Pump suction reverse circulation pile foundation construction device and method

Abstract

The invention discloses a pump suction reverse circulation pile foundation construction device and method and belongs to the technical field of pile foundation construction. The pump suction reverse circulation pile foundation construction device comprises a rotary drilling rig, a reverse circulation gravel pump, a slag suction hose, a mud purification device, a settling pond and a circulating pool which are communicated in sequence; the rotary drilling rig comprises a drill bit, a drill pipe, a transmission rod, a rotating disk and a hydraulic motor, the drill bit is connected with a bottom flange of the drill pipe, the top end of the drill pipe is connected with a bottom flange of the transmission rod, the top end of the transmission rod penetrates through the rotating disk and is fixed, the top end of the transmission rod is connected with one side of the reverse circulation gravel pump through a swiveling union, the joint of the reverse circulation gravel pump and the slag suction hose is provided with a faucet, and the slag suction hose is fixedly connected with the faucet and the mud purification device. The construction method includes the first step of forming reverse circulation, the second step of starting drilling after reverse circulation is formed until a pile hole is formed and the third step of conducting hole cleaning construction after the pile hole is formed. The device reduces the power of the gravel pump and improves hole forming efficiency.

Description

technical field [0001] The invention belongs to the technical field of pile foundation construction, and in particular relates to a pump suction reverse circulation pile foundation construction device and method. Background technique [0002] Bored cast-in-situ piles are generally formed by mechanical drilling to form pile holes in the foundation, and then placing steel cages in the pile holes and pouring concrete. However, bored cast-in-situ pile foundations are prone to hole collapse and necking during the construction of silt layer, and high sand content will also affect the quality of piles. In the traditional technology, the hole-forming method of rotary drilling and positive circulation is used for hole-forming construction. Such as figure 1 Shown is the construction principle diagram of the positive circulation drilled cast-in-place pile in the traditional process. In the figure, ①-sand pump, ②-faucet, ③-hollow drill pipe, ④-drilling rig rotary device, ⑤-sedimentati...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a pump suction reverse circulation pile foundation construction device and method with high hole-forming efficiency, good pile-forming quality, energy saving and power saving, so as to solve the high power requirements of the pump due to the independent setting of the gravel pump in the traditional process , the entire pumping loop needs to be sealed, the hole forming efficiency is not high and the power consumption is large

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