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Method for quickly determining rock cutting strength and anti-cutting strength indexes

A cutting strength and index technology, applied in the field of geotechnical engineering, can solve the problems of mechanical index distortion, poor representation, time-consuming and labor-intensive, etc., to achieve the effect of simple calculation process, saving survey costs, and simplifying survey procedures

Active Publication Date: 2018-11-30
XIAN UNIV OF TECH
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AI Technical Summary

Problems solved by technology

The blindness and unscientific nature of the empirical analogy method are becoming more and more serious, which seriously "distorts" the obtained mechanical indexes; while the existing field test method is very time-consuming, laborious and expensive, and has poor representativeness

Method used

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  • Method for quickly determining rock cutting strength and anti-cutting strength indexes
  • Method for quickly determining rock cutting strength and anti-cutting strength indexes
  • Method for quickly determining rock cutting strength and anti-cutting strength indexes

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] The invention discloses a method for quickly determining the rock cutting strength and cutting resistance strength index. The method mainly measures the mechanical parameters of the triangular drill bit during the rock drilling process, including drilling pressure, rotational torque, rotational speed and drilling speed. Relevant theoretical formulas are used to calculate the rock cutting strength and anti-cutting strength index of the rock, so as to achieve the purpose of fast and accurate measurement. Such as figure 1 As shown, the specific steps are as follows:

[0026] Step 1. Carry out the site rotary penetration test on the rock, and obtain the rotary penetration test data:

[0027] The geotechnical engineering in-situ rotary penetrating vehicle is used to carry out the rotary penetrating sounding site test at the foundation of ...

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Abstract

The invention discloses a method for quickly determining rock cutting strength and anti-cutting strength indexes. The method is implemented specifically according to the following steps that 1, fieldgyration penetration testing is conducted on rock, and thus gyration penetration data are obtained; 2, the data obtained in the step 1 are processed, and thus the mean values of gyration penetration drilling parameters of all strata are obtained and comprise the mean value of gyration torque and the mean value of drilling pressure; and 3, the cutting strength and anti-cutting strength indexes of all the strata in the rock are calculated through the drilling parameters obtained in the step 2. The method is adopted to calculate basic cutting strength, calculation parameters of the basic cuttingstrength only need to be from the field gyration penetration test, drilling is not needed, the influences of traditional drilling sampling and indoor geotechnical testing on disturbance of a foundation soil mass and inaccurate test results can be avoided, the reconnaissance procedure is simplified, the reconnaissance cost is lowered, and application prospects are broad.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and specifically relates to a method for quickly determining rock cutting strength and cutting resistance strength indexes. Background technique [0002] Quickly and accurately obtaining mechanical parameters of various engineering rock masses is a key issue in the design and construction of various rock mass engineering. At present, there are mainly two ways to obtain rock mass mechanical parameters, one is empirical analogy method; the other is field test. The blindness and unscientific nature of the empirical analogy method are becoming more and more serious, which seriously "distorts" the obtained mechanical indexes; while the existing field test method is very time-consuming, laborious and expensive, and has poor representativeness. Contents of the invention [0003] The purpose of the present invention is to provide a method for quickly determining rock cutting strength ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
CPCE21B49/003
Inventor 李宁何明明宋玲李骞
Owner XIAN UNIV OF TECH
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