An improved rotary drilling drill and its construction method
A construction method and technology of rotary drilling, applied in the direction of drilling equipment and methods, earthwork drilling, drilling equipment, etc., can solve problems such as inconvenient handling, increased construction difficulty, and impact on construction progress, so as to avoid pile foundation quality Accidents, increased efficiency of lowering, and the effect of preventing hole collapse
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[0027] Such as Figure 1-5 As shown, an improved rotary drilling drill includes a steel casing 1, a grooved rail 4, a sleeve rod 7 and a sleeve body 9, the side wall of the steel casing 1 is provided with a snap ring 2 and a clamping post 3, and the grooved rail 4 is a horseshoe-shaped structure, the middle part of which is a cavity, the front end of the sleeve rod 7 is provided with a ferrule 5, and the rear end of the ferrule 5 is provided with a ferrule rod 6, and the sleeve rod 7 cooperates with the ferrule rod 6. The front end of the sleeve body 9 is provided with an extension end, the extension end is a two-wing structure, the sleeve rod 7 is movably connected with the extension end, and the sleeve body 9 is provided with a fixing bolt column 8 .
[0028] This embodiment also includes a construction method for an improved rotary drill, comprising the following steps:
[0029] A1. The position of the pile foundation is staked out during construction, and the rotary drill...
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