Jacking force control method for pipe jacking construction based on continuous real-time monitoring of pipeline stress

Abstract

The invention discloses a jacking force control method for pipe jacking construction based on continuous and real-time monitoring of pipeline stress, which includes the following steps: (1) selecting a plurality of pipe joints for setting monitoring sections along the jacking direction of the pipe, and Mark it well; (2) install strain gauges and collectors on the pipe joints where the monitoring section needs to be set up before it is lowered, and the strain gauges communicate with the external control terminal through the collectors; (3) in the pipeline During the jacking process, the collector collects the strain data on each strain gauge and feeds back to the external control terminal; (4) The external control terminal draws the surface stress of the steel pipe, jacking force, grouting pressure, The relationship curve of the jacking length, and finally the jacking force is controlled and adjusted according to the trend change of the above relationship curve. In this way, the construction can better control and adjust the jacking force to ensure the smooth progress of pipe jacking construction.

Description

technical field [0001] The invention relates to a pipe jacking construction method, in particular to a jacking force control method for pipe jacking construction based on continuous real-time monitoring of pipeline stress. Background technique [0002] With the development of economy and society, there are more and more projects such as underground comprehensive pipe corridors and urban water transmission lines. These projects inevitably cross roads, rivers and existing buildings. If these pipelines laid under the existing facilities adopt a large-area open-cut method, it will not only cause great damage to the existing facilities, but also have a great impact on the environment and traffic. The pipe jacking construction method can well avoid these problems, and the construction speed is fast and the cost is low. The pipe jacking construction mainly refers to setting a jack in the pipe jacking working well 1, and then using a high-pressure oil pump to supply oil to ensure t...

AI Technical Summary

Problems solved by technology

However, due to the complexity of geological conditions, some problems are prone to occur during the pipe jacking construction process, such as the rotation of the machine head and pipe joints during the jacking process, loss of control of the pipe jacking direction, rolling during the jacking process, and surface subsidence, etc.

[0003] Jacking force is the most critical factor in pipe jacking construction, especially in long-distance pipe jacking construction, the inaccurate calculation of jacking force will directly lead to too many or too few relay stations, and too much will result in a large amount of manpower and material resources Waste; too little will cause insufficient jacking force, or the excavation surface will collapse or bulge, or the pipe joint will be damaged if it exceeds the strength of the pipe, or the design stress limit of the back wall will be exceeded, resulting in shear failure of the wall and deformation and instability , affect the smooth progress of the project and even lead to the failure of the whole project. Therefore, how to accurately and effectively control and adjust the jacking force during the pipe jacking construction process is particularly important, but the existing technology lacks corresponding effective methods

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