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Rock mass structure quantitative description method

A technology of rock mass and structural characteristics, applied in the field of quantitative description of rock mass structure, can solve problems such as insufficient reflection of rock mass structure, and achieve the effect of simple measurement method and simple calculation method

Inactive Publication Date: 2018-11-27
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] To sum up, at present, there are many quantitative indicators in the quantitative description of rock mass structure characteristics, but there are still deficiencies in accurately reflecting rock mass structure, and further development of rock mass structure quantitative indicators is needed.

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Embodiment 1

[0056] Pingdong PDZ05 on the left bank of a hydropower station in Tibet, the depth of the cave is 131m, and the lithology is granite. According to the differences in rock mass structure characteristics, it is divided into 11 engineering geological segments. The distance between cracks in the whole tunnel section was systematically measured, including three directions along the extension direction of the flat tunnel, vertical tunnel wall and horizontal tunnel roof. See Table 1 for the segmental description of engineering geology and the calculation results of the main quantitative indicators. For the comparison of quantitative indicators, see figure 2 , it can be seen that the rock mass structure characteristics of each section are different, and the RSI value is different. If the rock mass integrity is good, the RSI value is relatively large; the comparison shows that the RSI value is more obvious than the RQD and RBI, reflecting the difference in the rock mass structure char...

Embodiment 2

[0061] Pingdong PDZ03 on the left bank of a hydropower station in Tibet, the depth of the cave is 178m, and the lithology is granite. According to the differences in rock mass structure characteristics, it is divided into 12 engineering geological segments. Systematic measurements were made on the distance between cracks in the entire tunnel section, including two directions along the extension direction of the flat tunnel and the vertical direction of the tunnel wall. See Table 2 for the segmental description of engineering geology and the calculation results of the main quantitative indicators. See Table 2 for the comparison of quantitative indicators. image 3 , it can be seen that the rock mass structure characteristics of each section are different, and the RSI value is different. If the rock mass integrity is good, the RSI value is relatively large; the comparison shows that the RSI value is more obvious than the RQD and RBI, reflecting the difference in the rock mass str...

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Abstract

The invention discloses a rock mass structure quantitative description method. The method adopts a rock mass structure index RSI to finely reflect a rock mass structure characteristic; a rock mass structure index RSI calculation formula is as follows: RSI=5DS5+10DS10+15DS15+20DS20+25DS25+30DS30+40DS40+50DS50+75DS75+100DS100. In the formula: the RSI is the rock mass structure index, and the unit iscm; the DS5 is the proportion of the cumulative spacing measurement value of the crack spacing between both sides of a complete rock block, being not less than 5cm within a measuring line range, %; and the DS10 is the proportion of the cumulative spacing measurement value of the crack spacing being not less than 10cm within the measuring line range, and the rest are similar. The analysis shows that RSI can quantize and reflect rock mass structural features easily, quickly and relatively accurately, and is used to evaluate the rock mass integrity and rock mass quality evaluation.

Description

technical field [0001] The invention relates to a quantitative description method of rock mass structure, which belongs to the fields of hydrogeology and engineering investigation. The present invention is to quantitatively describe the structural features of the rock mass so as to analyze the engineering geological features of the rock mass, the structure type and integrity of the rock mass, the quality evaluation of the rock mass and the analysis of the physical and mechanical parameters of the rock mass. It is especially suitable for fine description of rock mass engineering characteristics such as slopes, dam foundations, and surrounding rocks of caverns in large-scale hydropower projects and traffic projects in mountainous areas. Background technique [0002] Rock mass is a geological body gradually formed in the process of construction and transformation, thus forming a large number of structural planes with different genetic types and characteristics, and rock mass ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/18
CPCG06F17/18
Inventor 李鹏飞林峰吴述彧王晓朋周红喜朱代强易魁陈鸿杰肖明东
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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