A critical test simulation equipment for penetration splitting grouting

Abstract

The invention discloses a critical test simulation device for penetration split grouting, comprising a covering earth pressure simulation unit, a grouting test tank unit and a confining pressure simulation unit. The grouting test tank unit comprises a steel outer cylinder, a steel inner cylinder A cylinder, and a soil sample set in a steel inner cylinder, the steel outer cylinder is provided with a first cover, a cavity is formed between the steel outer cylinder and the steel inner cylinder, and the steel inner cylinder is The side wall of the cylinder is provided with holes that communicate with the cavity, the inner wall of the steel inner cylinder is provided with geotextiles, the bottom of the grouting test tank unit is installed with a piezometer and a first drainage pipe, the soil sample A pressure bearing plate is arranged above and below the first cover body, a grouting pipe is arranged on the first cover body, and a grouting pipe is arranged on the first cover body for injecting between the first cover body and the pressure bearing plate. A gas pipe through which high-pressure air is introduced into the void. The device of the invention eliminates the time and cost spent on field test grouting, and effectively improves the effect of on-site penetrating grouting.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, in particular to critical test simulation equipment for seepage splitting grouting. Background technique [0002] Seepage grouting can often play a positive role in the reservoir water leakage caused by the seepage of the dam, or even the instability of the dam body. However, infiltration grouting has extremely high requirements on the grouting process, including the selection of grouting parameters, the stress state on site, the physical and mechanical parameters of the soil on site, and the rheological properties of the slurry itself, etc., which will significantly affect the effect of infiltration grouting. Infiltration grouting with wrong parameters often fails to significantly increase soil shear strength and reduce soil permeability coefficient after grouting, which wastes engineering cost and construction period. Therefore, we propose a critical test simulation equipment f...

AI Technical Summary

Problems solved by technology

However, infiltration grouting has extremely high requirements on the grouting process, including the selection of grouting parameters, the stress state on site, the physical and mechanical parameters of the soil on site, and the rheological properties of the slurry itself, etc., which will significantly affect the effect of infiltration grouting. Infiltration grouting with wrong parameters often fails to significantly increase soil shear strength and reduce soil permeability coefficient after grouting, which wastes engineering cost and construction period. Therefore, we propose a critical test simulation equipment for infiltration splitting grouting

Images