DataVXInternational Journal of Damage MechanicsPaper
journal article·2024-01

Seepage-stress combined experiment and damage model of rock in different loading and unloading paths

Zhi Zheng, Hongyu Xu, Wei Wang, Qiang Zhang, Yujie Wang, Qiancheng Sun, Honghui Tao, Xiaofeng Han

International Journal of Damage Mechanics· Volume 33· Issue 1
Publisher page
Source abstract

Abstract

In the excavation of water-related underground projects such as hydropower and energy reserves, the surrounding rock surfers complex stress path and stress state redistribution, resulting in damage and failure under the hydro-mechanical coupling condition. However, the rock hydro-mechanical coupling characteristics under complex stress paths are unclear and corresponding theoretical models are scarce. In this study, a series of tests such as triaxial compression, unloading confining pressure and cyclic loading and unloading were carried out to study the effects of different stress paths, stress levels and seepage pressure on rock deformation, strength, failure and permeability. Based on test results, the damage evolutions under three different testing paths were analyzed, a new seepage-stress coupling statistical damage model which can better simulate the compaction stage is proposed. The prediction results of the proposed model under different stress paths are in good agreement with the experimental results. Under different stress paths, the fitting relationship between parameters R 0 and n and σ eff is similar and has good correlation.
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Research context

OpenAlex topics: Rock Mechanics and Modeling · Landslides and related hazards

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, College of Civil Engineering and Architecture, Guangxi University, Nanning, China

Key Laboratory of Geological Hazards on Three Gorges Reservoir Area (China Three Gorges University), Ministry of Education, Yichang, China

State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, China

Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai, China

Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing, China

China Energy Engineering Group, Guangxi Electric Power Design Institute, Nanning, China

Funding

Systematic Project of Guangxi Key Laboratory of Disaster Prevention and Engineering Safety · Guangxi Science and Technology Project · Guangxi Natural Science Foundation · Open Research Fund of State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin · the Open Fund of Key Laboratory of Geological Hazards on Three Gorges Reservoir Area (China Three Gorges University), Ministry of Education · National Natural Science Foundation of China

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