桥梁桩基人工挖孔

On artificial hole-digging in bridge pile foundation

结合工程实践，介绍了桥梁桩基人工挖孔的适用范围及防护措施，从挖掘方法、挖掘程序、工艺要求、孔内爆破施工、安全技术措施等方面阐述了人工挖孔的工艺，同时指出了挖孔作业中的注意事项以及人工挖孔成孔的优点。

Combined with practical engineering, the author introduces application sphere and protective measure of artificial hole-digging in bridge pile foundation, illustrates its technology from digging method, digging process, technical requirement, internal-hole blasting construction and safety technical measures, and points out attentions should be noticed in digging hold work and the advantages of artificial digging＂ pore-forming.