Visual saturated dynamic water-bearing sand bed permeation grouting test device and method

Abstract

The invention discloses a visual saturated dynamic water-bearing sand bed permeation grouting test device and method. The visual saturated dynamic water-bearing sand bed permeation grouting test device comprises a visual model box, a grouting pump, a sprinkling plate, an oil pump, a constant head water tank, a laser sheet source transmitter, an industrial camera and a data collection system, wherein slurry is injected into the visual model box by the grouting pump through a slurry delivery pipe; openings are uniformly formed in a bottom plate; a layer of filter net covers the bottom plate; an oil receiving tank is arranged at the bottom of the visual model box and connected with the oil pump through an oil delivery pipe; the oil pump is connected with the constant head water tank; a locating water tank is also connected with the sprinkling plate connected to the top of the visual model box through the oil delivery pipe; the laser sheet source transmitter is arranged at one side of the visual model box; laser light emitted from the laser sheet source transmitter penetrates through transparent soil through the visual model box to form a uniform speckle field; the shooting direction of the industrial camera is located in a normal direction of a laser plane; and the camera is connected with the data collection system and records the change of the speckle field in real time.

Description

technical field [0001] The invention relates to a model test device and method for infiltration grouting of a saturated sand layer under the action of three-dimensional visualization of groundwater seepage. Background technique [0002] The saturated dynamic water-bearing sand layer has a loose structure, no cohesion, and poor self-stabilization ability. Excavating tunnels in this type of stratum is likely to cause engineering disasters such as water gushing, sand collapse, and landslides, which seriously affect the construction progress and cause huge casualties. Economic losses. When tunnel construction is carried out in saturated and dynamic water-bearing sand strata, it is necessary to use stratum reinforcement technology to reinforce the surrounding rock of the tunnel, so as to improve the mechanical properties of the surrounding rock, reduce the permeability of the surrounding rock, and reduce the ground subsidence caused by excavation. So as to ensure the safe and sm...

AI Technical Summary

Problems solved by technology

[0003] The traditional grouting model test has a "black box nature". Due to the opacity of the soil, it is impossible to accurately obtain the diffusion range and migration distance of the grout, and it is impossible to continuously observe and record the deformation of the grouting medium and each point of the grouting fluid.

Images