Test device for simulating pipeline crossing strike-slip fault and determination method

Abstract

The invention relates to a test device for simulating pipeline crossing strike-slip faultand a determination method. The test device comprises a pressure-bearing structure which is constructed to apply tension to a pipeline, and the pressure-bearing structure comprises a pressure-bearing part which is constructed to have a compression resistance characteristic, can generate compressive deformation when the pipeline is stressed, and can enable the stress-strain relationship of the structure to be similar to that of a soil body when the pipeline is stressed by adjusting structural parameters of the pressure-bearing part; a first end, wherein one side of the first end is connected with the pipeline, and the other side of the first end is connected with the second side of the pressure bearing piece in a pressure applying manner; a second end, wherein one side of the second end is connected with pull force, and the other side of the second end is connected with the first side of the pressure bearing piece in a pressure applying mode, wherein the first side and the second side of the pressure bearing piece are opposite in pressure bearing direction, and the pressure bearing direction is parallel to the tension direction. The device and the method can be used for researching the stress condition and the pipe-soil interaction of the pipeline crossing different fault displacements, and can truly and accurately simulate the damage mechanism of the pipeline under the strike-slip fault while reducing the test cost.

Description

technical field [0001] The invention relates to the technical field of long-distance pipeline tests, in particular to a test device and a determination method for simulating a pipeline crossing a strike-slip fault. Background technique [0002] With the development of my country's economy and the improvement of industrialization level, long-distance pipelines gradually tend to develop in the direction of long distances, and it is inevitable that they will pass through some earthquake-prone areas during pipeline transportation. Natural disasters, especially earthquakes, will seriously threaten the safe operation of pipelines. When the strong pressure and tension generated in the crustal movement exceed the strength of the rock layer itself and cause damage to the rock, fault dislocations are formed. The relatively frequent faults that occur in my country's mainland are strike-slip faults. Can the pipeline crossing be accurately simulated? The pipe-soil interaction on strike-s...

AI Technical Summary

Problems solved by technology

Because the soil box test model is limited by factors such as test equipment, cost, and loading synchronization, it cannot carry out full-scale tests of raw materials, and it is difficult to meet similar conditions for full-scale tests

Centrifugal tests can meet the elastic force-gravity similar conditions by adjusting the acceleration of gravity, but only small-scale tests can be performed, and there are also deficiencies in simulating soil shear failure

In addition to considering the cost of the test device, the safety of the tester, and the time control of applying load to the pipeline, the centrifugal test research must also consider the similarity between the test itself and the actual engineering problem due to factors such as soil conditions and similarity theoretical basis. also hard to satisfy

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