Working method of a construction pile foundation sinking tube bottom expansion soil extraction device

Abstract

The invention relates to the field of construction equipment, in particular to a base-expanding soil-taking apparatus for building pile foundation sunk pipe. The apparatus comprises a base expanding device, a rotating device, a positioning device and a control device, wherein the base expanding device comprises a scraping mechanism and a driving mechanism, the rotating device includes a cylindrical barrel and a rotating mechanism, the positioning device includes a positioning mechanism and an outward expansion mechanism for driving the positioning mechanism to expand outwards, the control device includes a controller and a sensor assembly electrically connected with the controller. The apparatus can realize integration of base expanding and soil taking, simplify construction steps, reduceworking time, change the soil taking manner, avoid large vacuum soil suction power consumption, improve soil taking efficiency, and reduce working cost. The positioning mechanism can realize positioning of the base-expanding soil-taking apparatus at any position in a cavity, so that the apparatus can perform reaming at any position to meet the reaming diversity and improve the utilization rate.

Description

technical field [0001] The invention relates to the field of construction equipment, in particular to a working method of a construction pile foundation sinking tube bottom expansion soil extraction device. Background technique [0002] Immersed tube rammed and expanded cast-in-situ piles, referred to as rammed and expanded piles. It uses a pile hammer to simultaneously sink the inner and outer pile tubes into the soil layer, and rams and expands the concrete at the end of the inner pile tube by hammering to form an enlarged head at the end of the pile, and then pours the concrete on the pile body. When pulling out the outer pile tube, use the inner pile The pipe and the pile hammer are pressed against the concrete surface inside the pipe, so that the pile body is densely packed. [0003] All buildings are supported by solid and stable foundation engineering. In order to improve the bearing capacity of single piles, the foundation engineering of prefabricated steel concrete...

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Problems solved by technology

[0005] The problems in the above scheme are that bottom expansion and soil extraction are carried out in different steps, which increases the construction steps and prolongs the working time, and the bottom expansion cannot be realized simply from the above scheme. The above scheme uses a vacuum device to suck out the soil, and its soil absorption efficiency Lower, deeper cavity, higher power required, increased operating cost

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