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(浙江省建筑設(shè)計(jì)研究院, 杭州 310006)

摘要: 井筒式地下立體車(chē)庫(kù)占地面積小、開(kāi)挖深度大、停車(chē)數(shù)量多,適用于解決老舊城區(qū)停車(chē)難。 首先在介紹先后建成的 3 個(gè)工程案例的結(jié)構(gòu)形式和監(jiān)測(cè)數(shù)據(jù)后,總結(jié)超深地下立體車(chē)庫(kù)結(jié)構(gòu)計(jì)算的主要問(wèn)題;然后以開(kāi)挖深度為 46. 2m 的杭州景芳園項(xiàng)目為例,分別利用三維連續(xù)介質(zhì)有限元方法建立的地基-結(jié)構(gòu)模型和結(jié)構(gòu)-荷載模型,分析空間效應(yīng)對(duì)結(jié)構(gòu)的影響;最后以監(jiān)測(cè)數(shù)據(jù)為參照,通過(guò)對(duì)比不同插入深度地下連續(xù)墻的內(nèi)力和變形,分析有限元法和彈性支點(diǎn)法的計(jì)算精度。 分析結(jié)果表明:井筒式地下立體車(chē)庫(kù)結(jié)構(gòu)可綜合沉井和明挖地下室的做法,結(jié)合地下水處理和結(jié)構(gòu)內(nèi)力變形,選擇合適的支護(hù)結(jié)構(gòu)插入深度;對(duì)地下連續(xù)墻墻身最大彎矩和最大水平位移而言,三維有限元計(jì)算值是實(shí)測(cè)值的 1. 25 倍以上,彈性支點(diǎn)法計(jì)算值是實(shí)測(cè)值的 2 倍左右。

關(guān)鍵詞: 井筒式地下立體車(chē)庫(kù); 超深地下立體車(chē)庫(kù); 空間效應(yīng); 插入深度; 逆作法; 地下連續(xù)墻

中圖分類(lèi)號(hào):TU470+. 3 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2022)15-0146-07

DOI:10. 19701 / j. jzjg. ZIAD2225

Study on calculation method of ultra-deep underground shaft-type stereo garage structure

LI Ying, XIE Xirong, LIU Xingwang, CHEN Dong, TONG Xing, ZHANG Jinhong

( Zhejiang Province Institute of Architectural Design and Research, Hangzhou 310006, China)

Abstract: The underground shaft-type stereo garage has the obvious characteristics of small plane area, large excavationdepth and large number of parking, which was helpful to solve the problem of parking difficulty in old residential areas anddowntown areas. Firstly, after introducing the structural types and monitoring data of three engineering cases completedsuccessively, the main problems in the calculation of ultra-deep underground stereo garage structure were summarized.Then, taking Hangzhou Jingfangyuan project with excavation depth of 46. 2m as study background, the foundation-structuremodel and the structure-load model established by the three-dimensional continuum finite element method were respectivelyused to analyze the influence of the space effect on the structure. Finally, using the monitoring data as a reference, thecalculation accuracy of the finite element method and the elastic fulcrum method were analyzed by comparing the internalforce and deformation of the underground diaphragm wall with different insertion depths. The analysis results showed thatunderground shaft-type stereo garage structure should integrate with the practice of caisson and open excavation basement toselect the appropriate excavation method and insertion depth of retaining structure by combined with groundwater treatmentand structural stress and deformation. For the maximum bending moment and maximum horizontal displacement ofunderground diaphragm wall, the calculation value of the three-dimensional finite element was more than 1. 25 times of themeasured value, and the calculation value of the elastic fulcrum method was about 2 times of the measured value.

Keywords:underground shaft-type stereo garage; ultra-deep underground stereo garage; space effect; insertion depth;inverse building method; underground diaphragm wall

∗國(guó)家自然科學(xué)基金(52078466) ,浙江省建設(shè)科研項(xiàng)目(2019K002、2019K003、2020K110) 。

第一作者:李瑛,博士,正高級(jí)工程師,注冊(cè)土木工程師(巖土) ,主要從事深基坑工程的設(shè)計(jì)、咨詢(xún)和研究,Email: liying3104@163. com。

[引用本文] 李瑛,謝錫榮,劉興旺,等. 井筒式超深地下立體車(chē)庫(kù)結(jié)構(gòu)計(jì)算方法研究 [ J] . 建筑結(jié)構(gòu),2022,52(15) : 146-152. LI Ying, XIE Xirong, LIU Xingwang, et al. Study on calculation method of ultra-deep undergroundshaft-type stereo garage structure[ J] . Building Structure,2022,52(15) :146-152.