Rotary drilling rig construction case | Full set of pipe construction for pebble layer

Construction Equipment:SR405W+15m machine lock lever; The drill bucket is a 1.0m cone-bottom composite sand bucket;

Pile foundation parameters:The pile diameter is 1.0m, and the pile length is 22~25m;

Parameters of the casing:The outer diameter is 1200mm, the wall thickness is 40mm, and the length of the casing is mainly 4m;

Stratigraphy:0-5m construction waste, mainly bricks, cement stones, particle size of 2-100mm, some visible cement stones above 300mm;

5~10m is mainly backfilled with pebble soil, and the local boulder is about 400mm;

10~18m is a pebble layer, with a large gradation difference, and there are more boulders above 400mm locally.

Construction Method:After the full casing follows up the opening 2m, drill 1-2m first, then lower the casing, and repeat the cycle;

Construction Efficiency:It takes about 6 hours to form a hole.