深基坑开挖对紧邻建筑物影响分析及加固措施优化研究  

Influence of Deep Foundation Pit Excavation on Adjacent Buildings and Optimization of Reinforcement Measures

作　　者：温淑荔[1] WEN Shuli(China Railway 18th Bureau(Group)the 4th Engineering Co.,Ltd.,Tianjin 300350)

机构地区：[1]中铁十八局集团第四工程有限公司,天津300350

出　　处：《现代隧道技术》2020年第4期98-103,共6页Modern Tunnelling Technology

摘　　要：深基坑开挖对邻近建(构)筑物的影响较大,威胁建筑物的安全。文章结合昆明某地铁车站深基坑紧临既有建筑物开挖工程案例,采用数值模拟方法对其加固方案进行了优化设计,研究了加固深度和加固位置对既有建筑物水平和竖向位移的影响规律。结果表明:数值模拟结果与实测数据较为接近,该方法能够较好地反映基坑开挖对周边建筑物的影响;随着加固深度的增大,既有建筑物的位移逐渐降低,但当加固深度超过某一限值后,位移减小量逐渐降低;随着加固位置远离既有建筑,既有建筑位移逐渐增大,但当加固位置距基坑较近时,既有建筑位移也较小。Excavation of deep foundation pit has significant effect on adjacent buildings,threatening the safety of structures.Based on the case of a deep foundation pit excavation of certain metro station adjacent to an existing building in Kunming,the reinforcement scheme is optimized by numerical simulation,and the influence of reinforce⁃ment depth and position on the horizontal and vertical displacements of existing buildings is studied.The results show that the numerical simulation results are close to the measured data and numerical simulation can reflect the influence of deep excavation on the surrounding buildings;with the increase of reinforcement depth,the displace⁃ment of existing building gradually decreases and amount of displacement reduction decreases gradually once the re⁃inforcement depth exceeds certain limit;with an increase of the distance of reinforcement position away from exist⁃ing building,the displacement of existing building gradually increases,and gets small when the reinforcement posi⁃tion is closer to the foundation pit.

关 键 词：地铁 深基坑开挖 既有建筑 加固 安全监测 数值模拟 

分 类 号：TU753[建筑科学—建筑技术科学]