镜像法在隧道施工土体位移计算中的应用  

Application of image method in calculating tunneling-induced soil displacement

作　　者：姜忻良[1] 赵志民[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《哈尔滨工业大学学报》2005年第6期801-803,共3页Journal of Harbin Institute of Technology

基　　金：天津市科技发展计划资助项目(023112311).

摘　　要：城市地下隧道的修建会引起隧道周围一定范围土体的位移,对土体位移进行较为准确的计算对于控制隧道周围土体位移量和减小过大土体位移对既有建筑物及管线带来的危害十分重要.本文根据地层损失的空间分布规律,应用镜像法原理,首次采用数值积分法,对隧道推进过程中由地层损失产生的位移场进行空间分析,得到隧道周围土体的位移场分布.计算表明,镜像法的计算结果与巴塞罗纳地下隧道、泰国Bangkok污水隧道的实测结果吻合良好.为计算隧道施工引起的土体位移提供了一种新的计算方法.Tunneling in urban areas causes the movement of the soil around the tunnel, so estimating potential soil movement is very important to control soil movement amount and protect existed construction foundation and underground pipelines. According to the space regularities of distribution of ground loss and by image method theory, this paper initiates numerical integrating in spatial analyzing for ground loss caused displacement field during tunneling and gets displacement field allocation. The calculations on case projects of Barcelona subway network and Thailand Bangkok sewer tunnel indicate that the calculated results are in good coincidence with observed results. This paper provides a new method for calculating tunneling-induced soil displacement.

关 键 词：隧道施工 地层损失 镜像方法 数值积分 

分 类 号：U455[建筑科学—桥梁与隧道工程]