Ultra-hysteresis dipole transverse wave source

Abstract

The invention relates to the field of environmental geotechnics, and particularly relates to an ultra-hysteresis dipole transverse wave source in the field of engineering geophysical logging. The ultra-hysteresis dipole transverse wave source is characterized by comprising an emitter and a receiver, wherein a sound insulation pipe is arranged between the emitter and the receiver; the shell of the emitter and the shell of the receiver are internally respectively provided with two ultra-hysteresis plates which are made of ultra-hysteresis materials and are consistent in direction and identical in specification; and coils which are wound in the opposite direction and has the same turns are arranged on the two ultra-hysteresis plates. The ultra-hysteresis dipole transverse wave source provided by the invention has the advantages of small volume, wide bandwidth, large transmitting power, favorable anti-interference characteristic, favorable signal repeatability, short aftershock, long penetrating distance and the like, and is convenient for installation and suitable for the operation of the transverse wave logging in the field of the environmental geotechnics. The emission frequency of the ultra-hysteresis dipole transverse wave source can be adjusted according to the external voltage.

Description

technical field [0001] The invention relates to the field of environmental geotechnical engineering, in particular to a hyperhysteresis dipole shear wave seismic source in the field of engineering object detection wells. Background technique [0002] Since the shear wave velocity of rock and soil can better reflect the dynamic characteristics of the site rock and soil, the engineering mechanical properties of the site soil, and the actual engineering conditions of the site soil, so (GB50011-2001) "Code for Seismic Design of Buildings", (GB50021-2001) " The Geotechnical Engineering Survey Specifications all use the shear wave velocity of the site soil as the criterion for discrimination and evaluation of the site's seismic category, saturated soil liquefaction potential, and rock weathering grade. The site soil shear wave velocity test has become a mandatory clause stipulated in the code. Before the present invention, the three-component wave velocity probes used in engineer...

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Problems solved by technology

This test method has the following problems: one is that the hammering does not produce pure shear waves, which contain other wave velocity components such as compression waves, which greatly interferes with the test of shear waves; It is relatively poor, and the propagation depth is greatly affected by the testers; the third is that the shear wave passes through strata of different properties before reaching the three-component wave velocity probe, and each stratum interferes and attenuates the propagation of the shear wave, reducing the quality of the signal; Fourth, this test method is relatively primitive, requiring at least three people to cooperate with each other, wasting a lot of manpower and material resources

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