameter range, low comprehensive cost and little environmental pollution, and it can cross rivers, highways, railways, buildings or obstacles.

Construction process flow: measure and locate the dewatering pit at the well point, make and install the back iron guide rail, install the jack, install the pipeline, install the cross iron at the nozzle, dig out the soil, jack up and retract after the stroke is over, and the jacking iron will continue to push forward and retract repeatedly, cushion the jacking iron, take out the jacking iron, install a section of pipeline, and carry out repeated grouting in the next cycle.

In the actual drainage pipe jacking construction, in the process of pipe jacking excavation, due to unscientific design parameters and inadequate construction survey monitoring, the overall stress of the pipe jacking is uneven, and the pipe jacking is damaged or even broken under the comprehensive action of local areas. Therefore, before the pipe jacking construction of sewage pipe, it is necessary to scientifically calculate the stress from all aspects and scientifically prepare concrete to ensure that it meets the required performance of pipe jacking construction, so as to ensure the smooth progress of pipe jacking construction. However, due to many problems such as construction technology, equipment, personnel, etc., some construction units did not scientifically implement the relevant national construction specifications and procedures, which led to problems such as pipeline rupture in pipe jacking construction.

Pipe jacking construction technology is a kind of trenchless underground pipeline laying technology with good environmental protection, which fundamentally changes the backward slotting and pipe burying method. With the progress of pipe jacking technology and the maturity of construction experience, pipe jacking method will be more widely used in municipal drainage construction.

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