Method for determining mechanical parameters of stratum via Rayleigh wave speed

A technology of Rayleigh surface wave and mechanical parameters, which is applied in the field of geotechnical engineering survey, can solve problems such as not being intuitive enough, affecting the application of Rayleigh surface wave, and single geological information, so as to improve work efficiency, achieve reasonable and effective results, and reduce costs Effect

Active Publication Date: 2016-06-15
POWERCHINA HEBEI ELECTRIC POWER SURVEY & DESIGN INST CO LTD
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Problems solved by technology

In fact, the hidden information in Rayleigh surface waves is very rich, but the information extracted by the current exploration method using Rayleigh surface waves is limited, and the geological information reflected is too simple and not intuitive enough, which affects the geological information of Rayleigh surface waves. Applications in Surveying Fields

Method used

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  • Method for determining mechanical parameters of stratum via Rayleigh wave speed
  • Method for determining mechanical parameters of stratum via Rayleigh wave speed
  • Method for determining mechanical parameters of stratum via Rayleigh wave speed

Examples

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Embodiment 1

[0057] The following is the testing process of wind position F17 of Guodian Wuqi Zhouwan Phase I 49.5MW Wind Farm Project. In the loess area of ​​northern Shaanxi, the geological conditions are relatively simple, but the topographical undulations and height differences are large, and many locations are difficult to reach.

[0058] Firstly, according to the purpose of exploration, the Rayleigh surface wave survey line is laid out, completely covering the detection area, so that enough information can be collected. Then the seismic source is excited, and the Rayleigh surface wave is generally excited by hammering the seismic source, and the excitation is repeated several times to ensure that the information collected by the geophone has a high signal-to-noise ratio. By analyzing the information collected by the geophone, the dispersion curve of the Rayleigh surface wave (that is, V R -f curve).

[0059] According to the relationship between the Rayleigh wave velocity and the s...

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Abstract

The invention discloses a method for determining mechanical parameters of the stratum via the Rayleigh wave speed. According to the method, information from Rayleigh wave exploration is fully utilized, the mechanical parameters of the stratum in geotechnical engineering are inverted according to the Rayleigh wave speed, comparative verification is carried out by combining drilling data, shearing wave speed and indoor geotechnical test, the different mechanical parameters of the stratum are determined via the Rayleigh wave speed, and reference values of stratum mechanical indexes and stratigraphic division are provided for exploration in geotechnical engineering without drilling and pitting data. The method of the invention is efficient, economical and practical, a lot of drilling and pitting work can be reduced, the method is especially suitable for landform and geologic positions which a drilling machine can hardly reach, a result is reasonable and effectively, the working efficiency is greatly improved, the cost is reduced, and an effective solution is provided to determine the mechanical parameters in geotechnical engineering of the stratum.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering investigation, and in particular relates to a method for inverting various geotechnical engineering mechanical parameters of formations by using Rayleigh surface wave velocity. Background technique [0002] Rayleigh surface wave is a very effective seismic exploration method in the study of the earth's internal structure and various engineering exploration problems near the surface, especially in the acquisition of near-surface strata structure and attribute characteristics. Since the Rayleigh surface wave is closely related to the shear wave velocity, the shear wave velocity is retrieved by extracting the dispersion curve of the Rayleigh surface wave, and then information such as stratigraphic structure and structure can be obtained to achieve the purpose of exploration. In fact, the hidden information in Rayleigh surface waves is very rich, but the information extracted by the current exp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
CPCG01V1/284
Inventor 习建军崔丹丹刘力铖
Owner POWERCHINA HEBEI ELECTRIC POWER SURVEY & DESIGN INST CO LTD
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