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Post-tensioned pre-stressed compound uplift pile

A technology of post-tensioned prestressed and uplift piles, which is applied to sheet pile walls, buildings, and foundation structure engineering, can solve the problems of waste of materials, large piles, and uneconomical problems, and achieve obvious economic benefits and small piles Effect

Active Publication Date: 2012-02-29
从卫民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The piles of this structure have the advantages of saving steel, improving the rigidity and crack resistance of the pile body, but there are also obvious defects, that is, the pull-out bearing capacity is only the friction between the pile body and the soil, and the required pile body is relatively large. Large and long, waste of material, uneconomical

Method used

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Examples

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Embodiment Construction

[0018] Such as figure 1 , 2 As shown, the present invention includes a cement-soil mixing pile 1, a reinforced concrete columnar core 2 in the cement-soil mixing pile 1, and a cap surface 3 arranged at the upper end of the pile. The inner coaxial line of the columnar core 2 is provided with a post-tensioned prestressed steel cable 4, and the steel cable 4 is arranged around the peripheral part of the columnar core 2, and is arranged at intervals with the pre-tensioned prestressed steel bars of the steel cage skeleton 9 in the columnar core , which is connected to the steel cage skeleton 9.

[0019] Such as figure 1 , 3 As shown, the post-tensioned steel cable 4 is provided with an enlarged head 5 , and the enlarged head 5 is arranged at the lower end of the steel cable 4 . In this embodiment, the expanding head 5 is an extruded anchor, and a steel backing plate 7 is provided on the post-tensioned steel cable 4 above the extruded anchor. still as figure 1 , 3 As shown, t...

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Abstract

The invention discloses a post-tensioned pre-stressed compound uplift pile, which comprises a cement mixing pile, wherein a reinforced concrete cylindrical core in the cement mixing pile is arranged on a cushion cap surface at the upper end of the pile. The post-tensioned pre-stressed compound uplift pile is characterized in that: a post-tensioned pre-stressed steel strand cable is arranged coaxially in the cylindrical core, and is provided with at least one extension head; the steel strand cable is arranged around the periphery of the cylindrical core; the steel strand cable is fixed through a connecting piece after tensioning; and the steel strand cable and the connecting piece thereof are positioned in the cushion cap surface. The post-tensioned pre-stressed compound uplift pile has the advantages that: the compound uplift advantages of the cement mixing pile and reinforced concrete are brought into full play, a larger friction surface is formed, a required concrete pile has a small pile body, and the economic benefit is remarkable.

Description

technical field [0001] The invention relates to the construction field, in particular to an uplift-resistant pile. Background technique [0002] At present, the prestressed pullout piles that have been applied are ∮500-∮800 piles equipped with 4-12 unbonded steel strands according to the pullout load, and tied to the steel cage. The lower end of the steel strands is unbonded, and the bottom is made of The pressure-bearing steel plate is fixed, and the tension begins after the concrete strength reaches more than 75%, and the anchor is anchored after tension. [0003] The piles of this structure have the advantages of saving steel, improving the rigidity and crack resistance of the pile body, but there are also obvious defects, that is, the pull-out bearing capacity is only the friction between the pile body and the soil, and the required pile body is relatively large. Large and long, a waste of materials, uneconomical. Contents of the invention [0004] The technical prob...

Claims

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Application Information

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IPC IPC(8): E02D5/58E02D5/48E02D5/50
Inventor 从卫民
Owner 从卫民
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