A test device and method for analyzing the influence of land subsidence on pipe-soil interaction

Abstract

The invention relates to a testing device and method for analyzing the influence of ground subsidence on pipe-soil interaction. The testing device comprises a model box, a soil body, a pipeline, a ground subsidence analog device and a pipe-soil measuring device, wherein the ground subsidence analog device comprises water bags, a water pipe, a concentrator, a water main, a switch, an adjusting valve, a flowmeter, a water collector and a deformation compatibility plate; the pipe-soil measuring device comprises a distributed sensing optical fiber, an OBR backlight reflectometer, a thin film pressure sensor, a data acquisition instrument, a pipeline subsidence mark, a laser displacement meter, a soil body subsidence mark, a high resolution digital camera and a computer; the water bag array isarranged according to the subsidence type; the pipeline is fixed at a preset depth; all the measuring instruments are connected to the computer, and data are acquired by software; the soil body prepared in advance is filled in the model casing; and water is drained from the water bags, the acquisition is stopped until the deformation of the pipeline and the soil body is basically stable, and the data are stored.

Description

technical field [0001] The invention relates to the field of indoor tests of land subsidence and pipe-soil interaction, in particular to a test device and method for analyzing the influence of land subsidence on pipe-soil interaction. Background technique [0002] As an important material basis for the survival and development of cities, underground pipelines are responsible for the city's information transmission, energy transmission, drainage and disaster reduction, waste disposal and other functions, and are known as the "lifeline" of the city. Underground pipelines are distributed in a wide range and have long transmission distances. When passing through areas with complex geological conditions and intense crustal activity, the pipe-soil interaction is very significant, and the pipelines often undergo large deformation or even damage, which affects the normal use of underground pipelines and even causes damage. to catastrophic consequences. [0003] On the one hand, the...

AI Technical Summary

Problems solved by technology

Although this type of monitoring technology can obtain information such as settlement, displacement, stress, and strain of local points of the pipeline, it has defects such as low sensing accuracy, difficult embedding, susceptibility to electromagnetic interference, and poor durability.

At the same time, the data obtained by this type of test method is relatively limited, and cannot completely and comprehensively reflect the pipeline displacement, soil resistance and its development trend over time, so it is difficult to make scientific predictions and assessments of the safety of underground pipelines

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