Testing apparatus and method for dry bulk density change of sediment deposit under large water pressure

A technology of sediment deposition and test device, which is applied in the field of test research of water conservancy and hydropower engineering, can solve problems such as difficulty in simulating large water pressure test conditions, and achieve the effect of important production and application value

Active Publication Date: 2014-02-05
CHONGQING JIAOTONG UNIVERSITY
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  • Abstract
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Problems solved by technology

[0005] In the existing indoor test, it is difficult to simulate the test condition of large water pressure

Method used

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  • Testing apparatus and method for dry bulk density change of sediment deposit under large water pressure
  • Testing apparatus and method for dry bulk density change of sediment deposit under large water pressure
  • Testing apparatus and method for dry bulk density change of sediment deposit under large water pressure

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] During specific implementation, a kind of test device for the change of dry bulk density of sediment deposits under high water pressure, its structure is shown in Figure 1- Figure 4 , Figure 1(a) for the back view, Figure 1(b) for the side view, Figure 1(c) For the front view. Figure 1(c) The dotted line of the two units on the right is the U-shaped pressurized tube 2 on the back, and m1, m2, m3...m10 in the figure are the test unit numbers. figure 2 It is a schematic diagram of the top plane of the shell.

[0027] The test device is mainly composed of a shell, a test cylinder, a U-shaped differential pressure tube, a pressurized tube, a connecting tube, a glass observation window, a camera, a computer and connected pressurized equipment. Among them, a plurality of U-shaped differential pressure pipes 2 form a group, and the up...

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Abstract

The invention discloses a testing apparatus and method for the dry bulk density change of a sediment deposit under a large water pressure. The testing apparatus comprises a shell, testing cylinders, a pressurizing system, a communicating pipe, a glass observation window, a camera and a computer, wherein the shell is a main body of the testing apparatus, and is cast of high-grade carbon steel; each testing cylinder is a stainless steel cylinder, and is poured in the shell, the pressurizing system is composed of a plurality of U-shaped stainless steel pipes; the communicating pipe is a stainless steel pipe, and is connected with U-shaped pressurizing pipes, the testing cylinders, a water adding pipe and a material adding pipe. The method is carried out by adopting the device, mercury is injected in the U-shaped pressurizing pipes, the water pressure of deep water is simulated by overlapping large pressure difference, and the testing cylinders and the U-shaped pressurizing pipes are respectively observed; the computer adopts images of the U-shaped pressurizing pipes and the testing cylinders, and the height difference of mercury columns in the U-shaped pressurizing pipes and the change process of a sediment interface in each testing cylinder are measured. The testing apparatus is capable of obtaining the change process of the dry bulk density of the sediment deposit under a 300m water pressure and has an important production application value to the operation management of a super-huge type reservoir.

Description

technical field [0001] The invention belongs to the experimental research field of water conservancy and hydropower engineering, and in particular relates to a test device and method for the change of dry bulk density of silt under high water pressure. Background technique [0002] During the operation of large reservoirs, sediment is deposited in the reservoir. As time changes, the dry bulk density of the sludge also changes. When calculating the sediment discharge ratio of the reservoir, it is mainly determined by the difference between the weight of the sediment entering the reservoir measured by the hydrological station upstream of the reservoir and the weight of the sediment deposited in the reservoir. In actual observation, the sediment volume in the reservoir can only be measured and multiplied by the dry bulk density to obtain the sand weight deposited in the reservoir, so the dry bulk density of the sediment is a key parameter. [0003] In large reservoirs, most o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/24G01N9/36
Inventor 胡江钟强任海涛王兴奎
Owner CHONGQING JIAOTONG UNIVERSITY
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