基坑逆作施工的若干技術(shù)問題探討
劉傳平，黃斌
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(同濟大學(xué)建筑設(shè)計研究院，上海 200092)［摘要］結(jié)合民德花苑工程深基坑采用逆作法工藝設(shè)計和施工的實踐，探討了基坑逆作施工的結(jié)構(gòu)受力機理和特點，及地下墻與立柱間差異沉降的控制措施。在工程施工實踐的基礎(chǔ)上對逆作施工中的墻、柱、梁、板等節(jié)點設(shè)計進行了優(yōu)化，提出了基于樁基承臺受力模式的托板取代托梁的節(jié)點做法，降低了基坑工程的逆作法施工的難度。［關(guān)鍵詞］深基坑;逆作法;節(jié)點設(shè)計Discussions on Technology of Foundation Pit by Top-down MethodLiu Chuanping, Huang Bin(Architectural Design & Research of Tongji University,Shanghai 200092,China)Abstract:Combined with the practice of Min De Hua Yuan project which is designed and constructed by top-down method,it discussed the structure bearing force mechanism and characteristic on top-down method and the measure controlling the difference settlement between diaphragm wall and post,optimized the joint design of wall,post,beam and shell depending on the construction practice of top-down project,put forward the joint method which was based on the mode of pile foundation cap by replacing the joist to splint.The method predigests the operation difficulty which is constructed by top-down method.Keywords:deep foundation pit; top-down method; joint design作者簡介：劉傳平(1966-)，男，學(xué)士，高級工程師，E-mail:liuchuanping@126.com。參考文獻［1］徐至鈞,趙錫宏. 逆作法設(shè)計與施工［M］. 北京:機械工業(yè)出版社,2002.［2］上海市工程建設(shè)規(guī)范、地基基礎(chǔ)設(shè)計規(guī)范(DGJ08—11—1999)［S］.1999.［3］上海市建設(shè)委員會科學(xué)技術(shù)委員會. 上海大型市政工程設(shè)計與施工叢書［M］. 上海:上?？茖W(xué)與技術(shù)出版社,1998.［4］賈堅. 逆作開挖深基坑控制卸載變形的方法與實踐［J］. 巖土工程學(xué)報,2007,29(2).
