空间错位双排密贴PHC桩支护结构分析  

Analysis of retaining structure with space double-row layout dislocation PHC piles

作　　者：丁江澍[1,2] 刘伯权[1] 冼耀强[1,3] 

机构地区：[1]长安大学建筑工程学院,陕西西安710061 [2]佛山市建筑工程质量检测站,广东佛山528000 [3]招商局地产控股股份有限公司,广东佛山528000

出　　处：《长安大学学报（自然科学版）》2010年第4期66-71,共6页Journal of Chang’an University(Natural Science Edition)

基　　金：佛山市科技专项发展基金(2007055B)

摘　　要：基于软土地区某基坑工程的设计实践,引入等代刚度的概念,采用单排桩模拟由2种不同桩型组成的空间错位布置双排桩支护体系,对空间错位排列双排密贴PHC桩支护结构进行三维有限元分析。结果表明:等代单排桩的最大弯矩基本上等于双排桩支护结构前后两排桩弯矩之和,且两者的位移最大值、最小值出现的位置和位移的整体分布形式都大致相同,其计算精度能够满足工程设计的要求;该方法可以简化此类结构水平位移及弯矩的计算,并为同类工程的施工设计提供参考。Based on the design practice of foundation ditches in soft soil district and the concept of equivalent rigidity,one-row piles was used to simulate the retaining structure with space double-row layout dislocation PHC piles.The characteristics of internal force and lateral displacement of space double-row layout dislocation PHC piles were analyzed by FEM.The results show that the maximal bending moment of the one-row piles is nearly equal to the sum of the bending moment of the front piles and the bending moment of the back piles.The maximal displacement,the location of the maximal displacement,and the distributing form of displacement of the two retaining structures are all approximately sameness.The calculation accuracy can meet the design requirement.The method can simplify the calculation of the horizontal displacement and the bending moment in such structures while provide reference to the construction design of similar projects.4 tabs,15 figs,10 refs.

关 键 词：结构工程 空间错位 双排PHC桩 等代刚度 软土 基坑支护 

分 类 号：TU470[建筑科学—结构工程]