微型钢管桩加H型钢支护在某深基坑工程中的应用.pdf

施工技术 2011年4月上 24 CONSTRUCTION TECHNOLOCY 第40卷第338期 微型钢管桩加H型钢支护在某深基坑工程中的应用 张艳芬,莫海军2,叶晓红2 (1.广东科学技术职业学院建工学院,广东珠海519090;2.澳门龙昌建筑工程有限公司,澳门) 摘要】澳门交通局大楼工程设有3层地下车库,与既有建筑地下车库及市政主干道最小距离仅为1.5m施工中 采用以219mm微型钢管为竖向围护,以H型钢设置水平支撑兼作施工栈桥,开挖面挂网喷浆护壁的支护方法。 对该支护系统进行了受力及变形分析,介绍了施工工艺及监测方法。工程结果表明,该方案较好地解决了开挖边 坡的稳定性问题,保证了既有建筑的安全和正常使用。 【关键词微型钢管桩;H型钢支推;深基坑施工监测 [中图分类号】TU753.3 文献标识码】A 文章编号】1002-8498(2011)07-0024-03 Application of Mini Steel Tube Piles and H-beam Support in Some Deep Foundation Excavation Zhang Yanfen' ,Mo Haijun ,Ye Xiaohong ( 1.College of Engineering and Architecture ,Guangdong Institute of Science and Technology Zhuhai ,Guangdong 519090 ,China :2 .Long Cheong Construction Co .Lid .Macao ,China ) Abstract :Macao Department of Transportation Building has three stories of basement ,which is close to the existing basement and municipal trunk road and the minimum distance is 1 .5 meters .Mini steel pipe piles and H-beam support system are adopted in excavation .Stress and deformation analysis are carried out and construction technology and monitoring method are described .Engineering practice shows that the excavation slope stability is well guaranteed ,and the existing buildings are saf...