True triaxial modeling test of high-sidewall underground caverns subjected to dynamic disturbances  

作　　者：Chuanqing Zhang Jinping Ye Ning Liu Qiming Xie Mingming Hu Lingyu Li 

机构地区：[1]State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,430071,China [2]University of Chinese Academy of Sciences,Beijing,100049,China [3]PowerChina Huadong Engineering Corporation Limited,Hangzhou,310014,China

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2025年第4期2109-2132,共24页岩石力学与岩土工程学报(英文)

基　　金：supported by the National Natural Science Foundation of China (Grant No.52279116);the Key Projects of the Yalong River Joint Fund of the National Natural Science Foundation of China (Grant No.U1865203).

摘　　要：Seismicity resulting from the near-or in-field fault activation significantly affects the stability of large-scale underground caverns that are operating under high-stress conditions.A comprehensive scientific assessment of the operational safety of such caverns requires an in-depth understanding of the response characteristics of the rock mass subjected to dynamic disturbances.To address this issue,we conducted true triaxial modeling tests and dynamic numerical simulations on large underground caverns to investigate the impact of static stress levels,dynamic load parameters,and input directions on the response characteristics of the surrounding rock mass.The findings reveal that:(1)When subjected to identical incident stress waves and static loads,the surrounding rock mass exhibits the greatest stress response during horizontal incidence.When the incident direction is fixed,the mechanical response is more pronounced at the cavern wall parallel to the direction of dynamic loading.(2)A high initial static stress level specifically enhances the impact of dynamic loading.(3)The response of the surrounding rock mass is directly linked to the amplitude of the incident stress wave.High amplitude results in tensile damage in regions experiencing tensile stress concentration under static loading and shear damage in regions experiencing compressive stress concentration.These results have significant implications for the evaluation and prevention of dynamic disasters in the surrounding rock of underground caverns experiencing dynamic disturbances.

关 键 词：High-sidewall underground cavern Modeling test Coupling effect of dynamic and static loads Incident wave Response characteristics Risk coefficient 

分 类 号：TU45[建筑科学—岩土工程] TU91[建筑科学—土工工程]