Piling sinking pipe for precast reinforced concrete bottom-expanding pile

A technology of expanding bottom piles and prefabricated steel, which is applied to sheet pile walls, buildings, infrastructure projects, etc., can solve the problems of increasing the inner diameter of the bottom of the immersed tube, the bottom expansion work cannot be carried out, and the smooth passage of the pile body is affected, and the reduction of Processing difficulty and cost, easy implementation, easy slotting effect

Inactive Publication Date: 2008-09-24
王国奋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The immersed tube is positioned with the excavating equipment with two "V"-shaped spiral grooves in cross-section. Only when the "V"-shaped spiral grooves have sufficient depth can the positioning be firm and reliable. The inner diameter of the bottom of the large immersed tube, and the inner diameter of the upper part should be kept larger than that of the lower part, and should be increased accordingly. Obviously, this is not advisable
If the upper and lower inner diameters remain unchanged, it will affect the smooth passage of the pile body in the immersed tube
And the current immersed tube is only suitable for use in the interior, and cannot be used in coastal areas, because when the metal pile head is taken out, a conical cavity is formed, there is a pressure difference between the outside of the tube and the inside of the tube, and the silt on the hard soil layer It is easy to enter into the conical cavity, so that the bottom expansion work cannot be carried out, and the use of immersed tubes in coastal areas is limited

Method used

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  • Piling sinking pipe for precast reinforced concrete bottom-expanding pile
  • Piling sinking pipe for precast reinforced concrete bottom-expanding pile
  • Piling sinking pipe for precast reinforced concrete bottom-expanding pile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 , Figure 2 and image 3 As shown, the outer wall of the bottom connected to the pipe body 1 is evenly distributed in the circumferential direction with at least two guide wings 3, and the inner side of the bottom is provided with positioning pins matching the positioning iron feet of the existing earth-moving equipment at the position corresponding to the guide wings 3. Groove 9, the upper port of the pipe body 1 is provided with a positioning mark at the position corresponding to the positioning groove 9 inside the bottom along the circumferential direction. Coinciding with the outer end of the positioning iron foot, the positioning groove 9 has two slopes which are the upper slope 6 of the positioning groove and the lower slope 8 of the positioning groove. The setting purpose of the two slopes is to gradually increase the depth of the positioning groove 9. The tube body 1 and the bottom are made into an integrated structure. The section of pipe body...

Embodiment 2

[0027] The sealing ring 2 described in Embodiment 1, such as Figure 4 Shown can adopt following structure: it is made of metal ring body 10 and the rubber ring 12 that is arranged on metal ring body 10 lower ends, and the diameter of rubber ring 12 is less than the diameter of metal ring body 10, and other structures are with embodiment one.

Embodiment 3

[0029] The sealing ring 2 described in Embodiment 1, such as Figure 5 The following structure can be adopted as shown: it consists of a metal ring body 10 and a circle of flange 11 located at its upper end. Other structures are the same as in Embodiment 1.

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Abstract

This invention relates to a piling equipment for immersed tube fabricated steel-concrete under-reamed pile. It contains hollow pile body and bottom with at least two guide wing set along cycle, wherein the positioning slot matched with positioning iron foot of excavator is located in place of inner side of bottom corresponded with guide wing. Compared with current technology, said invention has precision, firm and reliable positioning.

Description

technical field [0001] The invention relates to pile-forming equipment for prefabricated steel concrete expanded-bottom piles with sinking tubes, in particular to a pile-forming sinking tube for prefabricated steel-concrete expanded-bottom piles, and is a matching sinking tube for various prefabricated steel-concrete expanded-bottom piles. Background technique [0002] At present, in the pile foundation engineering of soft soil foundation, three kinds of cast-in-situ piles, prefabricated piles and large-diameter bored piles are generally used. Among them, the large-diameter bored pile has the highest bearing capacity, but its cost is the most expensive, the work efficiency is low, and the pollution is serious during construction. Therefore, it is usually only used in high-rise buildings with high bearing capacity requirements; prefabricated piles have good quality and high bearing capacity, but their cost is also high, and are generally used in buildings with higher safety l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/66E02D5/44
Inventor 王国奋
Owner 王国奋
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