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(1 浙江省建筑設(shè)計研究院, 杭州 310006; 2 浙江盛院建設(shè)工程施工圖審查中心, 杭州 310006;3 北京城建設(shè)計發(fā)展集團(tuán)股份有限公司杭州分公司, 杭州 310017)
摘要: 杭州中心項目位于杭州市武林廣場核心商圈,設(shè) 6 層地下室,基坑開挖深度約 30. 2 ~ 36. 0m,緊鄰地鐵 1 號線和 3 號線盾構(gòu)隧道。 針對該工程所面臨的深厚軟土深大基坑變形控制和敏感設(shè)施保護(hù)難題,綜合采取了地下室平面及豎向優(yōu)化布置、分坑施工、軟土?xí)r空效應(yīng)定量控制等多種技術(shù)。 介紹了該項目基坑支護(hù)設(shè)計與施工要點,總結(jié)了該深大基坑施工過程中的圍護(hù)體系和鄰近地鐵設(shè)施的變形發(fā)展規(guī)律,分析了軟土地基超深基坑變形性狀。 結(jié)果表明,地下結(jié)構(gòu)施工全部完成后成功地將鄰近盾構(gòu)隧道的水平變形、豎向變形及水平收斂變形均控制在 5mm 之內(nèi),滿足要求。
關(guān)鍵詞: 深厚軟土; 深大基坑; 時空效應(yīng); 分坑施工; 地鐵保護(hù)
中圖分類號:TU470 文獻(xiàn)標(biāo)志碼:A 文章編號:1002-848X(2022)15-0136-06
DOI:10. 19701 / j. jzjg. ZIAD2226
Control technology for the influence of deep and large foundation pit of 6-story basement indeep soft soil on adjacent subway tunnels
LIU Xingwang1, LI Binghe1, CHEN Weilin2, MAO Haihe3, ZHANG Ge3, SUN Zhengbo1
(1 Zhejiang Province Institute of Architectural Design and Research, Hangzhou 310006, China;2 Zhejiang Shengyuan Construction Engineering Construction Drawing Review Center, Hangzhou 310006, China;3 Hangzhou Branch of Beijing Urban Construction Design and Development Group Co. , Ltd. , Hangzhou 310017, China)
Abstract: Hangzhou Center project is located in the core business district of Hangzhou Wulin Plaza, with a 6-storeybasement. The excavation depth of the foundation pit is about 30. 2 ~ 36. 0m, close to the shield tunnel of Metro Line 1 andLine 3. In view of the difficult problems of deformation control and sensitive facilities protection of the deep and largefoundation pit in deep soft soil faced by this project, the design has comprehensively adopted a variety of measures such asthe optimization of basement plane and vertical layout, pit-dividing construction and quantitative control of soft soilspace-time effect. The key points of foundation pit support design and construction of the project was introduced, thedeformation development law of the retaining system and adjacent subway facilities during the construction of the deep andlarge foundation pit was summarized, and the deformation behavior of super deep foundation pit in soft soil foundation wasanalyzed. The results show that after the construction completion of underground structure, the horizontal deformation,vertical deformation and horizontal convergence deformation of adjacent shield tunnel are successfully controlled within5mm, which meets requirement.
Keywords:deep soft soil; deep and large foundation pit; space-time effect; pit-dividing construction; subway protection
∗浙江省建設(shè)科研項目(2018K119) ,浙江省科技創(chuàng)新項目(2019R52035) 。
第一作者:劉興旺,博士,正高級工程師,浙江省工程勘察設(shè)計大師,主要從事巖土工程的科研和設(shè)計工作,Email:1125997382@ qq. com。
[引用本文] 劉興旺,李冰河,陳衛(wèi)林,等. 深厚軟土 6 層地下室深大基坑對鄰近地鐵隧道影響控制技術(shù)[ J] . 建筑結(jié)構(gòu),2022,52(15) :136-141. LIU Xingwang,LI Binghe,CHEN Weilin,et al. Control technology for the influence of deepand large foundation pit of 6-story basement in deep soft soil on adjacent subway tunnels [ J] . Building Structure,2022,52(15) :136-141.
