Multi-head stirring type large-diameter cast-in-situ pipe pile device and application thereof

A large-diameter pipe and agitation technology, which is used in drilling driving devices, sheet pile walls, drilling equipment and other directions in the wellbore, can solve the problems of significant soil squeeze effect and difficult construction of immersed tubes, and achieve clear construction technology, The effect of good piling effect and fast construction speed

Active Publication Date: 2016-01-13
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: In order to solve the technical problems such as the difficulty of immersed pipe construction and the significant soil squeezing effect when the wall thickness of the cast-in-place large-diameter pipe pile is large, the present invention provides a multi-head stirring type cast-in-place large-diameter pipe pile device and its construction method

Method used

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  • Multi-head stirring type large-diameter cast-in-situ pipe pile device and application thereof
  • Multi-head stirring type large-diameter cast-in-situ pipe pile device and application thereof
  • Multi-head stirring type large-diameter cast-in-situ pipe pile device and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This implementation provides a method for preparing cast-in-situ large-diameter pipe piles with an outer diameter of 1200mm, a wall thickness of 300mm, and a depth of 20m.

[0035] First set out the stake, release the actual sample according to the construction drawings; excavate the trench, remove the ground and underground debris; then set the guide positioning line; determine the center position of the cast-in-place large-diameter pipe pile, and at the same time determine the annular combined drill pipe 6 s position.

[0036]The multi-head mixing type cast-in-place large-diameter pipe pile device is in place and the cement slurry is prepared: check the length of the annular combined drill pipe 6, the diameter of the drill bit, connect the delivery pipeline, and move the multi-head stirring type cast-in-place large-diameter pipe pile device to the designated position The center of the annular composite drill pipe 6 is aligned with the design center of the pipe pile, a...

Embodiment 2

[0041] This implementation provides a method for preparing cast-in-situ large-diameter pipe piles with an outer diameter of 1500mm, a wall thickness of 350mm, and a depth of 25m.

[0042] First set out the stake, release the actual sample according to the construction drawings; excavate the trench, remove the ground and underground debris; then set the guide positioning line; determine the center position of the cast-in-place large-diameter pipe pile, and at the same time determine the annular combined drill pipe 6 s position.

[0043] Pile driver in place and cement slurry preparation: check the length of the annular composite drill pipe 6, the diameter of the drill bit, connect the delivery pipeline, move the pile driver to the designated position, and align the center of the annular composite drill pipe 6 with the design center of the pipe pile. The rods are aligned with each mixing point; the cement slurry is mixed, and the pipeline is connected to the grouting port 8, tha...

Embodiment 3

[0048] This implementation provides a method for preparing cast-in-situ large-diameter pipe piles with an outer diameter of 2000mm, a wall thickness of 400mm, and a depth of 30m.

[0049] First set out the stake, release the actual sample according to the construction drawings; excavate the trench, clear the ground and underground debris; Combined drill pipe 6 position.

[0050] Pile driver in place and cement slurry preparation: check the length of the annular composite drill pipe 6, the diameter of the drill bit, connect the delivery pipeline, move the pile driver to the designated position, and align the center of the annular composite drill pipe 6 with the design center of the pipe pile. The rods are aligned with each mixing point; the cement slurry is mixed, and the pipeline is connected to the grouting port 8, that is, after the mixer sinks to a certain depth, the cement slurry is configured according to the design mix ratio and delivered to the drill bit.

[0051] Stir...

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Abstract

The invention discloses a multi-head stirring type large-diameter cast-in-situ pipe pile device. The multi-head stirring type large-diameter cast-in-situ pipe pile device comprises a main unit, a winch, a drill stem assembly, a positioning frame, a power device and a background concrete processing system. The main unit and the winch are sequentially arranged on a base. The drill stem assembly is fixed to the top of the positioning frame, and all drill stems work at the same time during one-time drilling. The end-to-end closed multi-head stirring type large-diameter cast-in-situ pipe pile device is formed through simultaneous pile sinking of the multiple annular drill stems during construction by adjusting the angles of the drill stems. By means of the device, the application range of a cement mixing pile is widened; in addition, the outer wall of a multi-head stirring type large-diameter cast-in-situ pipe pile is in a wavy stripe shape, in this way, the contact area between the pile and soil is greatly increased, and the side friction resistance of the pile can be improved. According to the multi-head stirring type large-diameter cast-in-situ pipe pile device, the construction technique is clear, the construction speed is high, the pile forming effect is good, the bearing capacity is high, and manufacturing cost is low.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a multi-head stirring type cast-in-place large-diameter pipe pile device and its application. Background technique [0002] Pipe piles include prefabricated prestressed pipe piles and cast-in-place pipe piles; prefabricated prestressed pipe piles have the advantages of high strength, easy prefabrication of length specifications, and good factory production quality, but there is also a large soil squeezing effect during on-site construction. Disadvantages such as inconvenient transportation; cast-in-place pipe piles (such as PCC piles, etc.) have been widely used in engineering due to their large pile diameter and high bearing capacity, but when the pipe wall is thick or the pile diameter is too large, it will also cause The difficulty of on-site immersed tube construction increases, and the soil squeezing effect increases. Cement-soil mixing pile is a soft ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/46E21B4/16
Inventor 孔纲强周杨刘汉龙周航曹兆虎
Owner HOHAI UNIV
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