冻土地区桥梁钻孔灌注桩施工关键技术探讨

以青藏铁路布哈河特大桥工程为例,针对桥涵基础产生冻融变形病害的问题,介绍了钻孔灌注桩冻胀原理及防冻胀设计,对钻孔灌注桩施工的关键技术进行了探讨,总结得出了多年冻土区的桥梁钻孔桩施工注意事项。

On exploration for key technique for bridge bored pile construction in frozen soil areas

Taking Buha super-large Bridge along Qinghai-Tibet railway as an example,aiming at the frozen deformation disease of bridge foundation,introduces the frost heave principle and anti-frost design of the bored pile,explores the key technique for the bored pile,and sums up the construction precautions in many-year bridge bored pile.