2016年9月上 施工技术 第45卷第17期 CONSTRUCTION TECHNOLOGY 29 D0I:10.7672/8gjs2016170029 南宁软岩地区桩锚支护深基坑工程实例研究 王刚1，熊宗海2 3，冯建东1，韩建川，尹凯丽3 (1.湖北中南勒察基础工程有限公司，湖北武汉430081；2.中国地质大学（武汉）工程学院， 湖北武汉430074；3.武汉丰达地质工程有限公司，湖北武汉430074) [摘要]介绍了预应力锚索支护体系在南宁软岩地区基坑项目应用中的基坑设计及施工注意事项，并进行了计算 成果分析及变形监测成果分析等工作.通过分析，得出工程软岩具有特殊的工程力学特性；工程软岩强度随深度 增加而衰减，基坑侧壁表现为“悬臂式”变形趋势以及明显的“坑角效应”；软岩基坑坑底岩体能提供较大抗力；“抱 柱”结合预应力桩锚的联合支护体系可有效控制支护结构变形等成果. [关键词]深基坑；软岩；桩错支护；设计；施工技术；变形；监测 [中图分类号]TU753;TU475.9 [文献标识码]A [文审编号]1002-8498(2016)17-0029-06 Case Study on Deep Foundation Excavation Engineering with Pile Anchor Supporting System in Soft Rock Area of Nanning Wang Gang' Xiong Zonghai. Feng Jiandong' Han Jianchuan' Yin Kaili' (1.Hubei Central South Exploration Foundation Engineering Co.Lad.Wuhan Hubei 430081.China: 2.Faculty of Engineering China University of Geosciences Wuhan Hubei 430074 China; 3.Wuhan Fengda Geological Engineering Co.Lad.Wuhan Hubei 430074 China) Abstract:In this paper important matters of design and construction of foundation excavation with prestressed anchor cable supporting system in soft rock area of Nanning were introduced.And analysis of the calculation results and the deformation monitoring was carried out.The results mainly show that:soft rock has special engineering mechanical properties;soft rock strength is weakened with the increase of depth;the lateral wall of the foundation excavation is shown as‘cantilever'deformation trend and apparent‘corner effect';the bottom rock of soft rock foundation excavation can ...
南宁软岩地区桩锚支护深基坑工程实例研究.pdf
