| 动荷载作用下地下洞室楔形体稳定性分析 |
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| 引用本文： | 唐红梅,周云涛,陈洪凯,王贺.动荷载作用下地下洞室楔形体稳定性分析[J].工程地质学报(英文版),2015,23(3):485-490. |
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| 作者姓名： | 唐红梅 周云涛 陈洪凯 王贺 |
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| 作者单位： | 重庆交通大学岩土工程研究所 重庆 400074 |
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| 基金项目： | 国家自然科学基金，重庆市国土重大科技项目(CQGT-KT-120301)资助． |
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| 摘 要： | 通过楔形体破坏的3个基本假定建立了地下洞室楔形体物理模型,提出了楔形体稳定性分析的极限平衡方法。该方法得出了楔形体稳定系数计算表达式,并结合几何分析判断楔形体的稳定状态,进一步探讨了楔形体在爆破施工荷载作用下的楔形体稳定性响应。案例分析表明,楔形体在自重作用下处于稳定状态,施加初始爆破荷载时增加了楔形体的稳定性;工程爆炸作用力远远大于楔形体自重荷载,爆破荷载对楔形体稳定性起主导作用;当爆炸荷载反射时楔形体稳定性显著降低,且沿楔形体①面发生单面滑动破坏。
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| 关 键 词： | 地下工程 稳定系数 几何分析 爆炸荷载 |
| 收稿时间： | 2014-10-10 |
STABILITY ANALYSIS FOR WEDGE ROCKMASS OF UNDERGROUND CAVITIES UNDER DYNAMIC LOAD |
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| TANG Hongmei,ZHOU Yuntao,CHEN Hongkai,WANG He.STABILITY ANALYSIS FOR WEDGE ROCKMASS OF UNDERGROUND CAVITIES UNDER DYNAMIC LOAD[J].Journal of Engineering Geology,2015,23(3):485-490. |
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| Authors: | TANG Hongmei ZHOU Yuntao CHEN Hongkai WANG He |
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| Institution: | Institute of Geotechnical Engineering, Chongqing Jiaotong University, Chongqing 400074 |
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| Abstract: | According to three fundamental assumptions of wedge rockmass(wedge) failure, a physical model of wedge in underground cavities is established and a limit equilibrium method for wedge stability analysis is proposed. The method can obtain a stability coefficient calculation expression to judge stability state pursuant to the geometrical analysis. It further discusses wedge stability dynamic response under blasting construction load. Case analysis indicates that wedge in gravity is in a stable state, and the wedge stability increases when the wedge is exerted by beginning blasting load. Engineering blasting load is much greater than the weight of wedge. Blasting load can play a leading role in the wedge stability. When blasting stress waves reflect the wedge, its stability decreases markedly. Single sliding failure of wedge occurs along surface ①. |
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| Keywords: | Underground engineering Stability coefficient Geometrical analysis Blasting load |
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