基坑开挖对在建道路的影响及加固措施  

Study on Influence of Foundation Pit Excavation on Road under Construction and Reinforcement Measures

作　　者：孙雅珍[1] 尹方东 叶翔 杨胜彬[4] 王金昌[2,5] SUN Yazhen;YIN Fangdong;YE Xiang;YANG Shengbin;WANG Jinchang(School of Transportation and Geomatics Engineering,Shenyang Jianzhu University,Shenyang,China,110168;Center for Balance Architecture,Zhejiang University,Hangzhou,China,310058;Hangzhou Shangcheng District Urban Construction Development Group Co.Ltd.,Hangzhou,China,310027;Shenyang Geophysical Exploration Institute Limited Liability Company,Shenyang,China,110121;School of Architecture and Engineering,Zhejiang University,Hangzhou,China,310058)

机构地区：[1]沈阳建筑大学交通与测绘工程学院,辽宁沈阳110168 [2]浙江大学平衡建筑研究中心,浙江杭州310058 [3]杭州上城区城市建设发展集团有限公司,浙江杭州310027 [4]沈阳地球物理勘察院有限责任公司,辽宁沈阳110121 [5]浙江大学建筑工程学院,浙江杭州310058

出　　处：《沈阳建筑大学学报（自然科学版）》2024年第1期114-122,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(52278454);浙江省建设厅科技项目(2022K169,2022K073);辽宁省教育厅基本科研项目(LJKZZ20220080,LJKM20220934);浙江省科技厅科研项目(2022C03180)。

摘　　要：目的 分析基坑开挖对围护结构和在建道路的影响,探究保证基坑和道路结构稳定的加固措施。方法 以杭州市某基坑与在建道路交叉施工为工程背景,进行三维有限元建模,对基坑开挖和道路振动施工全过程进行模拟。结果 在道路振动施工作用下,基坑围护结构最大水平位移为5.26 mm;基坑开挖完成后,基坑围护结构的水平变形和道路的竖向变形均较大,须采用加固措施控制围护结构和道路的变形。结论 在基坑全部卸荷后,采用斜撑和增加支撑预应力综合加固措施与未采用加固措施相比,CX20监测点的最大水平位移和道路最大沉降分别减小了28.97%和35.34%,变形控制效果显著。In order to analyze and explore the influence of foundation pit excavation on the road under construction and the reinforcement measures that can ensure the stability of foundation pit and road structure,a 3-D FE model was established based on the practice of the simultaneous construction of a foundation pit and a road in Hangzhou.Under the action of road vibration,the maximum horizontal displacement of foundation pit envelope is 5.26 mm.After the foundation pit excavation,the horizontal deformation of the envelope and the vertical deformation of the road are large,and the reinforcement measures should be adopted.The results show that the maximum horizontal displacement of CX20 monitoring point and the maximum settlement of the road are reduced by 28.97%and 35.34%for the comprehensive strengthening measures of diagonal bracing and increasing brace prestress are adopted,respectively,when compared to without strengthening measures.The deformation control effect is remarkable.

关 键 词：在建道路 振动施工 基坑开挖 数值分析 基坑加固 

分 类 号：TU47[建筑科学—结构工程]