A true triaxial test system and method for simulating residual stress in rock

By setting up an internal pressure loading system with a flexible bladder and sealing ring in a true triaxial pressure frame, the problem that existing true triaxial tests cannot simulate the residual stress inside rocks is solved, and repeatable and controllable simulation of internal stress in rocks is achieved, improving the physical consistency of test results.

CN122192942APending Publication Date: 2026-06-12XIJING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-27
Publication Date
2026-06-12

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Abstract

The application discloses a true triaxial test system and method for simulating residual stress in rock, and belongs to the technical field of rock mechanics test. The system comprises a true triaxial pressure frame and an internal pressure loading system. The internal pressure loading system comprises a flexible bag, and the two ends of the flexible bag are respectively sealed and connected with an upper pressure head and a lower pressure head. The method introduces controllable internal pressure into the rock sample through the flexible bag, so that the internal residual stress participates in the test loading process as an independent variable. The true triaxial pressure frame is used to apply external three-direction principal stresses to the rock sample, and the test conditions are constructed to be closer to the actual stress state of the original rock. The system has reasonable structure and is convenient to operate. The method can realize the repeatable and controllable simulation of the internal residual stress of the rock, and is convenient for studying the deformation, strength evolution and fracture characteristics of the rock under different internal residual stress levels and external stress combination conditions.
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Citation Information

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