施工技术 2010年1月 14 CONSTRUCTION TECHNOLOGY 第39卷第1期 天津津塔工程超大深基坑施工技术 田贺维，周予启，刘卫未 (中建一局集团建设发展有限公司，北京100012) [摘要]天津津塔工程建筑高度336.9m 是目前华北地区最高建筑.其基坑面积19764m2 基坑开挖深度达 -32.1m.工程整体采用顺作法.周边围护结构采用两墙合一的地下连续墙和双圆环钢筋混凝土内支撑体系，支 撑立柱采用钻孔灌注桩内插角钢格构柱形式.止水帷幕和基底加固采用高压旋喷桩，解决了基坑抗渗和土体加固 问题；大小环岛式土方开挖技术配合旋转坡道，解决了土层软且基坑开挖深度深问题；支撑结构“闷拆保证了主体 结构正常向上施工；信息化手段可保证及时调整施工方案，保证超大、超深基坑安全稳定施工. [关键词]天津津塔；基坑；地下连续墙；双圆环内支撑；高压旋喷桩；信息化 [中图分类号]TU753.1 [文献标识码]A[文章编号]1002-8498(2010)01-0014-08 Construction Technology of Super Large and Deep Foundation Excavation in Tianjin Tower Tian Hewei Zhou Yuqi Liu Weiwei (China Construction First Division Group Construction Development Co.Ltd.Beijing 100012 China) Abstract:Tianjin Tower with height of 336.9 meters is the highest building in North China whose foundation excavation area is 19 764 square meters and excavation depth is 32.1 meters.Sequential construction method is adopted in integral structure.Diaphragm wall is used as surrounding structure during construction and external wall of basement when the project is pleted.Furthermore the double circle reinforced concrete internal support is decided and bored piles filled with angle iron lattice column are used as support column.Moreover some other technologies are used to solve special problems in the project such as high-pressure jet grouting piles as water-proofing curtain and foundation reinforcement; excavating soil in island ring pounding with rotating slopes to solve problems of soft soil and deep foundation excavation;clo...
天津津塔工程超大深基坑施工技术.pdf
