【作者】 刘子松； 高永涛；

【Author】 Liu Zisong;Gao Yongtao;School of Civil and Environment Engineering,University of Science and Technology Beijing;

【机构】 北京科技大学土木与环境工程学院；

【摘要】 隧道在穿越浅埋、水下、破碎不良地质段时,为避免发生涌水、坍塌等灾害事故,提出埋深浅、不良围岩条件、地表水源补给以及工程因素是导致灾害发生的4个潜在致灾因子,对其内在联系进行了理论分析,并根据分析结果采取相应的特殊防治措施。在此基础上,以重庆礼让隧道水下浅埋段为工程实例,利用三维数值模型模拟隧道开挖和支护过程,并施工期间系统测试了先行隧道的孔隙水压力、隧道地表沉降、拱顶下沉、周边收敛。结果表明理论研究结果与实际基本相符,处治措施能保证隧道施工安全。更多还原

【Abstract】 In order to avoid the gushing,collapse and other disasters when the tunnel crossing the shallow buried,underwater,adverse rock area,the four potential disaster-induced factors were proposed,showing that the four key potential disaster-induced factors were shallow-buried depth,adverse rock conditions,groundwater supply and engineering factors.Its internal relations were theoretically analyzed,and the special control measures were taken based on the analysis results.By giving an example of Chongqing Lirang Tunnel,using three-dimensional numerical model to simulate the excavation and supporting process and testing the pore water pressure,ground surface settlement,crown settlement,convergence at the advanced tunnel.The results show that the theoretical study is consistent with the actual results and the treatment measures can ensure the safety of tunnel construction.更多还原