Method for constructing concrete pile through rotary excavating and pressure irrigation

Abstract

The invention relates to a method for constructing a concrete pile through rotary excavating and pressure irrigation, which is characterized by comprising the following steps: employing a rotary excavating driller for construction, lifting a rotary excavating drilling bucket after drilling a pile hole with a preset depth, and placing a multi-functional slag removing barrel at the bottom of the pile hole for slag removal; after slag removal at the bottom of the pile hole is complete, rotating the multi-functional slag removing barrel for half a circle so that a concrete output valve at the bottom of the multi-functional slag removing barrel is open, and lifting a rotary excavating drilling rod slowly while pressure-irrigating concrete in the pile hole by a concrete convey pipe arranged in the rotary excavating drilling rod and performing synchronous self-expansion along with the rotary excavating drilling rod; and lifting a reinforcement cage and inserting the reinforcement cage into the pile through dead weight of the reinforcement cage and a vibrator. By the adoption the invention, drilling and slag removal of the pile foundation, irrigation and pile forming are integrated, overcoming the disadvantage that for rotary excavating and pressure irrigation of a pile in the prior art, a plurality of complicate and hard-to-control measures need to be taken for preventing settlement overproof, effectively controlling the project quality of a pile rotary excavating machine, greatly improving construction speed and benefits, and filling up an empty filed in the pile industry in China.

Description

technical field [0001] The invention relates to a construction method of a rotary excavator, in particular to a construction method of a rotary excavation press grouting concrete pile. Background technique [0002] At present, domestic rotary excavators generally can only drill holes and cannot pour concrete. After the rotary excavator drills a hole, the drill pipe must be lifted out and put into a steel cage, otherwise the concrete cannot be poured. Rotary excavation cast-in-situ piles take many complex and difficult-to-control measures to prevent the sediment from exceeding the standard, and it takes a long time to clean the slag, which increases the project cost. Therefore, the existing rotary drilling machine drill pipe seriously restricts the pile foundation. industry development. [0003] The multi-functional slag cleaning cylinder (CN201220456767.1) invented by the applicant of this patent has a steel pipe with a hollow flow channel for pouring concrete inside the or...

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Problems solved by technology

[0002] At present, domestic rotary excavators can only drill holes, but cannot pour concrete. After the rotary excavator drills holes, the drill pipe must be lifted out and put into the steel cage, otherwise the concrete cannot be poured.

Rotary excavation cast-in-situ piles take many complex and difficult-to-control measures to prevent the sediment from exceeding the standard, and it takes a long time to clean the slag, which increases the project cost. Therefore, the existing rotary drilling machine drill pipe seriously restricts the pile foundation. industry development

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