Rock mass RBI and RQD index measuring method

Abstract

The invention relates to the field of rock mass analysis, and provides an RQD and RBI based rock mass structural characteristic analysis method. An engineer can rapidly analyze a rock mass at a designated zone. The method comprises the steps that piles are arranged on an adit every one meter, and the piles are numbered in sequence; the rock mass between every two adjacent piles is adopted as a measuring unit, and the length of the rock mass at the 1-meter band course position inside each measuring unit is measured and recorded in sequence; an electronic spreadsheet is used for storing rock mass length data larger than or equal to 3 cm; the electronic spreadsheet stores data according to M rows and N columns, wherein M is determined by the starting and ending pile numbers of the adit, N is equal to 24, the first column is a pile number row, the 22nd-24th columns are XX+,+XX+ and +XX columns, and the XX+,+XX+ and +XX columns are used for storing data of crossing units; a calculation program is opened for performing RQD or RBI analysis. The method is applicable to adit rock mass analysis.

Description

technical field [0001] The invention relates to the field of rock mass analysis, in particular to a method for measuring RBI and RQD indexes of rock mass. Background technique [0002] Rock mass structure is an important controlling factor that restricts the mechanical characteristics of rock mass and affects the quality of rock mass, especially for rock masses controlled by random hard structural joints, such as quartz diorite and granite. Rock quality index (RQD) and rock mass index (RBI) are the main commonly used indicators to characterize the structural characteristics of rock mass. In practical engineering applications, they have the characteristics of simple test, simple method, and intuitive data, and are widely used at home and abroad. [0003] In the application process of RQD in various rock mass engineering, various experts and scholars have conducted a lot of research and exploration on it. There are mainly two methods in the RQD statistical method. 1. The tradi...

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Problems solved by technology

[0006] During the existing calculation and analysis, there is a lot of repetitive work in the measurement and statistics of rock quality index (RQD) and rock mass index (RBI)

At the same time, the cave wall has great undulations. Generally, the steel tape should be close to or attached to the cave wall when measuring. The measuring line will be bent along the cave wall, resulting in the last measurement point where the sum of the distances between the structural surfaces of each meter section is 1m. There is a deviation between the position and the position of the pile number mark per meter, and the horizontal positioning error of the survey line is relatively large, resulting in a discrepancy between the structural surface spacing and the actual situation, resulting in a large error in the rock mass blockiness index

[0007] When performing statistical calculations on RQD and RBI data, the adjustment of the section will lead to repeated calculation of the data. During the calculation, it is necessary to re-adjust the parameters of the formula before calculating. When adjusting the parameters, it is necessary to have a correct understanding of RQD and RBI. One of them The parameters are not adjusted or adjusted incorrectly and affect the final calculation and evaluation results, and the inspection is difficult, the repeatability of the calculation method is poor, the error rate is high, and the efficiency of data statistics is low

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