Rock breaking chambering drilling head used for pile sinking and construction method of pile sinking

Abstract

The invention discloses a rock breaking chambering drilling head used for pile sinking. The rock breaking chambering drilling head includes a drilling body, multiple cutting blades and an articulatedmechanism. The drilling body is of a hollow structure, and the bottom of the drilling body is provided with cutting teeth. The multiple cutting blades are arranged on the drilling body in a surrounding mode, and each cutting blade can do reciprocating motion horizontally. The articulated mechanism includes a main supporting rod and multiple branch rods. The multiple branch rods are arranged corresponding to the multiple cutting blades one by one. One end of each branch rod is connected with the corresponding cutting blade, and the other end of each branch rod is connected with an articulated joint. The articulated joint is connected with the main supporting rod. The main supporting rod extends towards the exterior of the drilling body. The drilling body can slide up and down along the mainsupporting rod. The main supporting rod is provided with a positioning piece, and the positioning piece is located outside the drilling body. By controlling the up-and-down motion of the main supporting rod, the cutting blades are driven to move horizontally. According to the rock breaking chambering drilling head, the diameter of the drilling head can extend and retract automatically; drilling head chambering and recycling can be achieved conveniently; and rock breaking forming hole diameter is expanded, a tubular pile is made to be capable of sinking or entering-rock smoothly.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a rock-breaking and reaming drill bit for pile sinking by static pressure method and a construction method for pile sinking. Background technique [0002] After years of rapid development, prestressed concrete pipe piles have been widely promoted and widely used in construction, roads, bridges, ports and other engineering fields. For a long period of time in the future, with the continuous improvement of my country's infrastructure construction, the pipe pile industry will continue to develop. At present, there are three main pile sinking technologies for concrete pipe piles: static pressure method, hammering method, and vibration method. [0003] Static pressure construction is a pile-forming process that uses the self-weight of the pile-pressing mechanism of the static pile-pressing machine and the counterweight on the pile frame as the reaction force to press the prefabri...

AI Technical Summary

Problems solved by technology

[0009] The object of the present invention is to provide a rock-breaking and reaming drill bit for pile sinking, so as to overcome the problems that the pipe piles are difficult to penetrate into the rock formation during the static pressure pile sinking process, and the pipe piles are not suitable for construction in places with many underground obstacles or boulders. shortcoming

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