Large-scale ground buried gas conveying pipeline damage simulation test device and method under landslide effects

Abstract

The invention provides a large-scale ground buried gas conveying pipeline damage simulation test device under landslide effects. The device is used for simulating the stress, displacement and deformation conditions of a ground buried gas conveying pipeline under the effect of landslide disasters. Meanwhile, the invention provides a large-scale ground buried gas conveying pipeline damage simulationtest method. The device and the method can be used for simulating the pipeline landslide tests under the conditions of different pipeline inner pressure / landslide soil property / pipeline burying depth / environment rainfall quantity conditions. The test device can be used for monitoring the data including the pipeline inner pressure, the pipeline strain, the thrust on the pipeline generated by landslide soil, landslide body deep part displacement, rainfall quantity, underground landslide soil pore water pressure and underground landslide soil water content parameters. A set of underground gas conveying pipeline landslide disaster simulation test device, automatic rainfall device and landslide underground soil monitoring device is completed; through the monitoring on relevant data, the landslide body development condition and pipeline stress characteristics are mastered; the influence rule of the landslide on the pipeline is analyzed; the basis is provided for the future pipeline landslide monitoring parameter selection, equipment type selection and monitoring point distribution.

Description

technical field [0001] The present invention designs a large-scale failure simulation test device for buried gas pipelines under the action of landslides, which belongs to the field of landslide disaster prevention and control of gas pipelines, and is used to simulate the stress of buried gas pipelines under the action of landslide disasters under different working conditions and deformation. Background technique [0002] Landslide refers to the overall sliding damage caused by shearing along a certain weak surface inside the slope under the action of gravity and other factors under certain natural and geological conditions. A landslide is a nonlinear system, a complex formed by the interaction of various complex factors, and its evolution is cyclical, usually a progressive deformation and failure process. As a common geological disaster in mountainous areas of our country, it has the characteristics of strong destructiveness, wide range of influence, and difficulty in prev...

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Problems solved by technology

The situation of buried pipelines suffering from landslides is more complicated, and it is difficult to obtain reliable conclusions solely by numerical simulation, and the obtained calculation results cannot be directly applied to actual construction

[0004] The development of landslide disaster simulation test devices in China is relatively slow. Traditional pipeline landslide test devices can only explore the influence of landslide pressure or landslide vibration on the strain of pipelines by designing simple test devices. There are few monitoring parameters and cannot meet the needs of various conditions. Due to the requirements of the simulation test, it is impossible to grasp the displacement rate, displacement variation and the impact of rainfall on the landslide displacement at each development stage of the landslide.

The current test monitoring device is vulnerable to electromagnetic interference and strain damage, and its reliability and stability need to be improved

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