A construction technique for installing inner sleeve steel pipes in pipe jacking

Abstract

The invention discloses a construction process for installing an inner sleeve of steel pipes in a pipe jacking, comprising the following steps: completing the construction of a pipe jacking working well, a concrete pipe jacking and a receiving platform; hoisting a lift truck on the pipe section receiving platform; The first pipe section is hoisted to the pipe section receiving platform; the first pipe section is transported into the concrete jacking pipe by the lifting transport vehicle, the first pipe section is installed and fixed, and the lifting transport vehicle is withdrawn from the first pipe section; the next pipe section is hoisted to The pipe section is received on the platform; the pipe section is transported to the previous pipe section by the lift truck and installed and fixed; repeat the above steps until all the pipe sections are installed and fixed in place. Realize the installation of pipe sections in a narrow space, reduce the cost of engineering equipment, accurately adjust the installation height and slope of the pipe sections, ensure the quality of pipeline construction, reduce the interaction between the pipe sections to be installed and the pipe jacking, and avoid damage to the pipe jacking and pipe sections. The truck works in a cycle, and two transport trucks can work at both ends at the same time, which improves the installation efficiency and greatly shortens the construction period.

Description

technical field [0001] The invention relates to the technical field of pipeline construction, in particular to a construction technique for installing inner sleeve steel pipes in pipe jacking. Background technique [0002] With the vigorous development of national urban infrastructure construction, the density of urban roads, rail transit, expressways, railways and other traffic road networks and pipe networks is increasing, and there are more and more cases where new drainage pipe networks intersect with the above road networks. When the surrounding site does not affect the safety of existing facilities and the surrounding environment, the construction of new drainage pipes is generally carried out by open and cut methods. With the release of soil pressure in foundation pit excavation, improper support measures can easily cause deformation and displacement of road structures. When crossing busy municipal roads, rail transit, expressways, and railways, open-cut construction ...

AI Technical Summary

Problems solved by technology

Since the inner casing is pushed by the pipe jacking machine in this method, the installation accuracy of the inner casing cannot be adjusted and is difficult to control in this method; the jacking can only be started after the connection between the pipe joint of this section and the previous pipe joint is completed, and the construction period of this method Long; during the jacking process, the friction between the inner casing and the jacking pipe is large, the required driving force is large, and the risk of damage to both increases, and the quality is difficult to guarantee; the pipe jacking machine is used for a long time, and the cost of engineering equipment increases

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