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High-bearing capacity prestressed tubular pile and its production method

A technology of prestressed pipe piles and bearing capacity, which is applied in the direction of strengthening and forming, which can solve the problems of construction cost, waste, and high construction cost of aggravated caps, and achieve the effects of reducing bursting piles, reliable quality, and improving structural mechanical properties

Active Publication Date: 2006-07-12
姜中云
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the limitation of the bearing capacity of single piles, in order to meet the high-tonnage bearing design requirements during construction, it is often necessary to use a pile group foundation with multiple piles sharing a cap, which increases the cost of cap construction, resulting in high construction costs and excessive waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] To produce 10 PSSC-ABΦ400 (150, C60) pipe piles, first make steel cages and connecting end plates according to the national standard process requirements of PC-ABΦ400 (95) pipe piles, and put them into steel molds, and concrete (see Table 3 ) is evenly injected into the steel mold with a feeder, and the steel mold is sealed; the steel mold is placed on a centrifuge and centrifuged (see Table 5), and the remaining slurry is poured after completion; the steel mold is placed obliquely at an inclination angle of 15° In order to prevent the loss of poured concrete, plugging treatment is carried out at the bottom, and concrete with a gravel specification of ≤25mm, a sand fineness modulus of 2.6, and a water-cement ratio of 0.28 is selected for secondary grouting (see Table 4), the amount of perfusion is 0.029m per meter 3 , the degree of compaction of the concrete is 1.1; the steel mold is placed on the centrifuge and centrifuged (see Table 5), and the remaining slurry is pou...

Embodiment 2

[0047] Repeat embodiment 1, have following difference: produce PSSC400-110 (C60) pipe pile, secondary filling amount is 0.01m 3 / m, the results of the experimental data wall thickness and structural ultimate bearing capacity meet the design requirements.

Embodiment 3

[0049] Repeat embodiment 1, have following difference: produce PSSC400-200 (C60) pipe pile, secondary filling amount is 0.03m 3 / m, after the second centrifugation, the wall thickness is 170mm; fill the core again, and the filling volume is 0.003m 3 / m, the wall thickness reaches 200 (that is, solid), and the result of the experimental data is that the wall thickness and the ultimate bearing capacity of the structure meet the design requirements.

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Abstract

The invention discloses a high bearing capacity prestressed pipe pile and relative producing method. The invention can overcome the thickness limit of wall of present technique via a plurality of filling and de-centering concrete to produce practical pipe pile even sincere post. With the increase of wall thickness of post, the forced surface of pipe pile and the structure mechanical property are improved. The tests prove that: the bearing ability of single post is improved significantly, with strong penetrate ability to rigid stratum and reduced post-explosion condition. The invention has simple process, reliable quality, and better market prospect.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a high bearing capacity prestressed pipe pile and a production method thereof. Background technique [0002] In the process of building construction, the use of pipe piles to construct and treat the foundation is a relatively mature foundation construction technology at this stage. The prestressed concrete pipe piles used are made by filling concrete in prefabricated steel cages and undergoing centrifugation, steam curing and other processes. Such products currently on the market mainly include: PTC prestressed thin-walled pipe piles (concrete strength grade: C60, wall thickness 20mm lower than PC pipe piles), PC prestressed pipe piles (concrete strength grade: C60) and PHC prestressed pipe piles. Three types of stressed high-strength pipe piles (concrete strength grade: C80). Due to the traditional one-time filling and one-time centrifugal technolo...

Claims

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Application Information

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IPC IPC(8): B28B21/68B28B21/66
Inventor 姜中云
Owner 姜中云
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