Control system of hydraulic boundary conditions in water bearing layer during similar model test

Abstract

The invention relates to a control system of hydraulic boundary conditions in a water bearing layer during a similar model test, which comprises a test bench, a booster pump and a data processing device, wherein similar materials are laid in the test bench; a tunnel and a non-watertight film bag are arranged in the similar materials; a cavity in the non-watertight film bag is connected with the booster pump through a water inlet pipe; and the booster pump is connected with the data processing device. The invention has the advantages that: (1) the hydraulic boundary conditions in any selected position under any geological condition during the similar model test can be successfully controlled; (2) successful laying of the similar materials can be ensured, and the non-watertight film bag canbe laid in any position according to any shape, thereby simulating groundwater seepage or water inrush under special conditions; (3) the film bag has small volume and large flexibility, thus, after the film bag is embedded in the similar materials, the film bag can synchronously deform along with the similar materials, and the influence on the mechanical property of the similar materials at the periphery of the current position is less; and (4) the data processing device can control the hydraulic boundary conditions in the position of the film bag in the similar materials through the booster pump according to the engineering background and simulating requirements.

Description

technical field [0001] The invention relates to a control system, in particular to a hydraulic boundary condition control system inside an aquifer in a similar model test. Background technique [0002] my country is rich in groundwater resources. When mining and utilizing groundwater resources, building underground tunnels or excavating roadways, it is very easy to induce large-scale and sudden water inrush disasters during construction. Scholars in our country have carried out a lot of research work on groundwater seepage and water inrush, but there are also obvious weaknesses. When doing basic models of water inrush similar model tests, uniform materials are generally used, and rock and soil layers are laid in a simplified manner, and arbitrary geological conditions cannot be controlled. The hydraulic boundary conditions at any selected location under the condition. Contents of the invention [0003] The purpose of the present invention is to overcome above-mentioned de...

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Problems solved by technology

Scholars in our country have carried out a lot of research work on groundwater seepage and water inrush, but there are also obvious weaknesses. When doing basic models for water inrush similar model tests, uniform materials are generally used, and rock and soil layers are laid in a simplified manner, and arbitrary geological conditions cannot be controlled. The hydraulic boundary condition at any selected position under the condition

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