Seismic refraction wave exploration method for cross section of river bed and device thereof

Abstract

The invention discloses a seismic refraction wave exploration method for a cross section of a river bed and a device thereof. The method comprises the following steps that: impulse points are arranged along the cross section of the river bed at equal intervals, the manual impulse is sequentially carried out on each impulse point, seismic waves generated in the manual impulse process are converted into refracted waves after being refracted by a bedrock surface of the river bed, and the refracted waves are received by transducers on banks at both sides and are recorded by engineering seismographs; and propagation time data of two groups of refracted waves recorded by the transducers on both the banks and the positions of the impulse points are calculated and processed to obtain the thickness of a coverage layer of the cross section of one section of river bed. According to the invention, a buoyant cable with the unit price of 150,000RMB does not need to be used, so that the exploration cost is greatly saved. In the exploration process, the cable is sunk at the river bottom and does not influence the navigation of ships, and thus, in the exploration process, the shipping suspension does not need to be carried out. Steel wires do not need to be hung under the complex hydrologic condition, and thus, the exploration is safe to carry out and is not influenced by the width of the river surface.

Description

technical field [0001] The invention relates to a riverbed cross-section seismic refraction wave exploration method and a device thereof, belonging to the technical field of riverbed exploration. Background technique [0002] In hydropower and water conservancy projects and bridge surveys, the seismic refraction wave survey method is often used to find out the thickness of the covering layer on the cross-section of the riverbed. The observation method is generally to hang the transducer on the river surface by drawing a steel wire or using a floating cable to connect the transducer, and then A method of shocking at the endpoints on both sides of the profile. However, when the river surface is too wide, the method of drawing steel wires will cause the steel wires to fail to straighten, which will affect the seismic exploration effect. In addition, hanging steel wires under complex hydrological conditions also brings great safety hazards, and navigation must be prohibited dur...

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Problems solved by technology

Therefore, the existing riverbed cross-sec

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