Meanwhile handexcavation and weak explosion have been taken according to different ground condition . So it has finally passed this section smoothly .
同时针对不同部位地层采取人工开挖和弱爆破施工，顺利地通过了该地段。
2
Dewatering is always necessary in foundation pit excavation and hand dig piles.
基坑开挖或施行人工挖孔桩常常需要进行人工降水。
3
The sequence of excavation for the shaft of diversion system at Pushihe storage power station is to excavate the pioneer well used by back well boring machine, then by hand air drill to expand it.