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A Numerical Discrimination Method for Rock Mass Weathering and Unloading

A discrimination method and rock mass technology, applied in the numerical discrimination of unloading and rock mass weathering, can solve the problems of difficult compressive strength test, poor practicability, less research on the interface relationship between weathering zone and unloading zone, etc., to achieve Avoid artificial differences and arbitrariness, simple operation, and less demanding working environment conditions

Active Publication Date: 2022-05-17
YELLOW RIVER ENG CONSULTING
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Problems solved by technology

[0012] Due to the qualitative judgment of weathering and unloading of rock mass and the division of weathering zone and unloading zone, due to differences in the experience of surveyors and the mastery of evaluation standards, different zoning levels will be obtained, and there will inevitably be evaluations. In addition, in the current quantitative division method of rock mass weathering zone and unloading zone, there are few studies on the interface relationship between weathering zone and unloading zone. The weathering coefficient is mainly calculated based on the saturated compressive strength, but the compressive strength test is difficult to carry out in the field, so the practicability of the quantitative standard of the weathering coefficient is poor

Method used

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  • A Numerical Discrimination Method for Rock Mass Weathering and Unloading
  • A Numerical Discrimination Method for Rock Mass Weathering and Unloading
  • A Numerical Discrimination Method for Rock Mass Weathering and Unloading

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Embodiment Construction

[0047] The present invention will be described in more detail below in conjunction with the accompanying drawings.

[0048] Rock mass weathering of the present invention, the numerical discrimination method of unloading comprise the following steps:

[0049] 1. Rock Mass Acoustic Test

[0050] In the exploration tunnel excavated by geological survey, the acoustic wave instrument is used to test the acoustic wave on the rock mass of the tunnel wall; the testing method adopts the surface acoustic wave detection flat measurement method:

[0051] The sound wave test line is arranged along the waistline 1 of the tunnel wall, and on the waistline 1 of the tunnel wall, a sound wave test point 3 is arranged every two meters, and the test points 3 are numbered, and the position of each number is recorded, such as figure 1 shown;

[0052] The transducer is used to excite, and the transmitting and receiving transducers are aligned with the test point in turn, that is, the distance betw...

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Abstract

The invention discloses a numerical discrimination method for weathering and unloading of rock mass, which comprises arranging sound wave test points and rebound test areas respectively along the waistline from the mouth of the tunnel to the bottom of the tunnel, The longitudinal wave propagation velocity of the rock mass is tested by the instrument, and the rebound value of the rock is tested by the rebound instrument in the rebound test area; no matter whether the rock mass is weathered or unloaded, there is a difference in the longitudinal wave velocity, but there is a difference in the rebound value of the weathered rock mass ; and there is no grade difference in the rebound value of the unloaded rock mass; and the combination of these two parameters can determine whether the rock mass is weathered or unloaded and the degree of weathering and unloading. The invention has the advantages of simple operation, low requirements on field conditions, rapid acquisition of rock mass data, and quantitative evaluation of engineering geological problems.

Description

technical field [0001] The invention relates to the weathering and unloading of rock mass foundations and rock slopes, in particular to a numerical discrimination method for rock mass weathering and unloading. Background technique [0002] Water conservancy and hydropower projects often involve rock foundations and rock slopes. Under natural conditions, weathering and unloading will cause rock mass to break, which has a significant impact on construction projects. [0003] Rock weathering is the process of continuous physical and chemical changes of rocks under the action of various weathering stresses such as solar heat, atmosphere, moisture and organisms. This geological process that causes rocks to break up and even break down is called weathering. Weathering can change the properties of rocks, and the color, structure, mineral composition and physical and mechanical properties of rocks will change after weathering. [0004] Generally speaking, the closer to the surface...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F119/14
CPCG06F2119/06G06F30/20
Inventor 李雷王贵军张一张瑞洵陈艳国高旭辉牛贝贝陈利李文雅
Owner YELLOW RIVER ENG CONSULTING
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