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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第9卷    第6期    总第50期    2012年12月

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文章编号:1672-7029(2012) 06-0030-06
土石组合超深基坑开挖下桩锚支护对邻近建筑物影响分析
王洪涛1,2,傅鹤林1,刘运思1,马婷1

(1.中南大学土木工程学院,湖南长沙410075; 2.中石油湖南省销售分公司,湖南长沙410007)

摘 要: 基坑开挖一般对邻近建筑物影响很大,基坑内和周围土体的垂直和水平位移过大,会导致建筑物结构破坏,甚至功能失效。采用限元法,对土石组合超深基基坑开挖下邻近建筑物的性状进行分析,研究在不同开挖深度、不同刚度、不同桩间间距下工况下,桩体变形和地表沉降,并与未考虑临近建筑物影响的变位进行对比分析。在将现场监测结果与模拟值进行对比分析的基础上,获得了有益的成果,且对基坑施工具有较好的参考价值。

 

关键字: 基坑开挖;桩;有限元分析;临近建筑物;位移;监测

Analysis of the pile anchor bracing affect adjacent building under super deep excavation with earth-rock combination
WANG Hong-tao1,2,FU He-lin1,LIU Yun-si1,MA Ting1

1.Central South University,School of Civil Engineering,Changsha 410075,China;
2.China Petroleum and Sales Branch in Hunan Province,Changsha 410007,China

Abstract:There is much effect on neighboring buildings by excavation.If the vertical and horizontal displacement of soil under the foundation of pit excaration as well as around sorrounding soils are oversize, it can result in structural failure,even function loss.Finite element method was used to analysis building traits under the foundation of ultra-deep foundation pit.The pile deformation and subside in the different excavation depths, stiffnesses and different of pile spacing were researched.And it has contrasted the pile deformation and subside without near building’s impact.Through comparative monitoring and simulation,the conclusion has certain directive significance for this project.And it has preferable reference value to similar projects.

 

Key words: braced excavation; pile foundation; finite element method analysis; near buildings; displacement; Monitoring

ISSN 1672-7029
CN 43-1423/U

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