Construction method of pipe jacking in silt soil layer based on steel sleeve tool pipe

Abstract

The invention discloses a silty soil stratum pipe-jacking jacking construction method based on a tool pipe with a steel sleeve head. The method includes the steps that firstly, a work well is constructed, wherein the work well used for jacking a construction underground pipeline is constructed, the construction underground pipeline is formed by splicing a plurality of pipeline splicing joints, the tool pipe with the steel sleeve head comprises the steel sleeve pipe, a supporting ring installed on the inner side of the rear end of the steel sleeve pipe and an inserting port fixed to the supporting ring, the wall thickness of the steel sleeve pipe is 0.8-1.2 cm, and the length of the steel sleeve pipe is 80-120 cm; secondly, a jacking device is installed; thirdly, the tool pipe with the steel sleeve head is jacked, wherein the tool pipe with the steel sleeve head is hoisted in place, the tool pipe with the steel sleeve head is jacked, and a soil is manually excavated in the pipe; and fourthly, pipeline jacking is performed, wherein the pipeline splicing joints in the construction underground pipelines are jacked correspondingly from front to back. The method is simple in step, reasonable in design, easy and convenient to construct, good in using effect, capable of easily, conveniently and fast completing the silty soil stratum pipe-jacking jacking construction process and safe and reliable in construction process.

Description

technical field [0001] The invention belongs to the technical field of underground pipeline construction, and in particular relates to a construction method for pipe jacking in silt soil layer based on a steel sleeve tool pipe. Background technique [0002] The pipe jacking method refers to a kind of underground excavation construction method used when tunnels or underground pipelines cross various obstacles such as railways, roads, rivers or buildings. During construction, the pipe is pressed into the soil layer with the hydraulic jack supported on the back seat of the foundation pit through the force transmission jack iron and the guide rail, and the soil on the front of the pipe is excavated and transported away at the same time. After the first section of pipe is fully pushed into the soil layer, then the second section of pipe is connected to the back and continues to be jacked, so that the section of pipe is pushed in, the interface is made, and the culvert is built. ...

AI Technical Summary

Problems solved by technology

Since the sand layer where the depth of the pipe jacking position is located in the above project is the full-section silt layer with high water content and poor arching performance, it must be considered that the sand layer on the top of the pipe is completely pressed on the top of the pipe during jacking, resulting in positive pressure, The frictional resistance caused by the lateral pressure increases; at the same time, it is easy to appear "heading" and top line deviation during jacking of the saturated sand layer

In the process of adopting the traditional pipe jacking construction mode (i.e. manual hand digging pipe jacking construction), when a large amount of silt layer is encountered, it is easy to collapse and construction cannot be carried out. Therefore, it is necessary to improve the traditional pipe jacking construction method

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