粉砂土地基既有超大基坑加深的支護技術(shù)及效果分析
李冰河
- 摘 要
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(浙江省建筑設(shè)計研究院，杭州 310006)［摘要］錢江國際時代廣場是位于杭州錢江新城粉砂土地區(qū)的超大型基坑。該基坑在圍護體設(shè)置完畢且開挖到6m時，地下室由2層改為3層。詳細介紹了基坑加深后如何合理利用原有圍護結(jié)構(gòu)及采取的其他有效技術(shù)措施。同時，結(jié)合實際工程詳細的監(jiān)測資料，對該工程基坑加深的支護技術(shù)及效果進行了深入分析。［關(guān)鍵詞］超大型基坑；加深；降水；監(jiān)測中圖分類號：TU463文獻標識碼：A文章編號：1002-848X(2011)05-0104-04Retaining scheme and effects of a large-scale deep pit with increasing depth on silty sand foundationLi Binghe(Zhejiang Province Architectural Design and Research Institute, Hangzhou 310006, China)Abstract:Qianjiang International Time Square project is built on silty sand foundation with a large scale deep pit in Hangzhou CBD. The basement was changed from two-floors to three-floors after the pit had been excavated in the depth of 6m. The design process of the retaining structure was introduced in detail. It is proved that the scheme is reasonable and economical for utilizing the original retaining structure.Keywords:large-scale deep excavation；increasing the excavation depth；dewatering； monitoring作者簡介：李冰河，教授級高級工程師，Email:libinghe2009@qq.com。參考文獻［1］浙江大學建筑設(shè)計研究院. 錢江國際時代廣場工程巖土工程勘察報告［R］. 2005.［2］浙江浙峰工程咨詢有限公司. 杭州錢江國際時代廣場基坑圍護工程設(shè)計［R］. 2006.［3］浙江省建筑設(shè)計研究院. 杭州錢江國際時代廣場基坑支護設(shè)計說明［R］. 2007.［4］浙江大學巖土工程研究所. 杭州錢江國際時代廣場基坑開挖監(jiān)測總結(jié)報告［R］. 2008.
