Construction machinery for cast-in-place piles mainly includes

Rotary drill, impact drill, rotary drill.

1. Rotary drilling rig: This is a new type of piling machine. By rotating and pressurizing the drill pipe, drilling cuttings such as soil or gravel are cut or broken into holes, and then the drill pipe is lifted to take the soil cuttings out of the holes. This machine is mainly used for the construction of soft soil, clay, silt and other soft strata, and has the advantages of fast pore-forming speed, high precision and little disturbance to the soil layer.

2. Impact drilling rig: This is a machine that uses impact and rotation to drill holes. The impact force is to break the rock into pieces by the falling of a heavy hammer on the drill bit, and then discharge the pieces out of the hole by rotating and squeezing. This machine is mainly used in the construction of hard rock stratum, and has the advantages of fast hole-forming speed and good hole wall stability.

3. Rotary drilling rig: This is a machine for drilling holes by cutting and crushing rock layers with a rotary drill. The rock formation is broken into pieces by rotating the drill bit, and then the pieces are taken out of the hole by rotating. This machine is suitable for the construction of various rock strata, and has the advantages of fast pore-forming speed and little disturbance to soil layers.