Construction method of deep rock drilling occlusive pile of segmented construction

The invention belongs to the technical field of underground foundation pit engineering envelop enclosure construction, and particularly relates to a construction method of a deep rock drilling occlusive pile of segmented construction. The method comprises the following steps that (1) an intense weathering soil and rock layer is drilled to form holes; (2) a rotary drilling rig drills holes, and a punching and grabbing bucket cleans the holes; (3) a weak weathering hard rock layer is drilled to form holes; (4) a reducing reinforcement cage is mounted; (5) the reducing reinforcement cage is usedfor pouring concrete to form a pile; and (6) a sleeve pipe is pulled out. By means of the construction method, the technical difficulty of deep rock drilling occlusive pile construction in a high-strength hard rock stratum can be overcome, the construction footage is quick, the quality of a pile forming place and disturbance to surroundings can be effectively controlled, meanwhile, settling and deviation of surrounding bu