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Evaluation method for representitiveness of rock structural fece sample

An evaluation method, representative technology, applied in the direction of testing material strength by applying stable shear force, mechanical roughness/irregularity measurement, special data processing application, etc., can solve the problem that the shear strength value of direct shear test cannot be determined Problems such as the relationship between shear strength values, to achieve maximum implementation value and social and economic benefits, good use effect, and simple principle

Inactive Publication Date: 2006-08-09
ZHEJIANG COLLEGE OF CONSTR
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Problems solved by technology

[0004] The purpose of the present invention is to solve the shortcoming of being unable to determine the relationship between the shear strength value of the direct shear test and the shear strength value of the in-situ rock mass structural surface due to the absence of a representative evaluation method for the structural surface sample of the direct shear test, and to provide a The principle is simple, the operation is convenient, the cost is low, the use effect is good, and it is convenient to evaluate the representative method of the direct shear test specimen of the structural surface with non-uniform shear strength

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  • Evaluation method for representitiveness of rock structural fece sample
  • Evaluation method for representitiveness of rock structural fece sample
  • Evaluation method for representitiveness of rock structural fece sample

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Embodiment Construction

[0013] The test directions were calibrated on the selected rock mass structural surface samples (the granite NEE joint of Tianhuangping Pumped Storage Power Station 20cm×20cm) and the in-situ rock mass structural surface (the field granite NEE joint), so that the rock mass structural surface The measurement direction of the roughness coefficient of the sample and the in-situ rock mass structural surface is consistent; according to the calibrated direction, the rock mass structural surface sample (the granite NEE group joint of Tianhuangping Pumped Storage Power Station 20cm×20cm) is in the test direction , The 16 contour curves of the bottom wall are used for the directional statistical measurement of the roughness coefficient, and the roughness coefficient characteristic value JRC of the rock mass structural surface sample is obtained 0 =6.97; On the in-situ rock mass structure (NEE joints of field granite), along the calibration direction, according to the length of the rock mas...

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Abstract

Present invention relates to a rock mass structure surface test sample representativity evaluation method. It includes following steps: calibrating test direction respectively on selected rock mass structure surface test sample and in situ rock mass structure surface to make rock mass structure surface test sample direction concordance with in situ rock mass structure surface roughness coefficient measurement, to proceed orient statistics measuring to rock mass structure surface test sample according to calibrating direction to obtain rock mass structure surface test sample roughness coefficient eigenvalue JRC 0, uniformly distributing not less than 30 strip measuring line along calibrating direction according to rock mass structure surface test sample length, to proceed orient statistics measuring to obtain sample size in situ rock mass structure surface roughness coefficient eigenvalue JRC 0 * evaluating structural plane test sample representativity by k=|JRC 0-JRC 0 * | / JRC 0 *. If K=0-0.15, means fine structural plane test sample representativity, if K=0.15-0.4, means better structural plane test sample representativity, if K=0.4-0.7, means intermediate structural plane test sample representativity, if K=0.7-1, means bad structural plane test sample representativity, if K>=1, means very bad structural plane test sample representativity.

Description

(1) Technical field [0001] The invention relates to a representative evaluation method of a structural surface sample in a direct shear test, which is suitable for the occasion where a rock mass structural surface with non-uniform shear strength is evaluated for the representative structure surface sample during the direct shear test result analysis. (2) Background technology [0002] Before the present invention was made, there was currently no representative evaluation method for structural surface samples in direct shear test. The shear strength of the structural surface of rock mass has the characteristics of non-uniformity. The shear strength value obtained by arbitrarily selecting the structural surface sample for direct shear test cannot objectively represent the shear strength value of the in-situ rock mass structural surface, because there is no structural surface. The representative evaluation method of the sample cannot evaluate the representativeness of the structural...

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Application Information

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IPC IPC(8): G01N19/00G01N3/24G01B5/28G06F19/00
Inventor 杜时贵胡晓飞
Owner ZHEJIANG COLLEGE OF CONSTR
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