Elastic wave-assisted cement grouting water stop model test device

Abstract

The invention discloses an elastic wave-assisted cement grouting water stop model test device which comprises a model test box, an underground water injection system, a low-frequency elastic wave grouting system, a high-frequency grout strengthening system and a measurement system. Water injection openings and water outlets are formed in the circumferential side wall of the model test box; a water-bearing medium for simulating a real underground flowing water condition is arranged in the model text box; the underground water injection system is used for injecting underground water into the model test box to simulate the real underground flowing water condition; the low-frequency elastic wave grouting system is used for injecting cement grout to the water-bearing medium in the model test box; the high-frequency grout strengthening system is used for accelerating hydration reaction of the cement grout in the water-bearing medium; the measurement system comprises multiple measurement minisystems; the measurement mini systems are connected with the water outlets and are used for measuring a migration condition of the grout in the water-bearing medium and the pollution degree of the grout to the underground water. The elastic wave-assisted cement grouting water stop model test device has the advantages that the grouting water stop range can be quickly and efficiently expanded, andthe grouting water stop effect can be enhanced.

Description

technical field [0001] The invention relates to an elastic wave assisted cement grouting waterstop model test device. Background technique [0002] When engineering construction is carried out in water-rich strata, groundwater often affects the safety and smooth progress of engineering construction. For example: when excavating a foundation pit in a confined aquifer, the pressurized water will impact the floor of the foundation pit, causing quicksand or piping, which will cause instability and damage to the foundation pit enclosure structure; secondly, when the foundation of the building is located below the groundwater level When , the buoyancy force of groundwater on the bottom surface of the foundation will affect the stability of the foundation. On the other hand, groundwater also has a corrosive effect on reinforced concrete, SO in groundwater 4 2- Ions and Ca(OH) in concrete 2 The reaction produces calcium sulfoaluminate hydrate, the volume of calcium sulfoaluminat...

AI Technical Summary

Problems solved by technology

[0005] In order to study the water-stopping effect of elastic wave-assisted cement grouting technology in real water-rich formations, conventional indoor grouting test equipment cannot apply low-frequency and high-frequency elastic waves, cannot simulate real groundwater seepage conditions, and cannot meet the requirements of testing grout migration. The regular test requirements can no longer meet the requirements, and it is particularly urgent and important to develop elastic wave-assisted cement grouting and water-stop model test devices and methods.

Images