多支点预应力锚索桩结构计算与测试分析  

Structural Calculation and Test Analysis of Multi-pivot Prestressed Anchor Pile

作　　者：陈占[1] 

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《路基工程》2010年第3期111-114,共4页Subgrade Engineering

摘　　要：根据悬臂梁挠曲变形理论、横向变形约束弹性地基梁理论及桩索变形协调原理,提出了考虑各锚索支点施工工况影响系数进行土质地层多支点预应力锚索桩的设计方法;结合工程实施,对桩背与板后土压力、锚索拉力、桩身位移等进行了现场测试和分析研究;验证了桩背土压力受锚索约束影响呈梯形分布、板后土压力为三角形分布的应力图形;证明了考虑工况影响系数进行多支点预应力锚索桩设计的合理性和可行性。According to deflection deformation theory of cantilever beam,foundation beam lateral deformation elastic restraint theory and pile cable deformation coordination principle,this paper puts forward the design method of multi-pivot anchor pile for soil strata considering the influence factors of anchor pivot construction condition,and carries out site test and analytic study on pile-back and plate-back soil pressure,anchor cable stress and pile body displacement,which verifies that anchor cable stress on pile-back soil pressure is in trapezoidal distribution and that on plate-back soil pressure is in triangle distribution,and proves the reasonability and feasibility of construction with multi-pivot prestressed anchor pile considering working condition influence factors.

关 键 词：多支点锚索桩 工况影响系数 土压力 位移 锚索拉力 

分 类 号：TU457[建筑科学—岩土工程]