Test device for simulating grouting diffusion radius of gravel formation under dynamic water environment

Abstract

The invention discloses a test device for simulating a grouting diffusion radius of a gravel formation under dynamic water environment, belonging to the technical field of test equipment of grouting material performance. The test device comprises a support and a steel stainless box body, and is characterized by further comprising a grouting pump and a water injection pump, wherein the steel stainless box body comprises a first front baffle, a second front baffle, a first semi-circular half close tube, a second semi-circular half close tube, and a rear cover, the steel stainless box body is internally provided with a sand block plate which is close to the rear cover, the sand block plate is connected with a telescopic screw, the telescopic screw penetrates the rear cover, the steel stainless box body is provided with a grouting hole and a water injection hole, the grouting hole is connected with a grouting tube, the grouting tube and the grouting pump are connected, the water injectionhole is connected with a water injection tube, and the water injection tube and the water injection tube are connected. The test device can quantitatively describe and analyze diffusion rules of groutin gravel formation under dynamic water environment, thereby greatly reducing a design error of a grout diffusion radius in engineering design.

Description

technical field [0001] The invention relates to the technical field of grouting material performance testing equipment, in particular to a test device for simulating the diffusion radius of grouting in gravel formations under dynamic water environment. Background technique [0002] After continuous development, grouting technology has made great progress, and gradually developed into a highly professional discipline. However, since the grouting project is a concealed project, the diffusion process of the grouting material in the formation is concealed, and the diffusion form of the grout is extremely complicated. Because it is difficult to obtain accurate grouting parameters, it brings certain difficulties to the grouting engineering design. [0003] Gravel strata are widely distributed in our country, and more and more underground projects come into contact with the gravel stratum, and the requirements for the utilization of the gravel stratum are getting higher and higher...

AI Technical Summary

Problems solved by technology

[0007] 1. The medium filling device cannot be opened, and the diffusion of the slurry on the surface of the medium can only be observed through the side wall, but the diffusion characteristics of the slurry inside the medium cannot be obtained; the device can only realize the simulation of ultra-fine grouting materials, and cannot use coarse particles such as cement Grouting material

[0008] 2. Compared with stainless steel, the strength of plexiglass material is low, and it cannot withstand the high pressure of dynamic water; the maximum grouting pressure of the device is only 2MPa, and it cannot simulate high-pressure grouting

[0009] 3. The sensors are only arranged at equal intervals in the longitudinal direction, but cannot obtain the pressure in the axial diffusion range of the grout; there is no overflow port on the periphery of the device, which cannot simulate the actual formation pressure of the grouting body

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