Visible variable opening degree crack grouting test device and method under static water and dynamic water conditions

Abstract

The invention discloses a visual variable-opening fissure grouting test device under static water and dynamic water conditions and a use method thereof. The device includes a grouting test platform, a data acquisition device, a water supply device, and a connecting pipeline. The grouting test platform includes the upper and lower plates of the fissure, the fissure opening adjustment block, the sealing rubber ring, and the water storage box. 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 connecting pipelines. The upper and lower plates of the cracks of the grouting test platform are made of tempered glass, and the dimensions of the upper and lower plates of the cracks are exactly the same, and grouting holes and sensor layout holes are reserved on the upper plates of the cracks. The fissure opening adjustment block is used to adjust the fissure opening and is respectively placed on the four corners of the upper and lower disc surfaces of the fissure. The sealing rubber ring and the water storage box are fixed on the sides of the upper and lower disc surfaces of the crack by bolts. The connecting pipe is composed of a steel wire pipe, a water inlet regulating valve, a transfer valve and a flow meter. The steel wire pipes are respectively connected to the water storage box and the flow meter, and then connected to the water tank through a transfer valve.

Description

technical field [0001] The invention relates to a fissure grouting test device under static water and dynamic water conditions, in particular to a test device and a method of using it which can simultaneously realize fissure penetrating grouting under two types of water conservancy conditions of static water and dynamic water. It is suitable for simulating hydrostatic grouting in plane radial flow diffusion mode and dynamic water grouting in U-shaped diffusion mode. Background technique [0002] Grouting technology is a common method to effectively solve the problem of water disasters in underground engineering. Especially for the water inrush disaster during the construction of underground engineering and the leakage of lining during the operation period, the grouting technology has significant advantages. The fracture grouting model test device with strong practicability, many types of working condition simulation and easy acquisition of test parameters has become an indi...

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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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