Shallow abnormal body seismic detection device and the three-dimensional observation method thereof

Abstract

The invention belongs to the technical field of shallow seismic prospecting, and more particularly, to a shallow abnormal body seismic detection device and the three-dimensional observation method thereof. The device comprises a mobile carrier, a wave detector coupling device assembly, a seismic source activating device, a data acquisition base and a control terminal. The wave detector coupling device assembly comprises connection rods and rolling wheel type sensors. One end of one connection rod is mounted on the mobile carrier and the other end of the connection rod is connected with the rolling wheel type sensors or the other connection rods. According to the invention, it is possible to conduct more times of coverage over the targets under a detection point; and through the number and the direction of the connection rods, it is possible to adjust the distance from the rolling wheel type sensors to the seismic source and the distance between the rolling wheel type sensors so as to complete the simultaneous detection from a plurality of testing lines and therefore, the detection efficiency and detection precision can be increased greatly.

Description

technical field [0001] The invention belongs to the technical field of shallow seismic exploration, and in particular relates to a seismic detection device for shallow anomaly bodies using seismic waves and a three-dimensional observation method thereof. Background technique [0002] With the development of society and economy, the construction of urban viaducts and subway projects is increasing day by day. In the process of urban construction, common underground abnormalities include karst caves, loose layers, and boulders that affect construction, underground pipelines, underground rivers, civil defense projects, etc. These problems slow down the construction process, cause economic losses, and even lead to ground subsidence , life-threatening. [0003] At present, drilling and geophysical prospecting are common methods for ground detection. The advantage of drilling is that it can directly reflect the situation of the underground medium at the local drilling location, b...

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Problems solved by technology

[0008] The shortcomings of the shallow seismic wave method are: 1) The actual detection construction is mostly in the linear excitation and receiving observation mode. When the detection accuracy is high, the distribution density of the survey lines needs to be increased to increase the coverage of the underground target body, resulting in The project volume increases and the construction efficiency is low; 2) Due to many external interference factors, especially the large traffic flow of urban roads, and the ground is mostly asphalt or concrete roads, this situation leads to poor coupling of the geophone and low data acquisition quality ; 3) The excitation source is greatly affected by the ground conditions, the hammer force is uneven, and the source type is single, resulting in poor detection effect

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