Experiment device and experiment method for physical model for tunnel construction adopting pipe roofing freezing method

Abstract

The invention provides an experiment device and an experiment method for tunnel construction adopting a pipe roofing freezing method, and belongs to the technical field of tunnel engineering. The device comprises an experiment platform, a loading system, a soil mass, a steel pipe support, a plurality of simulation jacking pipes, a freezing system and a data acquisition system, wherein the experiment platform is used for providing an installation space; the loading system comprises a box body installed on the experiment platform, a counter-force frame located above the box body and fixedly installed on the experiment platform, and a hydraulic cylinder arranged between the counter-force frame and the box body; the soil mass is arranged in the box body; the steel pipe support is arranged in the soil mass; the plurality of simulation jacking pipes are movably installed on the steel pipe support to form a pipe roofing and the pipe roofing is arranged in the soil mass; the freezing system is used for freezing the pipe roofing to form a frozen wall; and the data acquisition system is used for acquiring temperature information, displacement information and pressure information of the pipe roofing. The experiment device for the physical model for tunnel construction adopting the pipe roofing freezing method is capable of carrying out field simulation on the pipe roofing freezing method; and comprehensive and systematic research is carried out on the pipe roofing freezing method, so that reference basis is provided for further popularization and use for the pipe roofing freezing method.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering. Specifically, the invention relates to a construction physical model experimental device and an experimental method of a tunnel pipe curtain freezing method. Background technique [0002] The pipe curtain freezing method is a new tunnel construction method that uses the pipe curtain formed by pipe jacking as the load-bearing structure, and the permafrost formed by artificial freezing as the water-stop curtain, which fully combines the advantages of the pipe curtain method and the artificial ground freezing method. . This construction method is a new construction method suitable for shallow-buried super-large cross-section tunnels in saturated water-rich soft soil strata. At present, there is a lack of comprehensive and systematic research on this construction method, which is very unfavorable for the further popularization and utilization of this construction method. Similarity model...

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Problems solved by technology

[0003] The object of the present invention is to provide a kind of tunnel pipe curtain freezing method construction physical model experiment device and experimental method, to at least solve the technical problem that can't carry out similar model experiment to pipe curtain freezing method in the prior art

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