摘要
在岩溶地区,当天然地基承载力不满足设计要求时,建筑物基础一般多采用人工挖孔扩底灌注桩或嵌岩桩,但这些技术往往施工时间长,而且在某些特殊地质条件下无法施工。结合唐山某工程,在岩石埋深较浅部位采用人工挖孔和嵌岩桩施工难度较大,最终采用上部人工挖孔,桩端载体采用爆破成孔施工的载体桩技术,既提高了施工进度,同时降低了造价。
Manual excavated pile and rock-socketed pile are usually adopted in karst area when the bearing capacity of natural foundation can’t meet the design requirement.However,the method has long construction period and can’t constructed in special geological conditions.In a project in Tangshan,it is difficult to construct manual excavated pile and rock-socketed pile in shallow layer.At last,the method that manual excavated pile used in upper part and drilling by blasting in pile tip is adopted which improved construction speed and reduced the cost.
出处
《施工技术》
CAS
北大核心
2013年第13期15-17,29,共4页
Construction Technology
关键词
地下工程
桩基础
载体桩
岩溶地区
爆破
施工技术
underground
piles
piles with bearing base
karst area
blasting
construction
