武汉绿地中心深基坑的特殊工程地质条件及支护体系选择研究  

Special Engineering Geological Conditions and Selection on Support System of Deep Foundation Pit in Wuhan Greenland Center

作　　者：黄正凯 王旋 付强 汪洋[1] HUANG Zheng-Kai;WANG Xuan;FU Qiang;WANG Yang(China University of Geosciences,Wuhan 430074,Hubei,China;The Second Construction Co.Ltd.of China Construction Third Engineering Bureau,Wuhan 430074,Hubei,China)

机构地区：[1]中国地质大学(武汉),武汉430074 [2]中建三局第二建设工程有限责任公司,武汉430074

出　　处：《华南地质与矿产》2019年第4期488-496,共9页Geology and Mineral Resources of South China

摘　　要：高承压水条件下深基坑工程的支护与施工是当前国内外城市建设的难点问题。本文针对武汉绿地中心深基坑超大超深、场地土体工程性质差、高承压水且水量丰富等特点,对深基坑常用的支护体系进行了比选分析,确定了地下连续墙支护体系作为武汉绿地中心深基坑支护的主体围护结构,设计了左右两个区先施工及中间区后施工的分区施工方法,并提出了地下连续墙外围接缝处采用高压旋喷桩进行加固止水、基坑内部采用地下连续墙和钻孔灌注桩隔断支护、基坑内侧采用钢筋混凝土水平支撑和钢立柱竖向支撑的多层次支护体系。成果对长江经济带中下游城市的深基坑设计和施工具有重要的借鉴意义。The support and construction of deep foundation pit under the condition of high confined water is a difficult problem in urban construction at home and abroad. Based on the characteristics such as super-large and super-deep foundation pit, poor engineering properties of site soil, high pressure and abundant water of confined aquifer of Wuhan Greenland Center, the common support systems for deep foundation pit are compared, and the underground continuous wall support system is determine as the main support construction of the deep foundation pit. The overall plan of partition construction is designed, which is the left and right sections are constructed first, and the middle zone section is constructed later. Multi-level support system,including high-pressure rotary jet grouting piles for preventing seepage on the outside of slot joints of underground continuous wall, underground continuous wall and bored piles for partition support in deep foundation pit, horizontal reinforced concrete internal support and vertical steel column support inside the foundation pit,is proposed. The results have important reference significance for the design and construction of deep foundation pit in the middle and lower reaches of Yangtze River Economic Belt.

关 键 词：武汉绿地中心 深基坑 地下连续墙 钢筋混凝土内支撑 

分 类 号：P642[天文地球—工程地质学] TU753[天文地球—地质矿产勘探]