Pipe-jacking three-points-and-one-line construction method

Abstract

The invention discloses a pipe-jacking three-points-and-one-line construction method. The method comprises the steps of 1, conducting construction preparation and tool allocation; 2, excavating a pipe-jacking well, and constructing surrounding enclosing shelters; 3, determining central points of the two sides of a wall of the pipe-jacking well, and connecting the central points to form a line; 4, picking three points on the connection line, projecting the three points into the pipe-jacking well, and connecting the three points into a projection line; 5, guiding the projection line into a pipe-jacking pipeline through a laser snapline instrument; and 6, conducting pipe-jacking construction. According to the pipe-jacking three-points-and-one-line construction method, the straight line is determined through two pipe wells; the three points on the straight line are picked and projected into the pipe-jacking well; the projected three points form a straight line; and a longitudinal line of a cross line obtained through projection conducted through the laser snapline instrument coincides with the projection line, a transverse line coincides with a pipe-jacking left quadrantal point and a pipe-jacking right quadrantal point, and the midpoint of the cross line coincides with the midpoint of the pipe-jacking pipeline. By means of the pipe-jacking three-points-and-one-line construction method, it is guaranteed that a pipe-jacking construction route is correct; the jacked pipe is prevented from being shifted in the ingress process; and pipe-jacking construction precision is improved.

Description

technical field [0001] The invention relates to a pipe jacking construction method, in particular to a pipe jacking three-point-one-line construction method. Background technique [0002] Pipe jacking construction is a trenchless construction method, which is a pipeline burial construction technique with no or less excavation. The pipe jacking method is to use the jacking force generated by the jacking equipment in the work pit to overcome the friction force between the pipeline and the surrounding soil, push the pipeline into the soil according to the designed slope, and transport the earth away. After a section of the pipe has been pushed into the soil layer, the second section of the pipe will continue to be pushed in. The principle is to push the tool pipe or the roadheader from the working pit through the soil layer to the receiving pit with the help of the thrust between the main top oil cylinder and the pipeline and the relay room. The pipeline is buried between the...

AI Technical Summary

Problems solved by technology

[0003] In pipe jacking construction, it is not easy to ensure that the path is in a straight line during the underground excavation construction and pipe jacking process. If the path is curved, the pipe jacking will deviate during underground excavation and pipe entry, which reduces the accuracy of pipe jacking construction. It will also destroy the underground land resources due to the secondary disturbance caused by the displacement of the pipe jacking

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