Surface collapse hidden danger monitoring method applied to shallow sand layer

Abstract

The invention relates to a surface collapse hidden danger monitoring method applied to a shallow sand layer, and relates to the technical field of geological disaster detection and monitoring. The method comprises the steps: employing a vehicle-mounted three-dimensional ground penetrating radar to carry out comprehensive general investigation on a suspected hidden danger road segment after hiddendanger inspection, and determining the hidden danger distribution; adopting a vehicle-mounted three-dimensional ground penetrating radar, pipeline detection, drilling verification and a three-dimensional laser scanner to carry out detailed investigation on the hidden danger development degree, and determining a ground collapse hidden danger monitoring area; carrying out level deformation, water level, soil body layered settlement and ground surface settlement monitoring on the influence area of the ground collapse monitoring area; and monitoring the deformation trend of the ground collapse hidden danger monitoring area in real time by adopting a total station. The problems that an existing monitoring method is not high in accuracy and not suitable for popularization and practical application are solved. The method can achieve the multi-stage and multi-angle accurate monitoring and early warning of the hidden danger of surface collapse of the shallow sand layer, is high in applicability, and is easy to popularize and apply.

Description

technical field [0001] The invention relates to the technical field of geological disaster detection and monitoring, in particular to a method for monitoring hidden dangers of ground subsidence in shallow sand layers. Background technique [0002] With the rapid development of urban construction and the large-scale development of underground space, the distribution of underground pipelines is dense, and the maintenance of old pipelines is weak. In shallow sand distribution areas, once underground pipelines leak, it is easy to produce quicksand and cause ground subsidence. the occurrence of disasters. Ground subsidence refers to a geological phenomenon in which the overlying rock layer is damaged, the rock and soil mass subsides or collapses in the underground cavity, and forms collapse pits of different shapes on the surface. In the subsidence area, there are often several cracks surrounding the subsidence pit, forming annular or arc-shaped cracks of different sizes. [00...

AI Technical Summary

Problems solved by technology

[0005] The above existing technical solutions have the following defects: most of them are applied in the macro region, but there are still certain limitations. For example, the subsidence prediction and forecast on the macro region is highly subjective in the selection of evaluation factors, weight assignment, etc., and its accuracy Not high; or the calculation method is too complicated, or the optical cable needs to be embedded in advance, the generalization is not high, and it is not suitable for promotion and practical application

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