广州地铁西村站近接高架桥桩基影响分区及应用研究.doc

文档介绍：广州地铁西村站近接高架桥桩基影响分区及应用研究
王明年1,崔光耀1,喻波2
(1. 西南交通大学土木工程学院,四川成都 610031;2. 中国中铁二院工程集团有限责任公司,四川成都 610031)
摘要:广州地铁西村站为暗挖法施工的隧道群,近接9组高架桥桩基, m。为保证高架桥的使用安全性,采用有限差分法和最小二乘法原理,对近接高架桥桩基进行近接影响分区研究,并根据分区结果对桩基进行分类,确定各类桩基沉降集中区,并对其提出可靠的加固方案;同时建立西村站近接桩基监控量测管理等级。研究结果表明:西村站隧道洞室开挖对近接高架桥桩基的影响可分为4个区,相应地把近接桩基分为4类;(D为隧道洞径),,;西村站范围内的9组桩基均为A类桩基,其中危险桩基为XJ25,XJ32,XJ34。通过现场应用,有效地控制了西村站隧道群开挖对近接高架桥桩基的影响,保证了施工安全,积累了成功经验,可为相似工程施工提供参考。
关键词:隧道工程;桩基影响分区;桩基沉降集中区;监控量测管理等级
中图分类号:U 45;TU 47 文献标识码:A 文章编号:1000–6915(2009)07–0000–09
RESEARCH ON INFLUENTIAL PARTITION AND APPLICATION OF ADJACENT VIADUCT PILE FOUNDATIONS IN XICUN STATION OF Guangzhou Metro
WANG Mingnian1,CUI Guangyao1,YU Bo2
(1. School of Civil Engineering,Southwest Jiaotong University,Chengdu,Sichuan 610031,China;2. China Railway Engineering Group Co.,Ltd.,Chengdu,Sichuan 610031,China)
Abstract:Nine groups of viaduct pile foundations are located in the vicinity of Xicun station of Guangzhou metro which is constructed by subsurface excavation method. The minimum clear distance is m between the tunnel of Xicun station and pile foundation XJ33. To ensure the use safety of the viaduct,the least squares principle and finite difference method are used to study the influential partition of the pile foundations. The e of the influential partition is use