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Slant uplift pile in foundation pit

A technology for uplift piles and foundation pits, applied in sheet pile walls, foundation structure engineering, excavation, etc., can solve the problems of high pile arrangement costs, hidden dangers of construction safety, poor reliability of soil nails, etc., and achieve high prefabricated strength, Improve bearing capacity and save steel

Active 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

At present, the support for the side wall of the foundation pit is generally supported by cement-soil mixing piles plus row piles or soil nails. The cost of pile row is high, and the reliability of soil nails is poor. Potential safety hazards to building construction

Method used

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  • Slant uplift pile in foundation pit
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Examples

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Embodiment Construction

[0014] Such as figure 1 As shown, the present invention includes a cement-soil mixing pile 1 , a concrete columnar core 2 in the cement-soil mixing pile 1 , and a platform 3 .

[0015] still as figure 1 As shown, the coaxial line in the concrete columnar core 2 is provided with a prestressed steel cable 4, the lower end of the prestressed steel cable 4 is provided with an enlarged head, and the upper end of the prestressed steel cable passes through the side wall 7 of the foundation pit for tensioning, After passing through the supporting surface 3, it is connected and fixed by the connecting piece 5 (in this embodiment, the connecting piece 5 adopts an anchor clamp). The uplift pile is inclined to one side, and the vertical angle with the side wall 7 of the foundation pit is 60 degrees.

[0016] still as figure 1 As shown, the expansion head 6 is a concrete prefabricated part, and the expansion head 6 is provided with a hole, and the lower end of the prestressed steel rope...

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Abstract

The invention discloses a slant uplift pile in a foundation pit; the slant uplift pile comprises a cement mixing pile, a concrete columnar core and a supporting surface, wherein the slant uplift pile is characterized in that a prestressing force steel noose is arranged in the concrete columnar core in a coaxial line; at least one expanded head is arranged on the prestressing force steel noose; and the upper end of the prestressing force steel noose passes through the side wall of the foundation pit to be tensioned and then penetrates through a hole arranged on the supporting surface to be fixedly connected. As the expanded head is arranged at the lower part of the steel noose, the precasting strength of concrete is high, and the concentration of local stress is greatly reduced. As the expanded head, the concrete at the upper part of the expanded head and a cement mixing pile are connected into a semi-rigid integral body, the uplift frictional force is diffused to a peripheral soil body so that the bearing capacity of a prestressing force composite file is increased. The strength of the steel noose is 5-8 times of that of a common steel bar; and therefore, lots of steel products are saved.

Description

technical field [0001] The invention relates to the construction field, in particular to an uplift-resistant pile. Background technique [0002] In recent years, with the development and utilization of underground space, a large number of new underground garages have been built, and foundation pit support has become a problem that cannot be ignored in civil engineering construction. At present, the support for the side wall of the foundation pit is generally supported by cement-soil mixing piles plus row piles or soil nails. The cost of pile row is high, and the reliability of soil nails is poor. It will bring safety hazards to building construction. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an oblique anti-uplift pile for foundation pit, which has better support and anti-uplift effects. [0004] The present invention is realized through the following technical solutions: [0005] An oblique anti-lifting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/58E02D17/02
Inventor 从卫民
Owner 从卫民