Non-destructive detection method based on micro-motion three-component spectral ratio VHSR and application

Abstract

The invention is a non-destructive detection method based on a micro-motion three-component spectral ratio VHSR and application. The method includes the following steps: S1, collecting a surface micro-vibration signal of a two-dimensional array; S2, calculating VHSR curves of data collected by all three-component detectors; S3, processing the VHSR curves of all measurement points by a self-developed MATLAB program to form two-dimensional VHSR curve contour maps or 3D slice maps; and S4, deducing and explaining an abnormal target body based on the abnormal features of the two-dimensional VHSR curve contour maps or 3D slice maps. The method is applied to detection of underground obstacles or bad geology impacting on engineering construction, such as pile foundations, caps, pipelines, artificial rockfills, hollows, and weak interlayers, within the shallow surface or overburden depth range in urban engineering construction. Therefore, the distribution range of underground obstacles and unfavorable geology can be checked accurately; the potential risks in the urban engineering construction like the shield and pipe jacking can be discovered in advance; and the major construction accidents can be avoided. The method has the great significance.

Description

technical field [0001] The invention relates to an engineering geophysical detection method, in particular to underground obstacles affecting engineering construction such as pile foundations, caps, pipelines, artificial rock filling, cavities, and weak interlayers within the depth range of shallow ground or covering layers in urban engineering construction. Non-destructive detection method and application based on micro-motion three-component spectral ratio VHSR for object or bad geological detection. Background technique [0002] In urban engineering construction, pile foundations, caps, pipes, artificial rock filling, cavities, weak interlayers, etc. within the shallow surface or the depth of the covering layer often affect or harm the engineering construction. For example, if an unexplored pile foundation is encountered during the tunneling of the shield machine, it will often seriously damage the shield machine, and even cause accidents such as spewing and landslides; w...

AI Technical Summary

Problems solved by technology

Commonly used to detect obstacles, such as ground penetrating radar, in southern cities with shallow groundwater levels, the signal attenuation is fast, the detection depth is limited, and at the same time, it is also affected by electromagnetic interference, so the effect is often not ideal; various cross-hole CT methods have certain effects. However, the effects of different methods between the holes are not the same, and are affected by the hole spacing, not only the cost is high, but the construction period is long

In general, many geophysical methods fail to achieve the expected results in the complex urban environment

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