Subway shield interval boulder detection resistivity data fusion three-dimensional imaging method
A subway shield and data fusion technology, applied in geophysical surveying, measuring devices, electrical/magnetic exploration, etc., can solve the problem of not being able to have a good reflection of the distribution range of boulders, false anomalies in inversion imaging, and not being able to reflect isolated rocks. Stone distribution and other issues
Active Publication Date: 2020-10-23
SHANDONG UNIV
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[0004] According to the knowledge of the inventors, conventional geophysical methods for boulders in front of the shield machine include ground-penetrating radar method, high-density electrical method, cross-hole resistivity CT method, etc. False anomalies are generated, or the distribution range of boulders cannot be well reflected, so joint imaging of multiple geophysical methods is very necessary, and conventional imaging is often two-dimensional, which cannot reflect the distribution of boulders in space
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[0030] The present disclosure will be further described below in conjunction with the accompanying drawings and embodiments.
[0031] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
[0032] It should be noted that the terminology used herein is only for describing specific embodiments, and is not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.
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The invention provides a subway shield interval boulder detection resistivity data fusion three-dimensional imaging method, which comprises the steps of obtaining cross-hole CT and high-density electrical method geophysical prospecting original data of a subway shield interval, and obtaining a cross-hole CT and high-density electrical method two-dimensional resistivity profile after inversion of the two kinds of original data; extracting cross-hole CT and high-density electrical method data at the same position, and fusing the two kinds of data by using a principal component analysis method; and carrying out resistivity data two-dimensional imaging to obtain a plurality of resistivity data two-dimensional profile maps, and converting two-dimensional coordinates into three-dimensional coordinates to form a three-dimensional model map. According to the method, the distribution condition of a boulder group in a three-dimensional space can be better described, the relevance among the boulders is more obvious, and a guarantee is provided for safe construction and smooth development of shielding.
Description
technical field [0001] The disclosure belongs to the technical field of advanced tunnel prediction, and relates to a three-dimensional imaging method for fusing resistivity data of boulder detection in a subway shield section. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] With the rapid development of the urban rail transit industry, the subway has ushered in unprecedented opportunities and development climax. Shield tunneling technology has gradually become an important means of subway construction due to its advantages of fast tunneling speed and high degree of automation. However, shield tunneling technology Poor adaptability to strata, encountering unexplored distribution of boulders during long-distance excavation, which may cause cutter head jamming, deformation or rapid wear in mild cases, and cause tunnel surface collapse in sev...
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IPC IPC(8): G01V3/38
CPCG01V3/38
Inventor 苏茂鑫刘轶民薛翊国程凯曲传奇
Owner SHANDONG UNIV