Drilling technology for rock-socketed piles

Abstract

The invention discloses a drilling hole-forming process of a rock-socketed pile. The drilling hole-forming process includes the following steps that under the guiding action of a steel sleeve and first guiders, a portion, with the steel sleeve, of the rock-socketed pile is drilled to form a hole through a first drill bit; under the combined guiding action of a second guider and the first guiders, the rock-socketed section without the steel sleeve is drilled to form a guiding hole through a second drill bit; and after drilling of the guiding hole is finished, the second guider is dismantled, the second drill bit is replaced with a third drill bit, a third guider is mounted at the front end of the third drill bit, under the combined guiding action of the third guider and the first guiders, drilling of a final formed hole is performed, and the third guider is always located in the guiding hole in the drilling process. By means of the drilling hole-forming process of the rock-socketed pile, the effect that the slopes of the drill bits are kept consistent with the slope of the steel sleeve during construction of an oblique rock-socketed pile can be well guaranteed, the hole-forming quality is improved, the hole walls are smooth, intact and high in straightness, the construction requirements are met, and the construction efficiency is improved. The drilling hole-forming process of the rock-socketed pile is easy to implement, low in construction cost and good in economic benefits.

Description

technical field [0001] The invention relates to the technical field of construction of pipe piles at port terminals, in particular to a drilling and hole-forming process for rock-socketed piles. Background technique [0002] In the wharf engineering structure, in order to meet the requirements of bearing capacity, rock-socketed pile technology is often used. Rock-socketed pile is one of the more commonly used pile foundation projects, mainly straight piles, and some inclined piles. Drilling technology is the most important part of the construction of inclined rock-socketed piles. Due to the percussion drilling construction of ultra-long inclined rock-socketed piles, problems such as deviation and hammer jamming are prone to occur. It is better to use the rotary drilling rig in the drilling process. However, during the construction process of the rotary drilling rig, the self-weight of the drilling tool will cause the drilling tool to sag and bend, and the directionality of ...

AI Technical Summary

Problems solved by technology

However, during the construction process of the rotary drilling rig, the self-weight of the drilling tool will cause the drilling tool to sag and bend, and the directionality of the drill bit and the axis of the drill bit will have a large deviation, so that the slope of the drill bit and the slope of the steel casing cannot be kept consistent, affecting the quality of the hole. , especially when the rock-socketed pile depth is greater than 10m, and some rock-socketed piles have a large inclination, it is easy to have the problem that the hole is not straight, and the construction is difficult. The existing drilling technology cannot meet the construction requirements. requirements

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