Drilling machine based on crossed dense-tooth drill bits and construction method of cast-in-place pile thereof

Abstract

The invention discloses a drilling machine based on crossed dense-tooth drill bits and a construction method of a cast-in-place pile thereof. The drilling machine comprises a drilling machine support,a spiral drilling machine is fixedly installed at the top of the drilling machine support, a plurality of fixators are arranged on the front face of the spiral drilling machine, the inner walls of the fixators are movably connected with and sleeve a plurality of sets of spiral drill rods which are fixedly connected together through connectors, and the bottom ends of the spiral drill rods are fixedly provided with the crossed dense-tooth drill bits. According to the drilling machine based on the crossed dense-tooth drill bits and the construction method of the cast-in-place pile of the drilling machine, by arranging the crossed dense-tooth drill bits and a pouring construction method of the crossed dense-tooth drill bits, the breakthrough capacity of the spiral drill rods to a hard rock stratum is effectively improved, so that the problems that a long spiral drilling machine and a positive circulation drilling machine are low in cast-in-place pile hole forming speed and much in sediment during construction on an old cement soil pile foundation or a hard rock stratum are solved, and then the working efficiency of the drilling machine is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of building construction equipment, and in particular relates to a drilling rig based on a crossed fine-tooth drill bit and a construction method for a cast-in-situ pile. Background technique [0002] In the traditional pile foundation construction process, the drilling rig is used to drill the corresponding pile holes on the foundation, and then the reinforced concrete is poured into it to make the required foundation piles. Drilling is an indispensable construction process, and the long auger drilling rig or positive circulation drilling rig hole forming technology usually used in the construction process of the pile hole at present. [0003] Among them, the long auger drilled cast-in-situ pile has been widely used in various pile foundation constructions due to its fast pile formation speed and high construction efficiency. Hole formation, when encountering soft soil and drilling, the inner wall of the p...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a drilling rig based on a cross-pitch drill bit and a construction method for a cast-in-place pile, which has the advantages of less disturbance around the foundation pit, strong adaptability to the terrain, and no collapse of the inner wall of the pile hole when the drill is lifted Or the advantages of deformation, stability and high work efficiency solve the problem that when the long auger drilled cast-in-situ pile encounters weak soil and lifts the drill, the inner wall of the pile hole has a small restraint stress and is prone to collapse and deformation of the hole wall. When encountering old cement soil When drilling pile foundations and hard rock formations, the drilling is difficult, the vibration is large, and the frictional stress is large, which has a great impact on the deformation of the deep foundation pit slope. However, the construction efficiency of the positive circulation drilling technology is low, and the construction site requires multiple Circular drilling rigs can meet the construction schedule requirements. For example, when drilling into old cement-soil foundations or hard rock formations, drilling is difficult and the disturbance is large, and the work efficiency is relatively low.

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