Unlock instant, AI-driven research and patent intelligence for your innovation.

A composite prestressed uplift pile with enlarged head

A technology of expanding head and pulling-resistant piles, applied in sheet pile wall, construction, foundation structure engineering, etc., can solve the problems of reducing the friction between soil and pile, affecting the bearing pressure and tensile strength of piles, and complex production process, and reducing the Concentration of local stress, improving bearing capacity and high precast strength

Active Publication Date: 2016-01-27
从卫民
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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
In recent years, the industry has continuously introduced prestressed steel cable pullout and anti-floating piles, but the production process is complicated and the steel consumption is also large

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A composite prestressed uplift pile with enlarged head
  • A composite prestressed uplift pile with enlarged head

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 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 cap surface 3 arranged at the upper end of the cement-soil mixing pile.

[0018] still as figure 1 As shown, the inner coaxial line of the concrete columnar core 2 is provided with a prestressed steel cable 4 (the steel cable 4 is set concentrically with the columnar core 2), the lower end of the steel cable 4 is provided with a first expansion head 6, and the upper end of the steel cable 4 A tensioned fixed connector 5 is provided, and the upper end of the steel cable and its connector 5 are located on the platform. In this embodiment the connectors are anchor clamps.

[0019] still as figure 1 As shown, the first enlarged head 6 is a concrete prefabricated part, and the concrete prefabricated part is provided with a hole, and the lower end of the prestressed steel cable 4 passes through the hole and is connected a...

Embodiment 2

[0023] Such as figure 2 As shown, the lower end of the prestressed steel rope 4 is provided with two expansion heads (the first expansion head 6 and the second expansion head 9) sequentially from bottom to top. Preparation process: pass the steel cable through the vibrating pipe from bottom to top, then put the vibrating pipe into the cement-soil mixing pile, withdraw the pipe upward while vibrating, pour concrete into the pipe at the same time, and then use a hammer to Hit the bottom to make the concrete bulge around, thus forming the second enlarged head. All the other implementations are as in Example 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a composite prestressed uplifting pile with an enlarged head, which comprises a cement-soil mixing pile, a concrete columnar core in the cement-soil mixing pile, and a bearing platform at the upper end of the cement-soil mixing pile, and is characterized by a concrete columnar core The inner coaxial line is provided with a prestressed steel cable, and the prestressed steel cable is provided with at least one expanding head, and the upper end of the prestressed steel cable passes through the bearing platform, and is fixed by a connecting piece after being stretched. The invention has better anti-floating and anti-pull effects, simple preparation and less steel consumption.

Description

technical field [0001] The invention relates to the construction field, in particular to an uplift-resistant pile. Background technique [0002] 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 recent years, the industry has continuously introduced prestressed steel cable pullout and anti-floating piles, but the manufacturing process is complicated and the amount of steel used is relatively large. Contents of the invention ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/58E02D5/50E02D5/48
Inventor 从卫民
Owner 从卫民