深基坑开挖与邻近建筑物的相互影响及加固措施

引用文献:

姚希 夏长华 江宁 李德志 丁保华. 深基坑开挖与邻近建筑物的相互影响及加固措施[J]. 建筑结构,2023,48(12):144-149.

YAO Xi XIA Changhua JIANG Ning LI Dezhi DING Baohua. Interaction between foundation pit excavation and adjacent buildings and reinforcement measures[J]. Building Structure,2023,48(12):144-149.

作者:姚希 夏长华 江宁 李德志 丁保华
单位:北京大学医学部基建工程处 建筑安全与环境国家重点实验室 中国建筑科学研究院有限公司地基基础研究所 北京市地基基础与地下空间开发利用工程技术研究中心 中国建筑技术集团有限公司
摘要:以邻近深基坑的既有建筑物加固改造为背景,分析了基坑开挖与邻近建筑物的相互影响,基坑的开挖造成建筑物倾斜或者开裂,邻近建筑物所施加的超载使基坑变形增大。对邻近建筑物采取隔断体保护、结构加固、地基基础加固措施;对基坑采取针对性的设计与施工:护坡桩+锚索+止水帷幕;建立施工过程监测预警系统。监测结果表明,桩顶水平、竖向位移累计最大值分别为13、7.38mm,小于控制值24mm;保留建筑物基础的最大沉降为18.1mm,基础倾斜0.44‰,远小于允许值3‰的规定;表明保留建筑物加固、基坑降水与支护的设计和施工是成功的。
关键词:邻近建筑物;基坑;相互作用;监测预警系统;加固;沉降;
作者简介:姚希,硕士,工程师,主要从事工程管理工作,Email:173562997@qq.com。夏长华,硕士,高级工程师,注册土木工程师(岩土),一级建造师,注册咨询工程师,主要从事岩土工程勘察、设计、施工及监测工作,Email:444591827@qq.com。
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参考文献[1] 郑翔,汤继新,成怡冲,等.软土地区地铁车站深基坑施工全过程对邻近建筑物影响实测分析[J].建筑结构,2021,51(10):128-134.
[2] 李辉.深基坑邻近建筑物的加固方法及加固机理研究[D].西安:西安科技大学,2011.
[3] 王卫东,徐中华.预估深基坑开挖对周边建筑物影响的简化分析方法[J].岩土工程学报,2010,32(S1):32-38.
[4] 郑刚,李志伟.不同围护结构变形形式的基坑开挖对邻近建筑物的影响对比分析[J].岩土工程学报,2012,34(6):969-977.
[5] MOORAK SON,CORDING EDWARD J.Estimation of building damage due to excavation induced ground movements[J].Journal of Geotechnical and Geoenvironmental Engineering,2005,131(2):162-177.
[6] 王明波.基坑工程与邻近建筑物相互影响的分析方法[J].工业建筑,2004,34(8):56-58.
[7] 徐长节,金飚,孙凤明,等.桩基施工及基坑开挖对邻近建筑物联合影响研究[J].岩土工程学报,2013,35(S2):809-813.
[8] 魏焕卫,孙剑平,陈启辉,等.复杂条件下邻近建筑物的保护和基坑支护[J].施工技术,2005,34(6):48-50.
[9] 姚可梅.邻近深基坑的既有建筑物基础加固[J].建筑监督检测与造价,2015,8(2):24-27.
[10] 魏冰冰.基坑开挖对邻近建筑物基础影响分析[J].科技创业家,2014(4):59.
[11] 龙林,李之达.长沙市某深基坑工程的监测及变形规律研究[J].建筑结构,2020,50(2):133-137.
[12] 黄军华,周志健,刘鑫坤,等.邻近运营地铁的深基坑开挖风险及控制措施[J].施工技术(中英文),2021,50(24):35-39.
[13] 建筑地基基础设计规范:GB 50007—2011[S].北京:中国建筑工业出版社,2012.
Interaction between foundation pit excavation and adjacent buildings and reinforcement measures
YAO Xi XIA Changhua JIANG Ning LI Dezhi DING Baohua
(Infrastructure Construction Department of Peking University Health Science Center State Key Laboratory of Building Safety and Built Environment China Academy of Building Research Foundation Institute Beijing Engineering Technology Research Center of Foundation and City Underground Space Development and Utilization China Building Technique Group Co., Ltd.)
Abstract: Based on the reinforcement and reconstruction of the existing building adjacent to the deep foundation pit, the interaction between the excavation of the foundation pit and the adjacent building was analyzed, the excavation of the foundation pit causes the building to tilt or crack, and the overload imposed by the adjacent building causes the deformation of the foundation pit to increase. The partition protection, structural reinforcement, foundation reinforcement measures were adopted for adjacent buildings. The targeted design and construction of the foundation pit was adopted: slope protection pile + anchor cable + water stop curtain. The construction process monitoring and early warning system was established. The monitoring results show that the maximum cumulative horizontal and vertical displacement of pile top are 13mm and 7.38mm respectively, which is less than the control value of 24mm. The maximum settlement of the reserved building foundation is 18.1mm and the foundation tilt is 0.44‰, which is far less than the allowable value of 3‰. It shows that the design and construction of retaining building reinforcement, foundation pit dewatering and supporting are successful.
Keywords: adjacent building; foundation pit; interaction; monitoring and early warning system; reinforcement; settlement
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