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

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.

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 ...

AI Technical Summary

Problems solved by technology

Usually the penetration test of dam materials is carried out at the construction site. The water is pumped into the high-level water tank installed on the mountainside or on the top of the mountain, and the water pipe is connected to the gate valve and then passed to the permeameter. Only the water in the instrument can meet the test pressure requirements, and the erection of the water tank is often limited by the site, environment, cost, etc., and it is difficult to reach the ideal height, so the test pressure is limited, so it is impossible to successfully carry out the penetration test of high dam materials

In addition to the limited pressure of this test method, the biggest defect is that the pressure is controlled by manually adjusting the gate valve, and the water pressure in the permeameter changes with the infiltration water flow. The pressure fluctuates greatly, the water pressure is extremely unstable, and the reliability of the test results is greatly reduced;

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