Rotary excavating pile construction method in combined construction

Abstract

The invention discloses a rotary excavating pile construction method in combined construction. The method comprises the following steps: flattening a field, laying wires in pile positions, arranging a rotary excavation machine in place, burying a protecting cylinder, re-measuring the pile position, preparing slurry, drilling, crushing the rubble layer by using a hole punching pile machine and a punching grasp hammer in a combined manner when encountering a rubble layer, continuously putting down a full-steel protecting cylinder after grasping small crushed stone pieces from the hole, continuously drilling the hole by using the rotary excavation machine after hitting the full-steel protecting cylinder in place, repeatedly using the rotary excavation machine to drill in, stamping and smashing by using the hole punching pile machine, and grasping by using a grab machine till a designed depth is achieved. The method comprehensively adopts the rotary excavation pile machine for forming the hole, the full-steel protecting cylinder, the punching pile machine and the grab machine for combined working, a comprehensive support pile construction process that crushed stone pieces are grasped off is accomplished, the rubble layer can be effectively processed, the mechanical automation efficiency is high, the hole forming speed is fast, a small amount of slurry is needed, the environment is slightly polluted, and various requirements of construction can be sufficiently met.

Description

【Technical field】 [0001] The invention relates to the field of foundation and building construction, in particular to a combined construction method for special geological conditions. 【Background technique】 [0002] The rotary excavator is a piling machine with a high degree of mechanization and intelligence. The rotary excavator is widely used in foundation construction such as roads, bridges, docks, and high-rise buildings. , rock barrel drill, hydraulic hammer, etc. The advantage of rotary pile machine construction is that the construction speed is fast. Because the rotary pile machine construction relies on the rotary drill bit with a valve at the bottom to break the rock and soil, and directly put it into the drill bucket to lift it to the ground, there is no need to remove the rock and soil. The crushing is transported out of the hole by mud, and the average footage per minute can reach about 50cm. The construction precision is relatively high. During the construction...

AI Technical Summary

Problems solved by technology

However, the construction site on site is small, and it is difficult to store so much mud in the site. If the mud is transported abroad, it is impossible to clean it out of the site in time due to traffic and environmental restrictions.

If punching piles are used, the sand layer on the site is very thick, which will cause serious hole collapse, and it is impossible to guarantee the operation surface required for future basement construction.