Method of Calculating Filling Ratio of Curtain Grouting Rock Mass Fissures Using Rock Mass Wave Velocity

Abstract

The invention provides a method for calculating the filling rate of curtain grouting rock mass cracks by using the rock mass wave velocity, which includes the following steps: step 1: deriving the calculation formula of the rock mass crack filling ratio after grouting by using the two-phase relationship of the rock mass; step 2, testing the The wave velocity data of the rock mass before the irrigation is sorted from small to large, and the number of each wave velocity data is counted, and the ratio of each wave velocity value is calculated; Step 3, use the rock mass wave velocity linear classification combined with the Poisson distribution probability density function to construct the rock mass wave velocity Poisson Loose distribution probability density formula, fit the wave velocity ratio data of the rock mass before irrigation, and obtain the rock mass wave velocity value in the work area; Step 4: Substitute each velocity parameter into the formula in Step 1 to calculate the rock mass fracture filling ratio. The invention only calculates the filling rate of rock mass cracks after curtain grouting in the hydraulic engineering according to the wave velocity values ​​of the rock mass before and after curtain grouting in the work area, which can not only provide quantitative indicators for evaluating the quality of curtain grouting, but also reduce the workload of on-site tests on the construction site and significantly improve the work efficiency. .

Description

technical field [0001] The invention relates to the technical field of engineering detection, in particular to a method for calculating the filling rate of curtain grouting rock mass fissures by using the rock mass wave velocity. Background technique [0002] At present, in the quality inspection of curtain grouting construction in hydropower projects, the regulations and specifications stipulate that the water permeability of the pressurized water test is used as the quantitative index, which has the disadvantage of a single index. [0003] The water pressure test involves a lot of equipment (drilling rig, water pump, water pressure instrument, pressure gauge, flow meter, etc.), long test time and high cost. In the actual detection work, geophysical detection will be assisted, but various geophysical detection methods usually detect the physical parameter values ​​(such as wave velocity, resistivity, etc.) of the medium (rock mass), which cannot be quantified as specific pa...

AI Technical Summary

Problems solved by technology

[0002] At present, in the quality inspection of curtain grouting construction in hydropower projects, the regulations and specifications stipulate that the water permeability of the pressurized water test is used as the quantitative index, which has the disadvantage of a single index

[0003] Pressure water test involves a lot of equipment (drilling rig, water pump, water pressure instrument, pressure gauge, flow meter, etc.), long test time and high cost

In the actual detection work, geophysical detection will be assisted, but various geophysical detection methods usually detect the physical parameter values ​​(such as wave velocity, resistivity, etc.) of the medium (rock mass), which cannot be quantified as specific parameters of grouting construction quality, and can only be used as an auxiliary means, unable to give full play to the advantages of high cost-effectiveness and high efficiency of geophysical detection

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