A device and method for model experiment of pipe and culvert on frozen ground under traffic load

Abstract

The invention discloses an experimental device and an experimental method for a pipe culvert model on a frozen ground under the action of traffic loads, comprising an outer box body and an inner box body. The simulated soil is laid, a test pipe culvert is set in the simulated soil, and a servo hydraulic loading system is also included, which is fixed on the upper part of the outer box; the water inlet control system and the drainage collection system are respectively arranged on the upper side of the outer box and the outer box. Below the opposite side; the traffic load simulation system is located on the cover of the inner box and below the cover of the outer box; the pressure sensing system is distributed around the test pipe culvert in the inner box; the PIV test system is located outside Outside the box, the stress characteristics of the pipe and culvert on the permafrost foundation and the displacement of the surrounding fill are studied under the traffic load. The present invention considers the influence of traffic load and freezing and thawing on the pipe culvert, analyzes the force of the pipe culvert and the displacement of the surrounding filling, and can more realistically simulate the influence of the vehicle passing on the embankment in the frozen land area on the pipe culvert.

Description

technical field [0001] The invention relates to the technical field of geotechnical test equipment, in particular to a pipe culvert model test device on frozen ground under traffic load, and also relates to an experimental method for a pipe culvert model test device on frozen ground under traffic load. Background technique [0002] The permafrost area in my country is vast, and about 53.5% of the land area belongs to the seasonally frozen soil area. The freezing and thawing of the foundation soil in the frozen soil area is a key problem affecting the safety of the roadbed. The frost heave and thawing of the foundation soil have a significant impact on the force of the culvert. The stress gradient between the bodies causes the vertical displacement of the culvert and the additional stress of the culvert. At the same time, with the rapid economic development, the volume of logistics and transportation is increasing day by day, and the influence of traffic loads, especially he...

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Problems solved by technology

For this part of the research, there is a lack of relevant test equipment at home and abroad, and it is impossible to effectively study this part of the content.

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