Dry-method rotary extruding and expanding pile forming device and construction method
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A construction method and piling technology, which are applied in supporting devices, drilling equipment and methods, sheet pile walls, etc., can solve the problems of non-conformity, waste of construction cost, low platform efficiency, etc. force, the effect of reducing the filling coefficient
Pending Publication Date: 2021-07-27
SHANGHAI CHENGDI CONSTR +3
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However, the construction technology of mud retaining wall piles is very low in single-machine construction efficiency, and a large amount of construction mud needs to be processed, which is not in line with the current green concept; for projects with narrow construction sites, restricted mud vehicles, and tight construction schedules, it is often used. The situation that the duration of the node cannot be guaranteed
[0004] Moreover, in some unfavorable geology such as silty soil layers and sandy soils, the diameter expansion and shrinkage of the mud retaining wall piles often occur, and the filling coefficient of the concrete during construction remains high, resulting in waste of construction costs.
[0005] The conventional method of increasing the bearing capacity and pullout resistance of cast-in-situ piles is to increase the pile length and pile diameter, and gradually expand the pile bottom diameter to increase the force under the condition that the pile length remains unchanged, but the simple pile bottom diameter increases The force is limited
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[0030] See attached figure 1 , a dry-process rotary extrusion expanding pile device and its construction method, the device includes a walking and crawler-type main engine 1, a winch 2, a cab computer 3, a guide rod 4, a steel wire rope 5, a drilling speed controller 6, a feed Port 7, Rotary extrusion drill pipe 8, Rotary extrusion expansion drill bit 9, Discharge port 10, Concrete induction device 11, Self-soil extraction device 12, Pump truck conduit 13, Concrete pump truck 14
[0031] A construction method of a dry rotary extrusion pile forming device, characterized in that the rotary extrusion expansion drill bit 9 and the rotary extrusion expansion drill rod 8 cooperate with the drilling speed automatic control system to drill at a low speed, compact the soil around the pile to form a hole, and drill to the bottom of the pile. Expand the diameter of the rotary extruded drill bit 9, lift the rotary extruded expanded drill pipe 8, and inject concrete into the hole through t...
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Abstract
The invention discloses a dry-method rotary extruding and expanding pile forming device and a construction method thereof. The dry-method rotary extruding and expanding pile forming device comprises a walking type and crawler type main machine, a winch, a cab computer, a guide rod, a steel wire rope, a drilling speed controller, a feeding port, a rotary extruding and expanding drill rod, a rotary extruding and expanding drill bit, a discharging port, a concrete sensing device, a self-soil-taking device, a pump truck guide pipe and a concrete pump truck; the construction method is characterized in that a dry-method rotary extruding and expanding pile is built through the rotary compaction expanding pile forming device to form intermittent expanding of a pile bottom and a pile body, and the specific construction comprises the steps of drilling for hole forming, expanding of the pile bottom, concrete pouring, expanding of the pile body and the like. Compared with the prior art, in a soft soil area drilling process, an original pile body soil body is completely compacted into a pile hole peripheral soil body through the drill bit and the drill rod, hole forming unearthing is reduced, the stability of a pile hole peripheral hole wall is enhanced, the bearing capacity of the pile body is increased, the concrete filling coefficient is reduced, the construction cost is reduced, the construction efficiency of the cast-in-place pile in a soft soil area is improved, and investment and coordination of machinery, personnel and materials are reduced.
Description
technical field [0001] The invention relates to a pile-forming device and a construction method, which are mainly used in the construction of cast-in-place piles in soft soil layers. Background technique [0002] At present, cast-in-place piles are generally used for the enclosure structure of the foundation pits of one-story and two-story basements in coastal areas, and cast-in-place piles are generally used for super high-rise buildings. [0003] For the surrounding cast-in-place piles and cast-in-place pile foundations in soft soil areas, positive circulation or reverse circulation mud protection wall forming techniques such as pump suction and air lift are generally used. However, the construction technology of mud retaining wall piles is very low in single-machine construction efficiency, and a large amount of construction mud needs to be disposed of, which does not conform to the current green concept; for projects with narrow construction sites, restricted mud vehicle...
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