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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第13卷    第9期    总第78期    2016年9月

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文章编号:1672-7029(2016)09-1737-06
软弱地基下深基坑工程的围护结构效应研究
李志成1,王飞龙1,张雪松2,黄林冲3

(1.长沙中大建设监理有限公司,湖南 长沙 410075;
2.广州番禺职业技术学院,广东 广州 511483;
3.中山大学 工学院,广东 广州 510275
)

摘 要: 软弱土地基下的深基坑工程具有较强的不确定性和综合性,其支护结构和围护结构的效应经常由各种因素综合影响而难以准确计算及测量。围绕软土深基坑工程的围护结构效应问题,根据在不同理论分析方法下对基坑开挖各个施工工况下围护结构的变形和弯矩进行分析,并引用正在开挖的一起软土深基坑工程案例,介绍基坑开挖过程中变形和弯矩的大小以及分布状态,通过与该工程的实际监测数据进行对比,得出基坑开挖不同工况下围护结构效应的相关特点,并强调对于软弱土地基的基坑工程需通过多种计算分析手段进行多重复核的观点,并以此结果来指导、预测以及评价基坑工程的变形和内力情况以及安全性等。

 

关键字: 软土地基;深基坑;数值模拟;围护结构

Effects of retaining structure at deep excavation engineering of soft ground
LI Zhicheng1,WANG Feilong1,ZHANG Xuesong2,HUANG Linchong3

1.Changsha Central South University Construction Supervision Co., Ltd, Changsha 410075, China;
2.Guangzhou Panyu Polytechnic, Guangzhou 511483, China;
3. School of Engineering, Sun Yat-sen University, Guangzhou 510275, China

Abstract:The effects of the supporting and retaining structure of deep foundation pit engineering in soft soil foundation is difficult to be calculated and measured accurately,with its uncertainty and complexity. According to the analysis under different theoretical methods for various excavation procedures, this paper proposed the deformation and bending moment effects of the supporting structure, through a big soft ground deep excavation project, which is under construction. Together there was a comparison study with the site monitoring data. The structure characteristics in different excavation conditions were studied. The paper emphasized that the calculation of the deep foundation pit in soft ground needs to be analyzed through comprehensive methods and calculated, with different professional software programs. The results of this paper can be used as a guide, to forecast the deformation and internal forces, as well as the evaluation of safety and excavation projects.

 

Key words: soft foundation; deep foundation pit; numerical simulation; retaining structure

ISSN 1672-7029
CN 43-1423/U

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