地铁区间明挖对迎泽公园门牌楼土体稳定性的影响分析  

Analysis on the Stability of the Soil Mass of Yingze Park Archway due to the Open Excavation in the Subway Section

作　　者：梁波 Liang Bo

机构地区：[1]太原轨道交通集团有限公司

出　　处：《城市建筑》2024年第22期199-203,共5页Urbanism and Architecture

摘　　要：针对迎泽公园门牌楼与地铁区间明挖段距离较近的现状,文章采用PLAXIS软件研究地连墙及基坑开挖施工对于门牌楼地下变形的影响,分析施工各个阶段对于门牌楼之间地下变形的规律。结果表明:地下连续墙掏土施工时不做泥浆护壁的最危险工况下,采用灌注桩基础及搅拌隔离桩约束的处理,保证门牌楼侧土体的横向变形在规范允许范围之内;基坑开挖在支撑架状态下由于地下连续墙围护的条件,地下变形呈抛物线状,最大变形满足一级设计安全等级支护类型为地下连续墙类型的基坑变形限值,地下连续墙具有决定性的作用,而围护桩的作用则可忽略。In view of the close distance between the gate archway of Yingze Park and the open excavation section of the subway section,the influence of the construction of the diaphragm wall and the foundation pit excavation on the underground deformation of the gate archway was studied by using the plaxis software,and the law of the underground deformation between the gate archways in each construction stage was analyzed.The results show that under the most dangerous working conditions,when the diaphragm wall is excavated without mud protection,the cast-in-place pile foundation and the mixing isolation pile restraint are adopted to ensure that the lateral deformation of the soil at the side of the gate building is within the allowable range of the specification.Under the condition of support frame,the underground deformation of foundation pit excavation is parabola due to the condition of underground diaphragm wall enclosure,and the maximum deformation meets the limit value of foundation pit deformation when the support type of Grade I design safety grade is underground diaphragm wall type.The diaphragm wall plays a decisive role while the role of retaining pile can be ignored.

关 键 词：基坑开挖 基坑变形 稳定 仿真分析 

分 类 号：TU746[建筑科学—建筑技术科学]