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Q anisotropy solving method based on RQD and RQDt anisotropy

An anisotropy and variance technology, applied in the field of Q anisotropy solution based on RQD and RQDt anisotropy, can solve the problem that the anisotropy solution method has not yet been obtained, cannot reflect RQD anisotropy, and has not obtained anisotropy calculation formula etc.

Inactive Publication Date: 2021-03-09
SHAOXING UNIVERSITY
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Problems solved by technology

Deer proposed the concept of borehole RQD in 1964. Due to the following two shortcomings in the application of borehole RQD: whether the threshold value of 100 mm is reasonable for different engineering scale rock masses; the drilling direction of the borehole is limited, and the obtained RQD can only reflect local rock mass conditions, but cannot reflect RQD anisotropy
[0010] The anisotropy of RQD directly affects the quality of the rock mass, and the mechanism of the influence of RQD anisotropy on the quality of the rock mass has not yet been explored clearly
In terms of the threshold t, no scholars have given the calculation method of the optimal threshold t, so the RQD based on the optimal threshold t has not been obtained. t Anisotropy calculation formula, and the RQD that can best reflect the quality of rock mass has not yet been obtained t Anisotropy solution method

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  • Q anisotropy solving method based on RQD and RQDt anisotropy
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  • Q anisotropy solving method based on RQD and RQDt anisotropy

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Embodiment Construction

[0154] The present invention will be further described below with reference to the accompanying drawings.

[0155] refer to Figure 1 ~ Figure 4 , a based on RQD, RQD t Anisotropic Q anisotropy solution method, including the following steps:

[0156] 1) Calculation of rock mass quality based on RQD index, the process is as follows:

[0157]1.1: Select the rotary drilling method according to the geotechnical category and survey requirements;

[0158] 1.2: Using 75mm caliber N-type double-layer core tube and diamond drill bit, the drilling caliber and drilling tool specifications comply with the current national standards, and the hole caliber meets the requirements of sampling, testing and drilling technology;

[0159] 1.3: According to the designed drilling position, the handheld GPS measurement is used for field positioning. After the drilling is completed, the GPS is used for formal and accurate measurement;

[0160] 1.4: During the drilling process, a measurement is car...

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Abstract

A Q anisotropy solving method based on RQD and RQDt anisotropy belongs to the field of Q anisotropy solving, and comprises the following steps: (1) making rock mass quality calculation based on RQD indexes; (2) generating and sectioning a rock mass three-dimensional fracture network model; (3) drawing an RQDt anisotropy diagram; (4) arranging an optimal threshold t solving method based on RQD inversion; (5) arranging an RQDt anisotropy solving method; and (6) arranging a Q anisotropy solving method. An RQD theory, a fracture network model, a generalized RQD theory and inversion calculation arecombined, the optimal threshold t and anisotropy of RQDt are solved, Q anisotropy is solved, and the Q anisotropy solving method based on RQD and RQDt anisotropy is provided. The method is clear, andis suitable for anisotropy solution of the rock mass Q.

Description

technical field [0001] The present invention relates to a kind of based on RQD, RQD t Anisotropic Q anisotropy solution method, especially the present invention is based on RQD index, crack network model and generalized RQD theory, inversion calculates RQD t The range of optimal threshold t and the optimal threshold t value, gives the RQD t Anisotropic solution method, and based on RQD t Anisotropy, gives the solution method of Q anisotropy, provides a method based on RQD, RQD t The method for solving anisotropic Q anisotropy belongs to the field of solving Q anisotropy. Background technique [0002] The appearance and quality of the rock mass strongly depend on the degree of anisotropy of the rock mass, and the stability of the rock mass is determined by the quality of the rock mass. Some geological phenomena have also proved this point. For example, during the excavation process of a roadway or expressway tunnel, non-perpendicular deformation and failure will occur al...

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Application Information

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IPC IPC(8): G06F30/20G06T17/00G06Q10/06
CPCG06Q10/06395G06T17/00G06F30/20
Inventor 胡高建
Owner SHAOXING UNIVERSITY
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