爆破开挖对下穿既有隧洞动力响应的数值评估  

Numerical Evaluation of Dynamic Response of Blasting Excavation to Underpass Existing Tunnel

作　　者：林超 LIN Chao(Shanxi Transportation Construction Engineering Quality Detection Center(Co.Ltd.),Taiyuan 030000,China)

机构地区：[1]山西省交通建设工程质量检测中心(有限公司),太原030000

出　　处：《武汉理工大学学报（交通科学与工程版）》2024年第3期567-573,共7页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：山西省青年科技研究基金(201701D221060);山西交控人才计划项目(20-JKKJ-62)。

摘　　要：文中以新林隧洞下穿引水电站为工程背景,通过ANSYS/LS-DYNA有限元软件分析了新林隧道下穿引水隧洞爆破震动响应规律,并结合现场实测数据验证了模型的可靠性.对不同开挖推进距离造成既有隧道断面振动响应进行分析,并提出既有隧道破坏限值,确定了隧道破环范围;针对实际工程存在的问题,考虑到既有隧道安全运营和保证周边围岩的稳定,模拟了37个工况,给出了优化后爆破方案.Based on the engineering background of Xinlin tunnel passing through the diversion hydropower station,the blasting vibration response law of Xinlin tunnel passing through the diversion tunnel was analyzed by ANSYS/LS-DYNA finite element software,and the reliability of the model was verified by combining with the field measured data.The vibration response of existing tunnel section caused by different excavation advancing distances was analyzed,then the damage limit value of existing tunnel was put forward and the damage range of tunnel was determined.In view of the problems existing in practical engineering,considering the safe operation of existing tunnels and ensuring the stability of surrounding rocks,37 working conditions were simulated,and the optimized blasting scheme was suggested.

关 键 词：隧道 爆破 动力响应 破坏限值 ANSYS/LS-DYNA 

分 类 号：U455.6[建筑科学—桥梁与隧道工程]