查钦曲大桥钻孔灌注桩施工工艺  

The Process of Bored and Pouring Pile Under Chaqingqu Bridge

作　　者：周旭荣[1] 韩亮[1] 王敦诚[1] 

机构地区：[1]中国地质大学(北京)工程技术学院,北京100083

出　　处：《东华理工学院学报》2005年第1期17-21,共5页Journal of East China Institute of Technology

基　　金：国家重点工程项目青藏铁路(2002 K00 1)资助。

摘　　要：在高原多年冻土地区,气候恶劣,生态环境脆弱。钻孔灌注桩施工中又不可避免地会遇到处于不同冻结状态的土层,施工中必须考虑并设法预防和消除由于冻土的变形、强度弱化及冻胀、融沉所引起的各种危害,因此,钻孔灌注桩施工在质量、安全和环保等方面难度很大。介绍了查钦曲大桥钻孔灌注桩施工工艺,该工艺明显不同于内地通常的钻孔灌注桩施工工艺,在高原多年冻土地区行之有效,对高原多年冻土区钻孔灌注桥施工具有重要的参考意义。In upland plain area,Trozen soil has came into being for many years.Ecological condition is fragility in so bad climate.The instance of different frozen soil layers is encountered inevitably in bored and pouring pile construction,The prevention and elimination of hazard which is caused by the distortion,intensity fall,frost heave and thaw collapsibility of the frozen soil must be considered during the construction.So the construction of bored and pouring pile have some difficulty in protecting environment and assuring quality and safty.In this paper,the process of bored and pouring pile under Chaqingqu bridge is introduced,This is different from the construction of bored and pouring pile in plain area,It is proved effectively in upland plain area and has important reference value in altiplano perennially frozen soil region.

关 键 词：施工工艺 大桥 钻孔灌注桩施工 多年冻土地区 高原多年冻土区 环境脆弱 会遇 融沉 

分 类 号：U445.551[建筑科学—桥梁与隧道工程] TU753.3[交通运输工程—道路与铁道工程]