摘要
基于挡土墙对数螺旋破坏机制,考虑非线性Hoek-Brown强度准则,采用极限分析上限法计算了挡土墙的土体重力功率、内能耗散率和主动土压力功率,根据虚功率原理推导了挡土墙的主动土压力解析式,并采用Matlab软件求解了主动土压力的最优上限解.分析挡土墙和土体的参数、Hoek-Brown强度准则对挡土墙的主动土压力及稳定性的影响,结果表明,随着扰动因子、墙背倾角、挡土墙高度和土体容重的增大,主动土压力非线性增大,挡土墙的稳定性降低;随着地质强度指标、岩体常数、外摩擦角和单轴抗压强度的增大,主动土压力非线性减小,挡土墙的稳定性增加.
Based on the logarithmic spiral failure mechanism of the retaining wall and the nonlinear Hoek-Brown strength criterion,the earth gravity power,internal energy dissipation rate and active earth pressure power of the retaining wall are calculated by the upper limit analysis method.The analytic formula of active earth pressure of the retaining wall is derived based on the virtual power principle,and the optimal upper limit solution of the active earth pressure is solved by Matlab software.The influence of Hoek-Brown strength criterion,retaining wall and soil parameters on the active earth pressure and stability of the retaining wall are analyzed.The results show that with the increase of disturbance factor,wall back angle,retaining wall height,and soil bulk density,the active earth pressure increases nonlinearly,and the stability of the retaining wall decreases.As the geological strength index,rock mass constant,external friction angle,and uniaxial compressive strength increase,the active earth pressure nonlinearly decreases,and the stability of the retaining wall increases.
作者
孙望成
张道兵
蒋瑾
蔚彪
尹华东
SUN Wangcheng;ZHANG Daobing;JIANG Jin;YU Biao;YIN Huadong(School of Resource Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, Hunan China;Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines, Hunan University of Science and Technology, Xiangtan 411201, Hunan China;Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines, Hunan University of Science and Technology, Xiangtan 411201, Hunan China)
出处
《吉首大学学报（自然科学版）》
CAS
2021年第1期61-65,共5页
Journal of Jishou University(Natural Sciences Edition)
基金
国家自然科学基金资助项目(52074116,51804113,52004088)
湖南省自然科学基金资助项目(2019JJ40082)。
