锚杆参数对基坑坑底回弹和地连墙变形的影响  

Impacts of Bolt Parameters on Pit Bottom Rebound and Ground Wall Deformation

作　　者：高磊[1] 王福彬[1,2] 余湘娟[1] 

机构地区：[1]河海大学土木与交通学院,江苏南京210098 [2]南京市市政设计研究院有限责任公司,江苏南京210008

出　　处：《水利与建筑工程学报》2013年第6期55-59,110,共6页Journal of Water Resources and Architectural Engineering

基　　金：河海大学中央高校基本科研业务费专项资金项目资助(2012B02314);中国博士后科学基金资助项目(2012M511193);江苏省博士后科研资助计划项目(1102073C);高等学校博士学科点专项科研基金(20120094120015)

摘　　要：采用三维有限元方法建立了考虑土、围护结构和锚杆支撑体系共同作用的复杂基坑模型,研究了锚杆的长度、倾角和间距对坑底回弹和地连墙变形的影响。研究结果表明:基坑坑底回弹隆起具有明显的空间效应,与地连墙的变形有关;锚杆的倾角、锚固段和自由段长度对坑底回弹隆起的影响较小,锚杆的间距越大坑底回弹隆起量越小;锚杆参数对地连墙的影响较大,锚固段和自由段长度变大,地连墙的变形减小;当倾角增大时,地连墙的变形先减小后增大;锚杆的间距增大,地连墙的变形增大。In order to study the impacts of the bolt length, inclination and spacing on the pit bottom rebound and ground wall deformation, and considering the joint role of soil, retaining structure and anchor support system, a complex pit model is built by using three-dimensional finite element method. The results show that the pit bottom rebound has a sig- nificant spatial effect and relates to the deformation of the ground wall; the pit bottom rebound is less affected by the bolt inclination, bolting segment length and bolt freedom segment length, and the bolt spacing increases with the decreasing of the pit bottom rebound; the bolt parameters have a greater impact on the ground wall, and the deformation of the ground wall increases with the decreasing of the bolting segment length and bolt freedom segment length; the deformation of the ground wall decreases firstly, then increases with the inclination increasing; the ground wall deformation increases with the bolt spacing increasing.

关 键 词：锚杆参数 ABAQUS 坑底回弹隆起 数值分析 

分 类 号：TU753[建筑科学—建筑技术科学]