Visual variable opening crack grouting test device and method under hydrostatic and dynamic water conditions

Abstract

The invention discloses a visual variable opening crack grouting test device and method under hydrostatic and dynamic water conditions. The device comprises a grouting test platform, a data collectingdevice, a water supply device, and a connecting pipe. The grouting test platform comprises crack upper and lower discs, a crack opening adjustment block, a sealing rubber ring, and a water storage tank. The components of the grouting test platform are connected by bolts, and the water supply device and the grouting test platform are connected in series through the connecting pipe. The crack upperand lower discs of the grouting test platform are made of tempered glass and has the exact same size, and the grouting holes and the sensor setting holes are disposed in the discs. The crack openingadjustment block is used to adjust the crack opening degree and is respectively placed on the four corners of the crack upper and lower discs. The sealing rubber ring and the water storage tank are fixed to the side of the crack upper and lower discs by the bolts. The connecting pipe is composed of a wire pipe, a water amount regulating valve, an adapter valve, and a flow meter. The wire pipe is connected to the water storage tank and the flow meter respectively, and is connected to a water tank through the adapter valve.

Description

technical field [0001] The invention relates to a fissure grouting test device for static water and dynamic water conditions, in particular to a test device and a use method capable of simultaneously realizing fissure infiltration grouting under static water and dynamic water conditions. It is suitable for simulating hydrostatic grouting in planar radial flow diffusion mode and hydrodynamic grouting in U-shaped diffusion mode. Background technique [0002] Grouting technology is a common means to effectively solve the problem of water disasters in underground engineering. Especially for the inrush water disasters during the construction of underground projects and the lining water leakage disasters during the operation period, the grouting technology has significant advantages. The fissure grouting model test device with strong practicability, various types of working condition simulation, and easy acquisition of test parameters has become an indispensable tool for theoreti...

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Problems solved by technology

[0003] (1) Limited by the design size, there is a certain boundary effect, and it is impossible to study the grouting diffusion law when the grout spreads in the form of plane radial flow under static water conditions, including the change of grouting pressure after grouting and water mixing, the attenuation of grouting pressure, etc.

[0004] (2) The simulation working conditions are single, which cannot satisfy the simulation of slurry under various working conditions such as different crack openings, hydrostatic pressure and dynamic water velocity, and cannot obtain the migration, deposition and percolation laws of slurry under corresponding working conditions

[0005] (3) The cracks are all composed of smooth parallel plates, and there are few monitoring points, so it is impossible to obtain the information of the entire flow field and pressure field of the slurry

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