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Pile forming method and device for screwed pedestal pile with large flow concrete filled by hole drilling pump

A technology of concrete bottom expansion screw and large flow, which is applied in the direction of drill bits, drill pipes, drill pipes, etc., can solve the problems of cylinder piston rods that cannot meet the rapid elongation, and steel wire ropes with large stretching elasticity, so as to achieve simple and ingenious design and increase service life , fast effect

Inactive Publication Date: 2008-12-10
刘润郊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, practice has proved that the stroke of the piston rod of the oil cylinder cannot meet the requirements of the rapidly elongated rope pitch due to the large telescopic elasticity of the steel wire rope in the above scheme.

Method used

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  • Pile forming method and device for screwed pedestal pile with large flow concrete filled by hole drilling pump
  • Pile forming method and device for screwed pedestal pile with large flow concrete filled by hole drilling pump
  • Pile forming method and device for screwed pedestal pile with large flow concrete filled by hole drilling pump

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Experimental program
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specific Embodiment approach 1

[0034] Specific embodiment one (referring to Fig. 1) this embodiment method is realized through the following steps:

[0035] 1. After the auger drilling machine drills the hole to the design elevation, start the mud pump, press the grout into the hole through the grout hole (35) on the elbow of the pumping concrete rotary joint, and at the same time lift the drilling tool and pull the hydraulic control lever to make The oil cylinder works to open the reaming plate (knife) to ream the hole (of course, the rolling thread plate has also been opened at this time), and the height of the reaming hole is 1-1.5m

[0036] 2. Fall back the drilling tool to the bottom of the hole. When the drilling tool is lifted again 20-30cm away from the bottom of the hole, turn on the concrete pump to press the concrete, and pour the concrete while pressing, and lift the drilling tool while rotating and expanding the bottom, and press the grout to expand the hole. At the upper edge (at 1-1.5m), stop...

specific Embodiment approach 2

[0039] Specific embodiment two: (see Fig. 2, Fig. 3, Fig. 4, Fig. 5, Figure 6 , Fig. 7) the piling device of the present embodiment is made of movable drill bit plate 25, bottom expansion oil cylinder 4, rolling (drawing) threaded oil cylinder 5, reaming (mouth) plate (knife) 7, rolling (drawing) threaded plate ( Wheel) 8, oil inlet pipe 3, and oil return pipe 10 complete bottom expansion (hole) and rolling (drawing) thread. The hollow rotary dual-purpose joint device is respectively provided with a rotating hollow shaft 27, an outer jacket (non-rotating) 26, an upper flange 24, a lower flange 25, a first oil sealing ring 28, a second oil sealing ring 29, and a third oil sealing ring. The ring 30, the oil inlet hole 1, the oil inlet channel 2, the oil return channel 11, the oil return channel hole 32, the thrust first bearing shaft 31, and the second bearing 33 form a rotary oil supply and oil return system.

[0040] When the hydraulic oil is pumped out of the hydraulic stati...

specific Embodiment approach 3

[0041] Specific embodiment three, (see Fig. 4, Figure 6) after the expansion of the bottom (hole) is completed, when the piston rod of the oil cylinder retracts and drives the expansion plate (knife) to return to its original position; and the rolling (drawing) plate (wheel) 8 cannot go back, and it can only be removed after it is piled. Press back. Its reason is: when the oil cylinder piston rod rotates the rolling movable plate (wheel) along the fixed pin shaft 18 and turns to the hole wall, the spring bayonet pin shaft (15) that is arranged on the back of its liner plate 14 will pop out automatically, and it cannot be stuck. turn around. And because the piston rod top is not a dead connection with it, a stressed top plate 13 is welded on its upper end, and it will not be affected when the piston rod completes the mission and withdraws.

[0042] When reaming and rolling (drawing) threads, due to the large resistance of the mud and sand on the wall of the hole, the diameter...

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Abstract

The invention relates to a pile-forming method for drilling-pump poured high-flow concrete expanded-bottom screw piles as well as a device thereof, aiming to solve the technical problem that the prior art cannot integrate bottom expansion with pile body threading for concrete filling piles through one step. The method comprises the following steps that: after a hole is drilled to a designed elevation, grouting, drilling tool lift and bottom expansion are carried out, and the bottom expansion height is between 1 and 1.5 m; after a drilling tool is dropped to a position which is 30 to 50 cm away from the bottom of the hole, concrete grouting is carried out; when the drilling tool is lifted to an upper bottom expansion edge, grouting is stopped and a bottom expander is reset; then concrete compression, drilling tool lift and thread rolling to an orifice are carried out simultaneously; and the drilling tool is lifted out, and a steel reinforcement cage is dropped for forming a pile. The pile-forming device is a hollow revolving dual-purpose piecing device, and is connected respectively with oil cylinders of the bottom expander and a thread rolling device through a tee, so as to expand bottom and roll thread. The device is characterized in simple structure, ingenious design, easy operation, etc.

Description

Technical field: [0001] The invention relates to a pile forming method and a machine tool for pile foundation engineering construction. Background technique: [0002] In the field of pile foundation construction at present, there have been multiple methods of drilling and enlarging the bottom, manufacturing methods of threaded piles and pile-forming devices. [0003] For example, the invention patent, a construction method of cast-in-place piles, patent No. 96119602.5, relates to a construction method of threaded piles. This method is very good, but its equipment is too large, the cost is too high, and the synchronization problem is difficult to solve, so Not easy to promote. [0004] Invention patent, construction method of threaded pile with superfluid concrete pumping in the center of auger drill pipe and its thread making device, patent application number 200510010093.7. This method just tells people to make screw thread with hydraulic jack, but does not tell by what d...

Claims

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Application Information

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IPC IPC(8): E02D5/36E21B17/22E21B10/44E21B10/26
Inventor 刘润郊
Owner 刘润郊