A device for evaluating grouting effect in geotechnical engineering

Abstract

The invention discloses a geotechnical engineering grouting effect evaluation device. The grouting effect evaluation device includes a grout storage tank and a model box connected with the grout storage tank and exerting force through a jack with pressure display; the grout storage tank The bucket includes a slurry storage tank A and a slurry storage tank B separated by a partition and kept connected, and is provided with a grouting pipe connected to the model box; On the bottom plate of the steel plate, there are jacks with pressure display on the top and side of the model box, and the jacks with pressure display are respectively fixed by the reaction frame, and the top is connected with the steel plate on the surface of the peripheral model box through the interface groove; the side wall of the model box There is a small conduit extending into the box and communicating with the slurry storage barrel; the mold box can be moved out along the peripheral mold box frame and is detachable. The device is simple and convenient to operate, and can be used for evaluating grouting effects in geotechnical engineering, so as to realize actual engineering grouting parameters and process optimization.

Description

technical field [0001] The invention relates to a geotechnical engineering grouting effect evaluation device, in particular to a broken rock mass tunnel grouting model and an effect evaluation device thereof. Background technique [0002] With the large-scale construction of geotechnical engineering such as tunnels, foundation pits, and slopes, the advanced small-pipe grouting technology for reinforcing the existing rock mass to ensure the stability of the rock mass and structure has been widely used. However, the development of grouting theory obviously lags behind its engineering application, especially in the evaluation of grouting effect. Due to the concealment of underground engineering, it is impossible to evaluate the effect of grouting through large-scale destructive testing of rock mass, and only local drilling and sampling can be used. This method has the following disadvantages: (1) On-site sampling for indoor physical performance tests affects the construction p...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: (1) On-site sampling for indoor physical performance tests affects the construction progress of the project; (2) Due to the complexity and polygonal geological conditions of the project, the evaluation results of the grouting effect in the test section cannot be directly applied to future projects. Construction engineering; (3) Due to the existence of cavities, cracks and weak structural surfaces in the rock mass, local sampling on site cannot determine the grouting slurry diffusion range, reasonable grouting pressure and other grouting parameters, and it is impossible to evaluate the grouting effect. quantitative evaluation

[0003] Most of the existing indoor grouting models and their grouting effect evaluation devices do not take into account the influence of the structural stress field of the rock mass in actual engineering, nor can the process observation of the grout diffusion radius

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