地下连续墙深基坑支护结构中钢支撑性能研究  

Research on performance of steel support in supporting structure for underground continuous wall of deep foundation

作　　者：吴小涛[1,2] 周文[1] 袁丽佳[1] 彭修宁[1] 

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]郑州大学综合设计研究院有限公司,河南郑州450002

出　　处：《广西大学学报（自然科学版）》2015年第1期193-201,共9页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51168002)

摘　　要：为了研究地下连续墙中钢支撑的受力和变形性能,通过一工程实例,在数值模拟的基础上,从支撑的最大轴力、地下连续墙的最大变形以及地表沉降值等三方面验证支护方案的可行性;研究了预加轴力的施加对钢支撑的支护效果所产生的影响,得出预加轴力的合理数值;进一步对钢支撑基坑支护方案进行优化,从而将钢支撑轴力的使用效率由目前工程实践中的25%左右提高到39.5%,并提出了提高钢支撑轴力使用效率的途径。The mechanical properties of steel supports for underground continuous wall are studied based on an engineering project,and a numerical simulation.Firstly,the feasibility of supporting scheme is verified from three indexes,maximum axial force of the support,maximum deformation of underground continuous wall and surface subsidence values; secondly,the impact of pre axial force on supporting structure is analyzed,and a reasonable value of the force is obtained; Thirdly,the steel support excavation program is further optimized,which improves the efficiency of steel support axial forces from current about 25% up to 39.5% and puts forward some approaches to improve efficiency of the support force.

关 键 词：深基坑支护 地下连续墙 钢支撑 使用效率 优化设计 

分 类 号：TU942[建筑科学—建筑技术科学]