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Water-collecting ground crack physical model test device and test method

A technology of physical model and test device, applied in soil material testing, material inspection products, etc., can solve problems such as the inability to simulate groundwater mining methods, the inability to strictly control the drainage and water level boundary conditions, and the inability to simulate ground fissures in confined aquifers.

Active Publication Date: 2019-05-03
NANJING UNIV
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Problems solved by technology

The experimental system can simulate the ground fissures caused by natural gravity drainage in the lower part of the unconfined aquifer, but it cannot strictly control the drainage and water level boundary conditions, and cannot simulate the ground fissures caused by the pumping of the confined aquifer, nor can it simulate different groundwater exploitation methods

Method used

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  • Water-collecting ground crack physical model test device and test method
  • Water-collecting ground crack physical model test device and test method
  • Water-collecting ground crack physical model test device and test method

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with accompanying drawings and embodiments.

[0033] like figure 1 and figure 2 As shown, a physical model test device for water harvesting ground fissures disclosed in the embodiment of the present invention includes a model box, simulation materials, pumping and water supply systems, and a measurement and data acquisition system. The size of the model box 1 is 140cm (length) * 100cm (width) * 120cm (height), the side is a plexiglass plate with a thickness of 10mm, and the bottom is a steel plate. There are respectively 10cm wide water storage tanks 9 on both sides of the model box. The plexiglass box is fixed by 304 stainless steel angle steel (the specification is 40mm*40mm*4mm), and No. 5 channel steel (the specification is 35mm*35mm*50mm) is installed at the bottom. The side water storage tank 9 adopts 304 stainless steel square pipes (the specification is 30mm*100mm*1mm) as a cross brace, and ...

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Abstract

The invention discloses a water-collecting ground crack physical model test device and test method. The test device includes a model case, a simulation material, a water pumping and supply system anda measurement system, wherein the simulation material includes filling simulating a aquifer and / or anaquitard and the gypsum simulating the bed rock, the water pumping and supply system includes a well pipe, a water pump connected with the well pipe, a water storage tank, a water storage cylinder and a water level adjusting tank which is connected with the water storage tank for controlling the water level in the water storage tank, and the measurement system includes a vertical displacement target, a horizontal displacement target, a displacement sensor, a pore water pressure sensor, a film pressure sensor and a digital camera and is used for monitoring pore water pressure and stress changes at different locations in the filling during pumping or irrigation, filling displacement and crackformation and evolution. The test device is advantaged in that the test device can reveal the evolution mechanism of the water-collecting ground crack, provide the scientific basis for construction of the ground crack numerical simulation method and provide the scientific basis for ground crack prevention and control.

Description

technical field [0001] The invention relates to a physical model test device and a test method for ground fissures caused by groundwater exploitation, and belongs to the field of geological engineering ground fissure testing. Background technique [0002] The exploitation of groundwater changes the pore water pressure and effective stress of the aquifer system. When the stress state of a point in the soil layer meets certain conditions, the point can reach strength failure (crack failure or shear failure). When more and more damage points are connected together, and the surface rock and soil mass is cracked, ground fissures are formed, and the ground fissures may further expand after formation. Ground fissures are one of the geological disasters caused by groundwater exploitation, and their formation and development have caused great damage to surface buildings (structures) and underground pipelines. However, there are still few studies on the mechanism of ground fissures ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
Inventor 张云何国峰
Owner NANJING UNIV
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