Piling of percussive drilling
7, the drilling process control should be rigorous, but also do not have to worry about failure, a reasonable choice of treatment methods, generally can be solved, the common, foot blade perforation, hole collapse, partial hole, cross hole, drilling, drilling, drilling buried crane, well preventive measures are generally not in advance, very important duty responsibility. 8, the remaining holes, steel cage decentralization, concrete pouring, sealing and other are more conventional, do not write more. But the bottom of the hole, sediment, sediment, etc. must be recycled clean, otherwise it will be buried in the later works of greater risk. When the concrete is poured, the bottom concrete under the impact of residue inclusion in steel or bond caused by defects in the pile in concrete, on the upper structure of the load transfer to the bottom of the pile, the structure will definitely should produce uneven settlement for residue.
