A method for measuring the equivalent shear wave velocity of the soil layer and the buried depth of the reflection interface of the soil layer

Abstract

The invention relates to a method for measuring the equivalent shear wave velocity of the soil layer and the burial depth of the reflection interface of the soil layer. The buried depth method of the soil reflection interface divides the seismic engineering geological units according to the seismic engineering geological conditions of the site; in the same seismic engineering geological unit, the shear wave velocity data of the soil layer is counted to establish the relationship between the shear wave velocity of the soil layer and the buried depth Mathematical model and its fitting parameters; Substituting the fitting parameters into the soil layer equivalent shear wave velocity calculation formula corresponding to the mathematical model of the relationship between soil layer shear wave velocity and buried depth, the equivalent soil layer of the earthquake engineering geological unit is obtained Shear wave velocity; Substituting the fitting parameters into the soil reflection interface burial depth calculation formula corresponding to the mathematical model of the soil layer shear wave velocity and burial depth relationship, the soil reflection interface burial depth is obtained, and the present invention improves the soil equivalent Convenience and measurement accuracy of shear wave velocity and soil reflection interface depth measurement.

Description

technical field [0001] The invention relates to the field of earthquake engineering, in particular to a method for measuring the equivalent shear wave velocity of the soil layer and the buried depth of the reflection interface of the soil layer. Background technique [0002] The equivalent shear wave velocity of the soil layer is one of the important parameters in earthquake engineering, which is mainly used for the classification of building sites, thus providing a basis for the seismic design of buildings. The buried depth of the reflection interface of the soil layer is one of the important results of seismic exploration, and it mainly serves to find out the underground geological structure (including active faults) and minerals. [0003] According to my country's current code for seismic design of buildings (GB 50011-2010), 2010), the site category of the building should be divided according to the equivalent shear wave velocity of the soil layer and the thickness of the...

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Problems solved by technology

[0010] Currently, v in formula (2) 0 There are few cases where the value of is directly derived from the borehole shear wave velocity test data. The reason is that there is no specific method to directly use the borehole shear wave velocity test data to measure the buried depth of the reflection interface of the shear wave reflection wave group in the soil layer.

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