| 分离式隧道非同步开挖岩爆预测研究 |
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| 引用本文： | 邱道宏,陈剑平,肖云华,秦胜伍.分离式隧道非同步开挖岩爆预测研究[J].岩土力学,2009,30(2):515-520. |
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| 作者姓名： | 邱道宏 陈剑平 肖云华 秦胜伍 |
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| 作者单位： | 1. 吉林大学,建设工程学院,长春,130026;山东大学,岩土与结构工程研究中心,济南,250061
2. 吉林大学,建设工程学院,长春,130026 |
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| 基金项目： | 国家自然科学基金，教育部资助优秀年轻教师基金，吉林大学面向21世纪教育振兴行动计划（985计划），吉林大学面向21世纪教育振兴行动计划（985计划） |
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| 摘 要： | 分离式隧道是深埋长大高速公路隧道施工的主要方式，鉴于两洞的施工进度不同，利用先开挖洞的岩爆发生情况，对后开挖洞的岩爆发生情况进行了预测，并采用有限元数值模拟进行计算分析。结果表明，当初始应力场中的水平应力和竖向应力相当时，随着研究区侧压力系数的增大和净距的减小，后开挖洞拱底发生岩爆的强度会随之增大。当初始应力场中的水平应力占主导地位时，随着研究区侧压力系数的增大和净距的减小，后开挖洞拱顶发生岩爆的强度会随之减少。通过实际工程对计算分析结果进行了验证，结果表明，隧道实际发生岩爆的情况和计算结果较为吻合。
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| 关 键 词： | 分离式隧道 岩爆 侧压力系数 有限元模拟 隧道净距 |
| 收稿时间： | 2007-04-12 |
Study of rockburst prediction of separated tunnel excavated asynchronoushy |
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| QIU Dao-hong,CHEN Jian-ping,XIAO Yun-hua,QIN Sheng-wu.Study of rockburst prediction of separated tunnel excavated asynchronoushy[J].Rock and Soil Mechanics,2009,30(2):515-520. |
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| Authors: | QIU Dao-hong CHEN Jian-ping XIAO Yun-hua QIN Sheng-wu |
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| Institution: | 1. College of Construction Engineering, Jilin University, Changchun 130026, China; 2. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China |
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| Abstract: | Separated tunnel is a primary job practice in deep and overlength highway tunnel. Taking into account the diversity of construction progress of two tunnels, it is put forward that the study of rockburst prediction of the tunnel excavated slower through the rockburst condition of the tunnel excavated quicker. In order to investigate the rockburst influence of the tunnel excavated quicker to the tunnel excavated slower, a series of calculations and analyses are carried out by using the FEM; and some results are obtained. When horizontal stress is equivalent to vertical stress in initial stress field, the rockburst intensity of arch bottom of the tunnel excavated slower will increase with the increment of lateral pressure coefficient and the decrease of tunnel clear distance; when horizontal stress is dominant in initial stress field, the rockburst intensity of crown of the tunnel excavated slower will decrease with the increment of lateral-stress coefficient and the decrease of tunnel clear distance. Finally, the practical example demonstrates that the rockburst situations of the tunnel accord with the analytical result of the method. |
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| Keywords: | separated tunnel rockburst lateral-stress coefficient finite element simulation tunnel clear distance |
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