- 摘 要
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(1 北京大學(xué)醫(yī)學(xué)部基建工程處, 北京 100191; 2 建筑安全與環(huán)境國家重點實驗室, 北京 100013;3 中國建筑科學(xué)研究院有限公司地基基礎(chǔ)研究所, 北京 100013; 4 北京市地基基礎(chǔ)與地下空間開發(fā)利用工程技術(shù)研究中心, 北京 100013; 5 中國建筑技術(shù)集團(tuán)有限公司, 北京 100013)
摘要: 以鄰近深基坑的既有建筑物加固改造為背景,分析了基坑開挖與鄰近建筑物的相互影響,基坑的開挖造成建筑物傾斜或者開裂,鄰近建筑物所施加的超載使基坑變形增大. 對鄰近建筑物采取隔斷體保護(hù)、結(jié)構(gòu)加固、地基基礎(chǔ)加固措施;對基坑采取針對性的設(shè)計與施工:護(hù)坡樁+錨索+止水帷幕;建立施工過程監(jiān)測預(yù)警系統(tǒng). 監(jiān)測結(jié)果表明,樁頂水平、豎向位移累計最大值分別為 13、7. 38mm,小于控制值 24mm;保留建筑物基礎(chǔ)的最大沉降為18. 1mm,基礎(chǔ)傾斜 0. 44‰,遠(yuǎn)小于允許值 3‰的規(guī)定;表明保留建筑物加固、基坑降水與支護(hù)的設(shè)計和施工是成功的.
關(guān)鍵詞: 鄰近建筑物; 基坑; 相互作用; 監(jiān)測預(yù)警系統(tǒng); 加固; 沉降
中圖分類號:TU318. 1 文獻(xiàn)標(biāo)志碼:A 文章編號:1002-848X(2023)12-0144-06
DOI:10. 19701 / j. jzjg. 20222663
Interaction between foundation pit excavation and adjacent buildings and reinforcement measures
YAO Xi1, XIA Changhua2,3,4, JIANG Ning2,3,4, LI Dezhi5, DING Baohua5
(1 Infrastructure Construction Department of Peking University Health Science Center, Beijing 100191, China;2 State Key Laboratory of Building Safety and Built Environment, Beijing 100013, China; 3 China Academy of BuildingResearch Foundation Institute, Beijing 100013, China; 4 Beijing Engineering Technology Research Center of Foundationand City Underground Space Development and Utilization, Beijing 100013, China; 5 China Building Technique GroupCo. , Ltd. , Beijing 100013, China)
Abstract:Based on the reinforcement and reconstruction of the existing building adjacent to the deep foundation pit, theinteraction between the excavation of the foundation pit and the adjacent building was analyzed, the excavation of thefoundation pit causes the building to tilt or crack, and the overload imposed by the adjacent building causes the deformationof the foundation pit to increase. The partition protection, structural reinforcement, foundation reinforcement measures wereadopted for adjacent buildings. The targeted design and construction of the foundation pit was adopted: slope protectionpile + 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 and7. 38mm respectively, which is less than the control value of 24mm. The maximum settlement of the reserved buildingfoundation is 18. 1mm and the foundation tilt is 0. 44‰, which is far less than the allowable value of 3‰. It shows that thedesign 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
第一作者:姚希,碩士,工程師,主要從事工程管理工作,Email:173562997@ qq. com.
[引用本文] 姚希,夏長華,江寧,等. 深基坑開挖與鄰近建筑物的相互影響及加固措施[ J]. 建筑結(jié)構(gòu),2023,53(12):144-149. YAO Xi,XIA Changhua,JIANG Ning,et al. Interaction between foundation pit excavation and adjacentbuildings and reinforcement measures[J]. Building Structure,2023,53(12):144-149.
