Improved rotary drilling rig and construction method

Abstract

The invention discloses an improved rotary drilling rig. The improved rotary drilling rig comprises a steel casing, a groove rail, a loop bar and a sleeve body, and a clamping ring and a clamping column are arranged on the side wall of the steel casing; the groove rail is of a horseshoe-shaped structure, the middle of the groove rail is a cavity, a ferrule is arranged at the front end of the loopbar, a ferrule rod is arranged at the rear end of the ferrule, and the loop bar is matched with the ferrule rod; the front end of the sleeve body is provided with an extending end, the extending end is of a two-wing structure, and the loop bar is movably connected with the extending end, and the sleeve body is provided with a fixed bolt column; and under a dado of the steel casing, the rotary drilling rig can effectively prevent the situation of hole collapse, at the same time, because the steel casing adopts a sliding rail, the putting-downward efficiency of the steel casing is improved, andby adopting the construction method, pile foundation quality accidents are effectively avoided, and effective guarantee is provided for the construction progress.

Description

technical field [0001] The invention belongs to the field of rotary drilling, and in particular relates to an improved rotary drilling and a construction method. Background technique [0002] In recent years, bridge construction technology has become more and more perfect, especially for pile foundation construction. The previous machinery and technology can no longer meet the needs of pile foundation construction. Traditional positive and reverse circulation drilling rigs and percussion drilling rigs have been gradually eliminated. [0003] Rotary drilling rigs have been developed internationally for decades, and have been gradually recognized and widely used in China in recent years, becoming a new type of pile hole construction method with the fastest development in recent years. Rotary drilling bored pile technology Known as "green construction technology", it is characterized by high work efficiency, good construction quality, and less dust and mud pollution. Rotary dr...

AI Technical Summary

Problems solved by technology

However, in the specific construction of rotary drilling, due to the uncertain geological conditions, the design depth is different due to the comprehensive influence of various geological conditions. During the drilling process, it is easy to cause hole collapse or deviation. When these When the situation occurs, the difficulty of the overall construction will be increased, the construction progress will be affected, and it is extremely inconvenient to deal with. How to ensure the construction progress of the rotary drilling and the quality of the pile foundation under the conditions allowed by the existing construction conditions and construction equipment is a must. Worthy Research for Technicians

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