A hydraulic boundary point control device

Abstract

The invention discloses a control device of a hydraulic boundary point location. The control device of the hydraulic boundary point location includes at least one upstream hydraulic boundary point location control unit, at least one downstream hydraulic boundary point location control unit, a model box and a rock test sample; the test sample includes a crack; the upstream hydraulic boundary pointlocation control unit and the downstream hydraulic boundary point location control unit separately include a water supplementation component, a water head control component, an overflowing component and a boundary sealing component; the test sample is arranged in the model box, and the water head control component communicates the crack in the rock test sample. The control device of a hydraulic boundary point location according to the invention is used for realizing accurate control of a hydraulic boundary condition, and effective sealing of a hydraulic boundary around a model. The upstream hydraulic boundary point location control unit and the downstream hydraulic boundary point location control unit are used for controlling an upstream water head and a downstream water head respectivelyto as to simulate the difference in real water levels at two sides of a prototype rock mass to form a stable and continuous seepage field.

Description

technical field [0001] The invention relates to the field of deep engineering and environment, in particular to a hydraulic boundary point control device. Background technique [0002] Aiming at the problem of long-duration migration of liquid gas and pollutants in deep ground represented by nuclide breakdown engineering and geological barrier process in the deep ground disposal of high-level radioactive waste, high-level radioactive waste is highly radioactive, highly toxic, and has a half-life of more than 10,000 years. And it is a special heat-generating waste. It is extremely difficult to safely dispose of it. It faces a series of challenges in science, technology, engineering, humanities and sociology. The biggest difficulty lies in the sufficient and reliable permanent isolation of high-level radioactive waste from the biosphere. And the isolation time needs to exceed 10,000 years. The currently recognized safe, reliable and technically feasible method is the deep gro...

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Problems solved by technology

However, the patent has the following problems: the patent mainly relies on the pressure sensor for real-time feedback and precise adjustment of the water pressure. If the pressure sensor fails under supergravity, it will not be able to guarantee the normal operation of the entire device, resulting in failure of subsequent tests. For In the case of testing under high acceleration and supergravity, the pressure sensor is likely to fail; and the premise of the normal operation of the hydraulic boundary control in this patent is that the boundaries on both sides do not affect each other, so it must be ensured that the two work independently, that is, the model The boundary water level on both sides should have a sealed boundary, and the applicable object of this patent only considers the soil medium model. For rock mass media with fracture networks such as granite, if the same method is used to apply water pressure on both sides of the model, such as centrifugal When the acceleration test value reaches the high acceleration range, the water pressure on the side of the model will increase by more than 300 times. Although high-strength glue can be applied on the contact surface between the model and the model box in advance to achieve the sealing of the water level boundary, it may still cause the glue to tear and fail , so that the model boundary cannot be sealed, destroying the independence of the water level boundary, and affecting the follow-up test results, such as the monitoring of seepage

However, the existing technology still cannot solve the

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