Percussion drill for cast-in-situ bored pile construction

Abstract

The invention discloses a percussion drill for cast-in-situ bored pile construction. The percussion drill for cast-in-situ bored pile construction comprises a base; a supporting rod, a reinforcing rib, a winch and a first pulley are fixedly connected to the top of the base, the top end of the reinforcing rib is fixedly connected with the side wall of the supporting rod, a second pulley is arrangedat the top end of the supporting rod, and a steel cable is wound on the winch. According to the percussion drill, by arranging a L-shaped block, a rolling shaft, an inner pipe, a movable groove, a steel ball, a limiting strip, an outer pipe and the like, an auxiliary supporting mechanism composed of the rolling shaft and the L-shaped block can effectively limit the steel cable released by the second pulley, shaking of the steel cable is avoided, and meanwhile the normal movement of the steel cable is not influenced while the maintaining mechanism can effectively support the steel cable, and the steel cable is always vertical to the ground when encountering strong wind or underground obstacles, so that the punching quality is ensured, and the construction effect and the construction efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of percussion drilling rigs, in particular to a percussion drilling rig used for the construction of bored piles. Background technique [0002] The impact drilling rig is a kind of machine that uses the impact force of the drill bit to punch and drill holes in the rock formation. It is a commonly used engineering equipment in the construction of cast-in-situ piles. The impact force of the free fall cuts the rock formation and expels debris to form holes. There are two types of percussion drilling rigs: drill pipe type and wire rope type. The former has smaller bore diameter, lower efficiency and fewer applications. The latter has a large bore diameter, and the size of the drill bit can be modified according to the designed pile diameter. When the wire rope percussion drill is punching, it mainly fixes the drill bit at one end of the wire rope, and uses the pulley block to pull the wire rope and the gravit...

AI Technical Summary

Problems solved by technology

[0003] When the wire rope percussion drilling machine encounters strong wind or underground obstacles when punching holes, it is difficult for the wire rope to maintain a vertical state with the ground, which makes the punching hole skewed, affecting the construction effect and construction progress.

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