高层建筑深基坑开挖阶段围护桩变形特性分析  

ANALYSIS ON DEFORMATION CHARACTERISTICS OF RETAINING PILES IN DEEP FOUNDATION PIT EXCAVATION STAGE OF HIGH-RISE BUILDING

作　　者：光辉[1] 孙建超[1] 唐超 

机构地区：[1]郑州升达经贸管理学院,郑州450000 [2]苏州市民用建筑设计院有限公司,江苏苏州215000

出　　处：《建筑技术》2017年第9期964-967,共4页Architecture Technology

基　　金：河南省2017年科技计划项目(172400410122)

摘　　要：以某高层建筑深基坑施工为研究背景,根据基坑围护方案、监测方案等资料,结合监测数据,分析基坑开挖阶段围护桩的变形特性。结果表明基坑施工期围护桩的累计深层水平位移主要发生在土方开挖阶段;随基坑开挖深度增加及混凝土支撑的浇筑,围护桩的变形曲线由前倾型逐渐向弓形变化,累计深层水平位移量随之增大,最大累计位移发生位置也下移;随着测次增加,桩身第1道支撑位置的累计深层水平位移值较小,而第2,3道支撑及坑底位置的变形值呈现波动性增长趋势,围护桩变形最大的关键部位出现在桩身第3道支撑位置。Based on the deep foundation pit construction of a high-rise building as the research background, according to the foundation pit support programs, monitoring programs and other information, combined with monitoring data, focusing on analysis of the deformation characteristics of the retaining pile foundation excavation stage. The results show that： During the construction of the foundation pit retaining pile accumulated deep horizontal displacement occurs mainly in the earthwork excavation stage; With the excavation depth increases and the supports of concrete pouring, retaining pile deformation curve by forward type gradually changes to bow, accumulated deep horizontal displacement increases, the maximum cumulative displacement position move downstream; With increasing measurement times, pile first support position cumulative horizontal displacement of the deep value smaller, and the second and the third support and bottom position of deformation values show the volatility of trend growth, retaining pile deformation of key parts in pile third support position. The research results have certain reference value for the design and construction of other similar excavation works.

关 键 词：深基坑 围护桩 变形规律 

分 类 号：TU94[建筑科学—建筑技术科学]