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Rapid quantitative evaluation method of rock weathering degree and application thereof

A weathering degree and quantitative evaluation technology, which is applied in the direction of measuring devices, test material hardness, instruments, etc., can solve the problems that there is no quantitative judgment of the weathering degree of rock mass, and achieve low cost, fast speed and strong pertinence

Active Publication Date: 2018-09-28
CHENGDU UNIVERSITY OF TECHNOLOGY +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no quantitative index established directly based on the rebound value to quantitatively judge the weathering degree of rock mass.

Method used

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  • Rapid quantitative evaluation method of rock weathering degree and application thereof
  • Rapid quantitative evaluation method of rock weathering degree and application thereof
  • Rapid quantitative evaluation method of rock weathering degree and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0055] A method for rapid quantitative evaluation of rock mass weathering degree, specifically comprising the following steps:

[0056] Step 1: collection of test data, which specifically includes the following steps:

[0057] 1. Fresh rock rebound value (RH) measurement:

[0058] In the working area, the ZC3-A rebound tester is used to perform the rebound test on the relatively flat fresh rock section formed by rock excavation or the surface of the unrusted structure. On the fresh section formed by the excavation of the rock mass section, if there is no micro-new rock mass, select a large rock in the weakly weathered zone, and break it to the section where fresh rock can be seen for testing. The rebound value measuring point is required to be The thickness of the rock block in the hitting direction is not less than 10cm, and the distance from the measuring point to the side boundary is more than 3cm. The rock rebound value (RH) of different types of rocks is generally differ...

Embodiment 2

[0085] PDZ11 on the left bank of a hydropower station in Tibet, on the basis of qualitative judgment combined with norms, uses the rebound value and rock mass weakening rebound index to clearly complete the quantitative determination of rock mass weathering degree and zoning, as shown in Figure 1-3 shown. Based on the normative qualitative description, comprehensive rock rebound index and its standard deviation curve, steep crack weakening rebound index and slow crack weakening rebound index, it is determined that in PDZ11, from the entrance to the inside, 0-30m is the weakly weathered upper zone, 30 ~67m is a weakly weathered lower zone, and the 67m is a slightly new rock mass.

Embodiment 3

[0087] PDZ07 on the left bank of a hydropower station in Tibet, based on the qualitative judgment combined with the norms, used the rebound value and weakened rebound index to complete the quantitative determination of rock mass weathering degree and zoning, as shown in Figure 4-6 shown. Based on the normative qualitative description, comprehensive rock rebound index and its standard deviation curve, steep fracture weakening rebound index and slow crack weakening rebound index, it is determined that from the entrance to the inside of PDZ07, 0-26m is the weakly weathered upper zone, and 26-26m is the weakly weathered upper zone. The 117m is the weakly weathered lower zone, and the 117m is the slightly new rock mass.

[0088] In Example 2-3, a certain hydropower station in Tibet is located in the deep valley section of the upper reaches of the Lancang River, and is located in the southeast of the Qinghai-Tibet Plateau. The engineering geological conditions are very complicated, t...

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Abstract

The invention discloses a rapid quantitative evaluation method of a rock weathering degree and an application thereof. The method comprises the following steps: testing a fresh rock rebound value anda rock rebound value, calculating an attenuation rebound index, according to the measured different cave depth rock rebound values, the rock attenuation rebound index, and the structural surface attenuation rebound index, making a rebound characteristic change chart along a measuring line, performing a rock rebound value characteristic analysis of different weathering bands, dividing the weathering bands according to the determined rebound characteristic values of the different weathering bands, and performing quantitative determination of the rock weathering degree. The rock weathering degreeis subjected to quantitative determination by the rock rebound value and the change rate measured by a resiliometer, the quantification dividing of the rock weathering band is carried out, the measured index pertinency is strong, the measurement method is simple, the data processing is easy, cost is low, the speed is fast, normal construction is not interfered, and the evaluation method has wideapplication prospect in the fields of rock weathering degree quantitative evaluation of slope, dam foundation, and cave surrounding rocks in mountain area large-scale water power engineering and traffic engineering.

Description

technical field [0001] The invention relates to the fields of hydrogeological and engineering geological surveys, in particular to a rapid quantitative evaluation method for rock mass weathering degree and its application. Background technique [0002] Rock mass weathering is the natural destruction of rock by external forces, and is a common natural phenomenon. Rock mass weathering reduces the quality and stability of rock mass, and is one of the important factors affecting the engineering characteristics of rock mass. Changes in mineral composition and structural structure caused by rock weathering are extremely unfavorable to engineering activities, and more and more geological and engineering disasters are caused, such as the stability of building foundations, the stability of slopes, and the stability of surrounding rocks in caverns near slopes. Problems, etc. are all related to the weathering of the rock mass. Therefore, reasonably determining the weathering degree a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00G01N3/52
CPCG01N3/52G01N17/00
Inventor 林锋彭义史岩吴述彧李鹏飞卢吉陈鸿杰曹学兴赵富刚
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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