Pipe jacking construction method for complex geological layer

Abstract

The invention discloses a pipe jacking construction method for a complex geological layer. A slurry balance composite cutter rock breaking type pipe jacking machine is adopted. The method comprises the following steps of installation of facilities in a pipe jacking well, pipeline installation, launching of a jacking pipe, advancing of the jacking pipe, intermediate jacking station construction and arrival of the jacking pipe to a receiving well. The installation process of the facilities in the pipe jacking well comprises the following steps that a back wall is reinforced, a back rest is installed, a pipe jacking machine goes down to the well in place, two starting rails are installed, a heading machine is installed, a measuring instrument is installed, and a tunnel portal sealing and water stopping device is installed. In the process of launching of the jacking pipe, when the heading machine goes out of a hole, U-shaped iron is used for pressing the tail of the heading machine, and the head of the heading machine is prevented from being knocked; when the heading machine is jacked, a certain amount of lubricating slurry is injected into a gap between the outer surface of a pipeline and a stratum in a pressing manner, so that a layer of slurry sleeve is formed among the heading machine, the pipeline and the stratum; and in the process of advancing of the jacking pipe, normal jacking and pipeline welding are carried out. By means of the pipe jacking construction method, disturbance to the stratum can be effectively reduced.

Description

technical field [0001] The invention relates to a pipe jacking construction method used in complex geological layers. Background technique [0002] Sewage bay discharge is a form of sewage discharge in which the sewage discharge outlet is located in the bay and discharged into seawater. The sea discharge pipe leading from the sewage treatment plant is formed by connecting the land section and the sea section. The sea pipes in the land area shall be buried on land to the coast, and then connected with the sea pipes in the sea area through the land transition section. Considering factors such as pipeline burial depth, excavation conditions, and economy, pipe jacking construction is often used for pipelines with large burial depths and no excavation conditions. Pipe jacking construction is an underground pipeline construction method developed after shield tunneling construction. It does not need to excavate the surface layer, and can cross roads, railways, rivers, ground buil...

AI Technical Summary

Problems solved by technology

At the same time, when there are many boulders with high strength on the jacking axis, it is difficult for the equipment to control the direction and break it, so the jacking speed is slow and the formation is greatly disturbed

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