[1]俞缙,王艳芳,宋博学.复合土钉支护的软土基坑开挖有限元模拟分析[J].华侨大学学报(自然科学版),2011,32(2):212-217.[doi:10.11830/ISSN.1000-5013.2011.02.0212]
　YU Jin,WANG Yan-fang,SONG Bo-xue.FEM Simulation of Composite Soil Nailing Supported Excavation in Soft Clay Pit[J].Journal of Huaqiao University(Natural Science),2011,32(2):212-217.[doi:10.11830/ISSN.1000-5013.2011.02.0212]
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复合土钉支护的软土基坑开挖有限元模拟分析()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第32卷
期数:
2011年第2期
页码:
212-217
栏目:
出版日期:
2011-03-20

文章信息/Info

Title:
FEM Simulation of Composite Soil Nailing Supported Excavation in Soft Clay Pit
文章编号:
1000-5013(2011)02-0212-06
作者:
俞缙; 王艳芳; 宋博学
华侨大学岩土工程研究所; 江苏省交通科学研究院
Author(s):
YU Jin1;  WANG Yan-fang2;  SONG Bo-xue1
1.Institute of Geotechnical Engineering, Huaqiao University, Quanzhou 362021, China; 2.Jiangsu Transportation Research Institute, Nanjing 210017, China
关键词:
软土基坑;  复合土钉支护;  开挖模式;  有限元模拟
Keywords:
soft clay pit;  composite soil nailing support;  excavation mode;  finite element method
分类号:
TU753
DOI:
10.11830/ISSN.1000-5013.2011.02.0212
文献标志码:
A
摘要:
基于平面应变假设,采用自行编制的有限元程序建立数值计算模型,考察某复合土钉支护工程下的软土基坑开挖变形性状及土钉的受力情况.结果表明,深搅桩-土钉/锚杆支护软土基坑中,锚杆张拉力的作用对基坑水平位移及受力影响较大; 复合土钉支护结构并无特别针对坑底土体隆起的加固措施,须采用考虑时空效应的分层分块的开挖模式,以确保坑底隆起量在安全控制范围内.依次模拟基坑开挖前的深搅桩支护、4层土体开挖及4层土钉支护的施工全过程,模拟结果与已有的同类工程经验和结果在定性方面具有一致性.
Abstract:
Based on plane strain hypothesis,the pit deformation and soil nailing stress during the excavation are analyzed for the composite soil nailing supported pit in soft clay by finite element program designed by ourselves.The results show: the suspender force of anchor rod influences obviously the horizontal displacement and stress in soft clay pit with deep-mixing pile,soil nailing and anchor rod.Because there is no reinforcement measure on pit bottom to prevent soil uplift in composite soil nailing supported structure,the stratified and partitioned excavation mode considering time-space effect is suggested to control the bottom soil uplift within the safe range.The pre-set deep-mixing pile,four soil nailing layers and excavations of the four soil layers are simulated step by step,the simulation is in qualitative agreement with the in-situ observation experience.

参考文献/References:

[1] 中国工程建设标准化协会. CECS 96:97.基坑土钉支护技术规程 [S]. 北京:中国计划出版社, 1997.
[2] 张旭芝, 潘宏春. 深层搅拌水泥土墙与土钉墙在基坑围护中的组合应用 [J]. 建筑技术, 2003(2):99-102.doi:10.3969/j.issn.1000-4726.2003.02.016.
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[6] 郑坚, 龚晓南. 土钉支护工作性能的现场监测 [J]. 建筑技术, 2004(5):337-339.doi:10.3969/j.issn.1000-4726.2004.05.004.
[7] 黄伟达, 熊传祥, 陈福全. 软土基坑复合土钉支护性状分析 [J]. 岩石力学与工程学报, 2005, (z2):5835-5839.
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备注/Memo

备注/Memo:
福建省自然科学基金资助项目(2009J05125); 华侨大学高层次引进人才科研启动项目(08BS414); 福建省泉州市科技计划项目(2010Z81)
更新日期/Last Update: 2014-03-23