A method and system for anti-swelling sand jacking pipe operation

Abstract

The invention provides a method and system for anti-swelling sand-top pipe operation, the method includes setting a protective wall in the preset direction of the pipeline; while jacking the pipeline joints one by one, synchronously jacking the Retaining wall, the distance between the head of the retaining wall and the head of the machine head is less than the length of the machine head; or after each section of the pipe joint is pushed in, the retaining wall is pushed into the first preset distance, after the retaining wall is pushed into the first preset distance, the distance between the head of the retaining wall and the head of the machine head is less than the length of the machine head; In the grouting gap, when the pipeline passes through the preset area, the grouting operation is carried out in the grouting gap; the channel excavated by the pipe jacking head is carried out by means of synchronous jacking or alternate jacking of the retaining wall and the pipeline Timely structural reinforcement and maintenance to reduce the occurrence of sand inrush and other accidents has good practical significance.

Description

technical field [0001] The invention relates to the field of engineering construction, in particular to an operation method and system for anti-swelling sand-jacking pipes. Background technique [0002] figure 1 A schematic diagram showing the engineering structure of the existing pipe jacking construction. Pipe jacking construction is a construction technology for pipeline burial without excavation or less excavation. Pipe jacking construction is to use the jacking force generated by the pipe jacking machine in the starting shaft to overcome the friction between the pipe and the surrounding soil, push the pipe into the soil according to the designed slope, and transport the earth away. After the jacking operation of one pipe joint is completed, the second pipe joint will continue to be jacked, and the operation will continue until the machine head passes through the soil layer and reaches the receiving well and is hoisted. Several pipe joints are combined to form the requ...

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Problems solved by technology

[0004] On the one hand, due to the great impact of sand and water (mortar) on the force balance of the soil, it takes a long time to recover, and at the same time, the pipe jacking equipment needs to be repaired before it can work again after being flooded, and the construction period is greatly delayed; on the other hand, the top After the pipe operation is terminated unexpectedly, the pipe jacking pressure required to start again is relatively high. The original pipe jacking equipment may not be able to support the operation, and the equipment needs to be re-erected, which will cost a lot

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