深基坑开挖对临近建筑物的稳定性分析  

Stability analysis of deep foundation pit excavation on adjacent buildings

作　　者：康凯 李宁[1] 石卫 谭天翔 王姝婧 Kang Kai;Li Ning;Shi Wei;Tan Tianxiang;Wang Shujing(School of Civil and Architectural Engineering,Xi’an University of Technology,Xi’an 710048,Shaanxi,China;Shaanxi Engineering Technology Research Center for Urban Geology and Underground Space,Xi’an 710068,Shaanxi,China;.Shaanxi Hydrogeolog Engineering Geology and Environment Geology Survey Center,Xi’an 710068,Shaanxi,China;China Construction Eighth Engineering Bureau Co.,Ltd.,Shanghai 200112,China)

机构地区：[1]西安理工大学土木建筑工程学院,陕西西安710048 [2]陕西省城市地质与地下空间工程技术研究中心,陕西西安710068 [3]陕西省水工环地质调查中心,陕西西安710068 [4]中国建筑第八工程局有限公司,上海200112

出　　处：《岩土工程技术》2025年第1期89-96,共8页Geotechnical Engineering Technique

基　　金：陕西省重点研发计划项目(2021SF2-02);陕西省公益性地质专项(202109,20180303)。

摘　　要：由深基坑开挖卸荷引起的邻近既有建筑物变形问题是城市基础设施建设面临的热点和难点问题。依托西安某大厦改扩建工程建立数值模型,以不同支护结构、建筑物与基坑间距为研究变量,分析了不同工况下深基坑开挖对邻近既有建筑物稳定性的影响特性。结果表明:桩锚支护体系的围护效果最好,双排桩在合适的排桩间距下也能发挥良好的支护效果;随着建筑物与基坑间距的增大,建筑物所受到的扰动随之减小,基坑开挖造成的扰动具有一定的范围,本工程条件下,在12 m之外的建筑物所受扰动不会影响其安全使用。The deformation of adjacent existing buildings induced by deep foundation pit excavation and unloading poses a significant and challenging issue in urban infrastructure construction.A numerical analysis model was established based on the reconstruction and expansion project of a building in Xi’an.Different supporting structures and the spacing between buildings and the foundation pit were investigated as research variables to analyze the impact characteristics of deep foundation pit excavation on adjacent existing buildings under various working conditions.The results revealed that the pile-anchor support system exhibited the best enclosure effect,while double-row piles could also achieve good supporting performance under appropriate pile spacing.Furthermore,the disturbance caused by foundation pit excavation has a limited range;specifically,buildings located beyond 12 m from the excavation site experienced negligible disturbance that did not compromise their safe use.

关 键 词：基坑开挖 邻近建筑 支护结构 变形 

分 类 号：TU470[建筑科学—结构工程]