| 深埋隧洞爆破开挖扰动损伤效应的数值模拟 |
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| 引用本文： | 陈明,胡英国,卢文波,严鹏,周创兵.深埋隧洞爆破开挖扰动损伤效应的数值模拟[J].岩土力学,2011,32(5):1531-1537. |
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| 作者姓名： | 陈明 胡英国 卢文波 严鹏 周创兵 |
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| 作者单位： | 武汉大学,水资源与水电工程科学国家重点试验室,武汉,430072;武汉大学,水工岩石力学教育部重点试验室,武汉,430072 |
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| 基金项目： | 国家973计划项目，国家自然科学基金项目 |
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| 摘 要： | 爆破开挖扰动是深埋隧洞损伤区孕育及演化的重要影响因素。根据隧洞岩体钻爆开挖过程分析了爆炸荷载及开挖荷载瞬态卸荷对岩体的扰动作用,基于LS-DYNA动力有限元程序,提出了利用施加节点反力模拟待开挖隧洞岩体的约束作用,通过控制节点反力的变化过程以模拟开挖荷载瞬态卸荷,采用爆炸荷载变化曲线模拟爆炸作用过程的爆破开挖扰动数值模拟方法,并利用该方法模拟分析了爆破开挖扰动对围岩的损伤效应,结果表明,应力重分布对围岩损伤最大,隧洞围岩损伤区主要由围岩初始应力重分布所导致,爆炸荷载作用将增大围岩损伤区范围,考虑开挖荷载瞬态卸荷作用的围岩损伤区最大,且地应力越高,开挖荷载瞬态卸荷作用对围岩的损伤效应越显著。
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| 关 键 词： | 隧洞 爆破 损伤 瞬态卸荷 数值模拟 |
| 收稿时间： | 2011-02-09 |
Numerical simulation of blasting excavation induced damage to deep tunnel |
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| CHEN Ming,HU Ying-guo,LU Wen-bo,YAN Peng,ZHOU Chuang-bing.Numerical simulation of blasting excavation induced damage to deep tunnel[J].Rock and Soil Mechanics,2011,32(5):1531-1537. |
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| Authors: | CHEN Ming HU Ying-guo LU Wen-bo YAN Peng ZHOU Chuang-bing |
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| Institution: | 1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; 2. Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering of Ministry of Education, Wuhan University, Wuhan 430072, China |
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| Abstract: | Blasting excavation disturbance is an important influence factor to the inoculation and evolution of deep tunnel damaged zone.According to the drilling and blasting excavation process of the tunnel,the disturbance effects induced by blast load and transient unloading of excavation load are analyzed;and based on the LS-DYNA dynamic finite element program,the numerical simulation method of blasting excavation disturbance is proposed that using nodes reaction to simulate the constraint of the awaiting excavati... |
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| Keywords: | tunnel blasting damage transient unloading numerical simulation |
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