Application and development of new technology for support of deep excavations in coastal areas of Zhejiang
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摘要: 浙江沿海大多为典型的深厚淤泥质软弱土地基。随着城市建设的发展，地下空间开发和利用得到快速发展，地下空间建造规模越来越大，基坑工程设计和施工面临“越挖越深、越挖越大、周边环境越挖越复杂”的发展趋势，在这超深超大基坑工程的背后，离不开基坑支护新技术的应用和发展。归纳列举了近年来浙江沿海软土地基设计建造的3～5层地下室的典型案例；介绍了地下连续墙“二墙合一”、超深止水帷幕防渗墙、地下障碍物处理、新型锚杆（锚索）、深层承压水处理、“逆作法”等基坑支护新技术的应用和最新进展。Abstract: The coastal areas of Zhejiang are mostly occupied by typical thick silt soft subsoil. The underground space has been rapidly developed and maximized in use as the development of urban construction. The scale of underground structure becomes larger than ever. The design and construction of excavations are facing the issues such as deeper and deeper excavation, more and more massive excavation and more and more complicated surroundings. The construction of super-deep and super-massive excavations needs the application and development of new technology for their support. The author lists 3～5-floor basement structures which are recently designed and constructed in the coastal areas of Zhejiang and also introduces the application and progress of new technology for support of deep excavation, including “two walls into one” diaphragm wall, ultra-deep waterproofing curtain and cut-off wall, underground obstacle disposal, new anchor and cable, deep confined water treatment and top-down construction method, etc.
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[1] 杨学林, 等. 地下连续墙“二墙合一”技术在粉砂土地基中的应用研究[J]. 岩土工程学报, 2006, 28(增刊1): 1724–1729. (YANG Xue-lin. Study on diaphragm wall and its application in silt and sand ground[J]. Chinese Journal of Goetechnical Engineering, 2006, 28(S1): 1724–1729. (in Chinese)) [2] GB50007—2011建筑地基基础设计规范[S]. 北京: 中国建筑工业出版社, 2011. (GB50007—2011 Code for design of building foundation[S]. Beijing: China Architecture and Building Press, 2011. (in Chinese)) [3] 杨学林, 周平槐. 逆作地下室设计中的若干关键问题[J]. 岩土工程学报, 2010, 32(增刊1): 238–244. (YANG Xue-lin, ZHOU Ping-huai. Some key problems in the design of basements using top-down method[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(S1): 238–244. (in Chinese))（本文责编 李运辉）
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