预应力锚杆复合土钉支护三维非线性分析  

Three dimensional nonlinear analysis of composite prestressed anchor and soil-nail retaining structure

作　　者：黄建华[1] 

机构地区：[1]福建工程学院土木工程系,福建福州350108

出　　处：《福建工程学院学报》2010年第4期326-331,共6页Journal of Fujian University of Technology

基　　金："十一五"国家科技支撑计划项目(2008BAJ06B01-5)

摘　　要：应用三维非线性有限元分析通用软件,对基坑工程中采用预应力锚杆复合土钉支护和单纯土钉支护2种支护方式进行数值模拟分析,包括分步土方开挖、土钉安设与面层制作等全过程的施工模拟,对同等工况下的单纯土钉支护和预应力锚杆复合土钉支护进行力学性状比较,包括坑外土层张拉应力区分布、变形特征、支护坑壁力学特征和土钉与锚杆拉力分布等方面的差异性,并结合复合土钉支护基坑工程应用情况,系统地研究了预应力锚杆复合土钉支护作用机理及其工作性能。The mechanism of composite pre-stressed anchor and soil-nail retaining structure in foundation-pit engineering were analysed using general 3-D nonlinear numerical simulation software.The simulation of the whole construction process included excavation by steps,soil nailing installation and panel manufacture.Mechanical characteristics comparison between the pure soil-nail and composite soil-nail retaining structure（slope） under the same engineering condition was conducted.The comparison involved differences in tension distribution range of soil layers,deformation features,mechanical characteristics of support and axial force distribution along the nail.The action mechanism and working performance of soil-nail retaining support were systematically studied with combination of practical foundation-pit projects.

关 键 词：基坑工程 预应力锚杆 复合土钉支护 有限元分析 

分 类 号：TU476[建筑科学—结构工程]