Engineering Drilling Rig for Hard Strata Qj250-1Main features:
The major diameter filing pile drilling machine of QJ250-1 type applies to major diameter bridge pier hole in various geologic conditions, such as ravelly ground, clay loam layer, sandy gravel, breaking layer and lithosphere as well as other various major diameter pore forming construction.
This drill's torque is large, the rigidity is good, and the whole machine is stable and drilling efficiency high and quality of pore forming is excellent. It adopts a set of drilling tool which can be used for two species of drilling technique of positive and negative circulation, it is equipped with air compressor, and can realize gas life reverse circulation drilling
The pile holder of ZJG260, which matches with main machine, is equipped with five wheels tackle with two load of 600KN to move left and right on pile holder, in order to reduce the assistant time during construction; The lower plate isd equipped with steel wheel device, which can move vertically and horizontally on guide rail; The upper plate can move vertically and keeps off the opening, the aiguille under 2.5meters can enter the hole directly and is very convenient.
The drilling machine of QJ250-1 type has won Scientific and Technical Advance the First Prize of Construction Ministry.
|QJ250-1Type major diameter filling pile drilling machine||Zjg60type piule holder|
|Drilling diameter(m)(rock stratum)||2.5||Drilling tower load(KN)||600|
|Dynamic force (mm)||95||Effictive height(m)||9|
|Drilling depth (m)||100||Single rope load of capstan engine(KN)||54|
|Rotary speed (r/min)||7.8 12.7 26|| || |