Sand gushing prevention pipe jacking operation method and system

Abstract

The invention provides a sand gushing prevention pipe jacking operation method and system. The sand gushing prevention pipe jacking operation method comprises the steps that a protection wall is arranged in the preset direction of a pipeline; when pipeline sections of the pipeline are jacked section by section, the protection wall is jacked synchronously, and the distance between a head of the protection wall and a head of a machine head is smaller than the length of the machine head; or after each pipeline section is jacked, the protection wall is jacked by a first preset distance, and afterthe protection wall is jacked by the first preset distance, the distance between the head of the protection wall and the head of the machine head is smaller than the length of the machine head; and agrouting gap is formed between the protection wall and the pipeline, and when the pipeline passes through a preset area, grouting operation is conducted in the grouting gap. A channel excavated by a pipe jacking machine head is structurally reinforced and maintained in time in a synchronous jacking or alternate jacking mode of the protection wall and the pipeline, so that accidents such as sand gushing are reduced, and good practical significance is achieved.

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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