Method for detecting underground pipe gallery

Abstract

The invention relates to a method for detecting an urban underground pipe gallery, comprising the following steps: Step 1, uniformly arranging a plurality of seismic wave collecting device groups along the pipe gallery on the ground above a to-be-detected area of the urban underground pipe gallery, wherein each seismic wave collecting device in the seismic wave collecting device groups is a sampling point in the collecting area; step 2, collecting seismic wave signals received by seismic wave collecting device groups at each collecting point of each collecting area; step 3, performing cross-correlation calculation by using the seismic wave signals of each collecting point in each collecting area; Step 4, calculating the corresponding empirical Green's function; Step 5, extracting the surface wave dispersion curve; Step 6, decomposing the fundamental mode and the higher-order mode of the dispersion curve; Step 7, obtaining a corresponding speed profile of the to-be-detected area; Step 8, determining the location of the pipe gallery. According to the method for detecting an urban underground pipe gallery, the urban underground pipe gallery can be conveniently and efficiently detected.

Description

technical field [0001] The invention relates to the technical field of engineering geophysical prospecting, in particular to a method for detecting urban underground pipe galleries. Background technique [0002] Urban underground utility corridors are the bottleneck of urban construction and development, and the basic guarantee for the normal operation of modern cities. With the continuous acceleration of the urbanization process, in the urban underground pipe corridors currently used in my country, earth-shaking changes have taken place in terms of pipeline materials, laying methods, and the number of pipelines. Due to geographical factors and historical reasons, the situation of "old", "dense" and "chaos" of urban underground pipe corridors is becoming more and more serious. The backward pipe gallery management methods and the gap between the existing pipe gallery detection technology and the rapid urban development Contradictions are also becoming increasingly acute. On...

AI Technical Summary

Problems solved by technology

However, these methods have their own shortcomings: the electromagnetic induction method and the ground radar method have better detection effects on metal pipelines, and poorer detection effects on non-metallic pipelines, especially PE pipes, which are widely used now. The seismic imaging method is easily affected by surrounding human activities, and the high-density electrical method is easily affected by the underground environment. It is difficult to obtain more accurate location information of the pipe gallery, which cannot meet the actual production needs.

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