Test device for simulating pipeline mechanical reaction in frozen soil environment

Abstract

The invention relates to a test device for simulating a pipeline mechanical reaction in a frozen soil environment, the test device is provided with an outer box body, a refrigeration box body and a test box body, the refrigeration box body is arranged in the outer box body, the test box body is arranged in the refrigeration box body, a support frame is fixed at the bottom of the test box body, anda buried pipeline for testing is fixed on the support frame, a foil gauge is attached to the bottom of the buried pipeline, an observation window is formed in the side wall of the outer box body, a strain line output port connected with the foil gauge through a line is formed in the observation window, a vertical displacement measurer is arranged on the buried pipeline, the scale display end of the vertical displacement measurer is located at the observation window, and the periphery of the buried pipeline is wrapped with a flexible protective sleeve. According to the invention, the mechanical reaction and displacement change process of the buried pipeline under the conditions of different types, different depths and different angles in a frozen soil environment can be simulated, and a test basis is provided for the damage cause analysis of the buried pipeline in the frozen soil environment.

Description

technical field [0001] The invention relates to the technical field of buried pipeline stress research, in particular to a test device for simulating the mechanical response of pipelines in a frozen soil environment. Background technique [0002] Buried pipelines are one of the important channels for the transportation of substances such as oil and gas, and play an indispensable role in oil and gas transportation and urban water and heat supply. Due to the wide distribution of buried pipelines and long transportation distances, it is inevitable to pass through complex geological environments such as permafrost. Frozen soil contains underground ice and has fluidity. Its long-term strength is much lower than the instantaneous strength, which leads to frozen soil Pipelines face hazards such as frost heaving and thawing. Although there are many research results on frozen soil pipelines, the lack of experimental observation system for the mechanical response of buried pipelines ...

AI Technical Summary

Problems solved by technology

Although there are many research results on frozen soil pipelines, there is a lack of experimental observation system for the mechanical response of buried pipelines in frozen soil environments, which restricts the development of research work to a certain extent.

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