高海拔高寒地区旋挖钻孔桩施工技术

Construction technology on rotary drilling bored piles in high altitude and alpine region

旋挖钻施工的特点是工作效率高、施工质量好、泥浆污染少。本文结合西察公路天峻1号中桥、2号中桥、关角沟10号中桥孔桩工程实例,阐述高海拔高寒地区砂砾地质环境下的旋挖钻施工要点和注意事项,并通过反复研究与论证,对施工方案进行优化,有效地解决了高海拔高寒地区旋挖钻施工的技术难题,以期可为同类工程施工提供参考与借鉴。

The characteristics of rotary drilling construction are high work efficiency,good construction quality,and less mud pollution.Combined with pile projects of Tianjun No.1 Middle Bridge,No.2 Middle Bridge and No.10 Guanjiaogou Middle Bridge on Xicha Highway,the key points and precautions of rotary drilling construction in sandy gravel geological environment in high altitude and alpine region are explained.Based on repeated research and demonstration,the construction scheme is optimized,which effectively solves the technical problems of rotary drilling construction in high altitude and alpine region,hoping to provide references for the construction of similar projects.