基于MIDAS/GTS的单支点内撑式排桩结构的力学变形特性研究  

Study on Mechanics and Deformation Characteristic of Single Fulcrum of Row Piles Structure with Inner Support Based on MIDAS/GTS

作　　者：肖桃李[1,2] 汪中林[1] 程成[1] 黄梅[1] 何云龙[1] 

机构地区：[1]长江大学城市建设学院,湖北荆州434023 [2]长江大学岩土力学与工程研究中心,湖北荆州434023

出　　处：《施工技术》2018年第1期50-53,59,共5页Construction Technology

基　　金：国家自然科学基金资助项目(51274157);湖北省自然科学基金项目(2015CFB667);湖北省教育厅科学技术研究项目(Q20141307)

摘　　要：施工开挖阶段,土体平衡破坏,支护结构变形对深基坑安全性能影响显著。针对单支点内撑式排桩支护结构,基于MIDAS/GTS软件,建立三维有限元分析模型,探讨支护结构的力学变形特性。同时结合基坑监测技术,将实测结果与数值模拟结果进行比较分析。结果表明,数值模拟结果与现场监测数据的变化规律基本一致,并且通过进一步研究得到支护结构最大位移值、最大位移和最大弯矩作用点与开挖深度的关系。In the excavation stage, when soil mass balance is damaged, deep foundation excavation safety is significantly influenced by the supporting structure. Based on the MIDAS/GTS, the three-dimension finite element model for the single fulcrum of row piles structure with inner support was established, to discuss the mechanics and deformation characteristic of supporting structure. And combined fbundation excavation monitoring technology, practical monitoring results and the numerical simulation results are analyzed in comparison. The research results show that the results of numerical sinmlation are almost consistent with the changing rule of the monitoring data, and the maximum displacement of retaining structure, the maximum displacement and maximum bending point are obtained by further study on the relationship with the depth.

关 键 词：深基坑 支撑 内撑式排桩结构 数值分析 变形 研究 

分 类 号：TU753[建筑科学—建筑技术科学]