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Steel cable with expansion heads

A technology of expanding head and steel cable, which is applied in construction, sheet pile wall, foundation structure engineering, etc., can solve the problems of reduced friction between soil and piles, easy corrosion of steel bars, affecting pile pressure and tensile resistance, etc., to improve bearing capacity force, saving steel, and reducing the concentration of local stress

Inactive Publication Date: 2012-02-08
从卫民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, building pile foundations are usually mainly pressure-bearing. Due to the development and utilization of underground space in recent years and the large number of new underground garages, the anti-floating of pile foundations has become a new hot issue.
Most of the traditional uplift piles adopt non-prestressed reinforced concrete structure. When the steel bars are stretched longitudinally, the pile body will shrink radially, resulting in a reduction of the friction between the soil and the pile. At the same time, when the pile body is stretched and cracked, the buried Steel bars are prone to corrosion, which will also affect the pressure and tensile strength of piles

Method used

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  • Steel cable with expansion heads
  • Steel cable with expansion heads
  • Steel cable with expansion heads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 As shown, one end of the steel rope 1 is provided with an enlarged head 2. The enlarging head 2 is a concrete prefabricated part.

[0020] still as figure 1 As shown, the concrete prefabricated part includes a steel backing plate 5 , a connecting steel bar 6 arranged perpendicular to the steel backing plate 5 , and a spiral bar 7 wound around the connecting steel bar 6 . A hole 3 is provided on the prefabricated part, and the hole 3 is a central hole passing through the steel backing plate and its concrete prefabricated part. The steel cable 1 passes through the hole 3, and is connected and fixed at the end of the steel backing plate 5 through the connecting piece 4 (in this embodiment, the connecting piece 4 is an anchor clamp).

Embodiment 2

[0022] Such as figure 2 As shown, one end of the steel rope 1 is provided with an enlarged head 2. The enlarging head 2 is a concrete prefabricated part.

[0023] The concrete prefabricated part includes a steel backing plate 5 , a connecting steel bar 6 arranged perpendicular to the steel backing plate 5 , and a spiral bar 7 wound around the connecting steel bar 6 . The steel backing plate 5 is provided with a central hole, and the steel rope 1 is connected and fixed through the connecting piece 4 after passing through the central hole, and the steel rope 1 is bonded in the concrete prefabricated part. All the other implementations are as in Example 1.

Embodiment 3

[0025] Such as image 3 As shown, the steel cable 1 is provided with three enlarging heads 2 successively from one end to the other end. The expanding head 2 is an extrusion anchor.

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PUM

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Abstract

The invention discloses a steel cable with expansion heads. At least one expansion head is arranged on the steel cable, and the expansion head is a screw nut or extrusion anchor or concrete prefabricated element. When the number of the expansion head is one, the expansion head is arranged at one end of the steel cable. When the number of the expansion heads is more than two, the expansion heads are in sequential arrangement from one end of the steel cable to the other end of the steel cable. The steel cable is arranged in a pile foundation, the lower part of the steel cable is provided with the expansion heads, the concrete prefabrication intensity is high, the local stress concentration is greatly reduced, the carrying force of a presetressed composite pile is improved, and a large number of steel materials can also be saved.

Description

technical field [0001] The invention relates to the construction field, in particular to a strengthening device for building pile foundations. Background technique [0002] At present, building pile foundations are usually mainly pressure-bearing. Due to the development and utilization of underground space in recent years and the large number of new underground garages, the anti-floating of pile foundations has become a new hot issue. Most of the traditional uplift piles adopt non-prestressed reinforced concrete structure. When the steel bars are stretched longitudinally, the pile body will shrink radially, resulting in a decrease in the friction between the soil and the pile. Steel bars are prone to corrosion, which will also affect the pressure and tensile strength of piles. In order to solve the above problems, the applicant proposes a composite prestressed anti-uplift pile with an enlarged head, which has better anti-floating and anti-uplift effects, simple preparation,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/54E02D5/48E02D5/58
Inventor 从卫民
Owner 从卫民