Grouting plugging test device and method for simulating water burst of karst pipeline

Abstract

The invention discloses a model test device and method for simulating water burst grouting plugging of a karst pipeline. The device comprises four parts, namely a pipeline system, a pressure-stabilized water supply system, a grouting system and a data acquisition and processing system, wherein the pipeline system is composed of a transparent organic glass pipe and a metal bracket; the inlet of the organic glass pipe is connected with the pressure-stabilized water supply device through a high-pressure hose; a flow valve is arranged on the high-pressure hose; a slurry-water collection tank is arranged at the outlet of the organic glass pipe; a grouting hole is formed in the middle of the organic glass pipe; the grouting hole is connected with the grouting system through a high-pressure slurry delivery pipe; the data acquisition and processing system comprises a pressure sensor I, an electromagnetic flow sensor II and a pressure sensor III; the pressure sensor I is mounted on the organic glass pipe and is used for monitoring the water flow pressure; the electromagnetic flow sensor II is used for monitoring the flow of moving water; the pressure sensor III is mounted on the high-pressure slurry delivery pipe and is used for monitoring the slurry pressure; the pressure sensors I and II and the electromagnetic flow sensor are connected with a paperless recorder; the paperless recorder is capable of recording the change conditions of pressure and flow in the pipeline in real time; and in the grouting plugging process, image acquisition in the grouting process is performed through a high-definition camera.

Description

technical field [0001] The invention relates to a model device for a dynamic water grouting plugging test, in particular to a grouting plugging simulation test device and a test method for high-velocity water flow in a karst pipeline. Background technique [0002] The vast distribution area of ​​soluble rocks in my country accounts for about one-third of the country's land area. In recent years, my country's high-speed railways, highways, and large-scale water conservancy and hydropower projects have entered a period of rapid development, and a large number of underground projects have been constructed in karst areas. Karst pipelines are commonly developed in karst areas. During the construction of underground projects, karst pipelines are often exposed, which can easily induce water inrush disasters in karst pipelines, causing casualties and property losses. [0003] A large number of engineering practices have proved that the grouting technology can achieve a good pluggin...

AI Technical Summary

Problems solved by technology

[0006] 1. The visualization of the dynamic water grouting process cannot be realized, and the interaction between the grout and the dynamic water cannot be observed directly, and there is a "black box" problem

[0007] 2. The size of the existing model test is small, the test device is relatively simple, and the horizontal smooth straight pipeline is mostly used to simulate the karst pipeline, which is quite different from the actual karst pipeline. As a result, the test results are too idealized and the test conclusions cannot Applied to practical engineering

[0008] 3. None of the existing model test devices can provide a stable high-vel

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