High-pressure penetration deformation testing method of reservoir grit stone dam materials

A technology of sand-gravel dam and test method, applied in the field of test, can solve the problems of limited test pressure, large pressure fluctuation, unstable water pressure, etc.

CN101526517AInactive Publication Date: 2009-09-09青海省水利水电科学研究所
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2009-09-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a testing method, in particular to a high-pressure penetration deformation testing method of reservoir grit stone dam materials, comprising the following steps: 1) gas storage, namely, starting up an air compressor, opening a compressed air gate vale to input compressed air into a compression gas tank; 2) water supply and prepare for starting up water pump, namely, opening the water supply gate of a permeameter, a water supply control valve is under close state at the moment and waiting for being started up to supply water; and 3) water supply, namely, gyrating a compressed air regulating valve so as to supply stated pressure in accordant with test dam materials into the inner air bag of a pressure regulation chamber, meanwhile automatically opening the piston of the water supply control valve so as to provide osmotic flow with corresponding pressure. The large scale high-pressure permeameter of the invention can bear high-pressure water head more than 100 meters, the pressure of a water supply system is stable, and pressure oscillation is less than or equal to 2.7%. The dam materials which are tested by the method can be widely applied to the buildings of reservoir dam bodies.
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Description

Technical field

[0001] The invention relates to a test method, in particular to a high-pressure seepage deformation test method of a sand gravel dam material of a reservoir. Background technique

[0002] At present, for the dam material of the concrete-faced sand-gravel dam of the reservoir, it is necessary to conduct various performance tests on whether the dam material is suitable for the reservoir dam material. Usually the permeability test of the dam material is carried out on the construction site. The water pump is pumped into the high-level water tank set on the mountainside or the top of the mountain, and the water pipe is connected to the gate valve and then passed to the infiltration meter. Because only the high-level water tank reaches a certain height, it is connected to the infiltration meter. The water in the instrument can meet the test pressure requirements, and the installation of the water tank is often restricted by the site, environment, cost, etc., and it is ...

Examples

Embodiment 1

[0024] 1. The large-scale high-pressure permeameter 1 of the present invention is selected by welding high-quality steel plates with a thickness of 10-12 mm. The large-scale high-pressure permeameter 1 of the present invention is to meet the interlayer transition test of cushion material, filter material, main stack material, etc., and permeameter test The height of the cylinder is 1200mm, the total height of the permeameter is 2400mm, and the diameter of the permeameter test cylinder is 800mm; in order to meet the 100-meter head pressure test, the maximum working pressure of the permeameter is 1.0Mpa; the maximum particle size of the sample, the test dam material, is 200mm; Set the permeameter pressure gauge 30, the permeameter exhaust valve 31, the permeameter water inlet valve 32, the permeameter drain valve 33 and 8 pressure gauges 30, such as image 3 Shown

[0025] 2. Since the maximum water head of the test is 100m, the tap water cannot be directly pressurized to meet the p...