Multifunctional integrated cap pressing type pressure chamber in rock coupling penetration test and test method

Abstract

The invention belongs to the field of penetration experimental apparatuses and specifically relates to a multifunctional integrated cap pressing type pressure chamber in a rock coupling penetration test and a test method. The multifunctional integrated cap pressing type pressure chamber comprises a pressure chamber body, a pressure chamber base, a pressure chamber cover, a confining pressure oil inlet, a seepage outlet, a seepage inlet, a pressure chamber lock cap, a hoisting cylinder, an upper pressing head, an upper penetrating plate, a test part, a lower penetrating plate and a lower pressing head, wherein the pressure chamber base is located at the bottom of the pressure chamber; the pressure chamber cover is located at the top of the pressure chamber; the confining pressure oil inlet and the seepage outlet are located at the bottom of the pressure chamber; the seepage inlet is located close to the top of the pressure chamber; the pressure chamber lock cap is located on the outer side of the pressure chamber base and is connected with the pressure chamber base; the hoisting cylinder is arranged at the top of the pressure chamber; the upper pressing head, the upper penetrating plate, the test part, the lower penetrating plate and the lower pressing head are successively arranged in the pressure chamber body; the seepage outlet is successively connected with a cooling water tank and a volume variation gauge. The invention provides a pressure chamber with high safety, degree of automation and multifunction and the test method; complex operation and potential safety hazards are avoided; the pressure chamber is fit for the rock tri-axial coupling penetration test under the coupling effect of temperature-seepage-stress- chemistry (THMC).

Description

technical field [0001] The invention belongs to the field of permeation test instruments, and in particular relates to a multifunctional integral pressure cap pressure chamber and a test method used in a rock triaxial coupling permeation test instrument under the coupled action of temperature-seepage-stress-chemical (THMC). Background technique [0002] Water conservancy and hydropower projects, nuclear waste deep burial disposal, unconventional energy mining and other projects all need to solve the permeability characteristics and mechanical behavior of deep rocks in complex environments. Deep rocks are in high geostress, high geotemperature, high seepage water pressure and hydrochemical environment, and extremely complex temperature-seepage-stress-chemical (THMC) coupling will occur. The experimental research on rock THMC coupling is still in the theoretical research stage, and there will be a lot of room for improvement in the future. The design of the pressure chamber of...

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Problems solved by technology

At present, the existing equipment adopts the multi-screw connection method between the pressure chamber and the base, which makes the pressure chamber have potential safety hazards in a high-pressure environment

If the rock specimen is required to be tested under complex conditions such as high temperature, stress, seepage stress, etc., the volume of the pressure chamber needs to be designed to be large in volume, with thick and heavy body walls. In this case, manual operation is laborious and t...

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