地铁深基坑施工与邻近建筑的关联效应研究  

Analysis of Correlation Effect Between Deep Foundation Pit Construction of Subway and Adjacent Buildings

作　　者：李兵[1] 孙小飞 于忠诚[2] 李高科 LI Bing;SUN Xiaofei;YU Zhongcheng;LI Gaoke(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168;Logistics Services Group,Shenyang Jianzhu University,Shenyang,China,110168)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]沈阳建筑大学后勤服务集团,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2020年第1期86-93,共8页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金重点项目(51738007);辽宁省科技厅项目(201602611);沈阳市科技局项目(Z3318003)

摘　　要：目的研究地铁深基坑开挖对邻近建筑物的影响,分析造成建筑物产生沉降的不同因素,为类似地铁深基坑工程与对建筑物的保护提供可靠指导.方法以岩土数字软件MIDAS GTS NX为基础,结合沈阳地铁十号线北大营街站深基坑工程,建立土体与基坑围护结构相互作用的三维整体计算模型,并将数值模拟值与实测数据进行比较,检验模型的适用性;根据模型分析有哪些因素在基坑开挖时对建筑物变形有影响.结果距基坑边缘距离以及围护桩埋深度对建筑物沉降有较大影响,建筑物边缘距基坑边缘的距离为6 m时,基坑较为安全;基坑围护桩埋入土深度为1.5倍的基坑开挖深度时,可以较好地抑制相邻建筑的变形,超过这个临界点时抑制作用明显减小.结论当类似工程如果建筑物距离基坑小于6 m时,可以提前采取一些加固措施,如设置隔断墙,在开挖前采取提高围护桩入土深度来减小基坑支护结构和邻近建筑物变形.In order to study the influence of deep excavation of subway on adjacent buildings,this paper analyzes the different factors causing settlement of buildings,and provides reliable guidance for the deep foundation pit engineering and the protection of buildings.This combination of Shenyang No.ten subway line Beidaying Street Station Deep Foundation Pit Engineering,geotechnical numerical software MIDAS GTS NX,considering the whole three-dimensional soil and retaining structure interaction model,the numerical value is compared with the measured data,verified the applicability of the model.The distance from the edge of the foundation pit and the depth of the retaining pile is more obvious to the settlement of the building,and the safety distance between the building and the edge of the foundation pit is 6m;The excavation depth of foundation pit retaining piles is 1.5 times.When the depth of foundation pit is deep,the inhibition effect on adjacent buildings is better,and the inhibition effect is obviously reduced when the depth exceeds the critical point.Similar works If the building is less than 6m away from the foundation pit,some reinforcement measures can be taken in advance,such as setting the partition wall,and reducing the foundation pit support structure and adjacent building deformation by increasing the depth of the retaining.pile before excavation.

关 键 词：深基坑 建筑物 监测 数值分析 

分 类 号：TU463[建筑科学—结构工程] TV551.42[建筑科学—土工工程]