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Stirring pile-permeable concrete pile compound foundation and treatment method thereof

A technology for concrete piles and composite foundations, which can be used in sheet pile walls, soil protection, infrastructure engineering, etc., and can solve problems such as low cost

Active Publication Date: 2012-12-26
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with rigid piles, the cost of mixing piles is low, but it has a certain limit to the improvement of the bearing capacity of composite foundations, and its bearing capacity is generally not greater than 160kPa. When the bearing capacity of composite foundations is higher, mixing piles no longer have advantages

Method used

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  • Stirring pile-permeable concrete pile compound foundation and treatment method thereof
  • Stirring pile-permeable concrete pile compound foundation and treatment method thereof
  • Stirring pile-permeable concrete pile compound foundation and treatment method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1: Cement mixing pile-permeable concrete pile composite foundation

[0053] As shown in Figure 5(a) and Figure 5(b), the cement mixing pile-permeable concrete pile composite foundation pile body is arranged in a square or a triangle, and the cement mixing pile and the permeable concrete pile are arranged in separate rows. Lay a gravel cushion on the foundation surface with a thickness of 15-30cm. The pile distance between every two piles in each row of mixing piles or permeable concrete piles is 3-4 times the diameter of the permeable concrete piles. The diameter of the permeable concrete pile is 0.8-1.0 times the diameter of the mixing pile.

[0054] During construction, the permeable concrete pipe piles shall be constructed first, and then the cement mixing piles shall be constructed, with an interval of not less than 10 days. The verticality error of all piles shall not be greater than 1%.

[0055] The design compressive strength of permeable concrete is 2...

Embodiment 2

[0057] Example 2: Lime mixing pile-permeable concrete pile composite foundation

[0058] As shown in Figure 5(a) and Figure 5(b), the lime mixing pile-permeable concrete pile composite foundation pile body is arranged in a square or triangle, and the lime mixing pile and the permeable concrete pile are arranged in separate rows. Lay a gravel cushion on the foundation surface with a thickness of 15-30cm. The pile distance between every two piles in each row of mixing piles or permeable concrete piles is 3-4 times the diameter of the permeable concrete piles. The diameter of the permeable concrete pile is 0.8-1.0 times the diameter of the mixing pile.

[0059] During construction, the permeable concrete pipe pile shall be constructed first, and then the lime mixing pile shall be constructed, and the interval shall not be less than 10 days. The verticality error of all piles shall not be greater than 1%.

[0060] The compressive strength of permeable concrete is 20MPa, and the...

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Abstract

The invention discloses a stirring pile-permeable concrete pile compound foundation, which comprises a plurality of rows of stirring piles and permeable concrete piles, wherein the stirring piles and the permeable concrete piles are arranged in a row spacing way; and a gravel cushion layer is paved on the surface of the foundation on the upper parts of the stirring piles and the permeable concrete piles. The invention discloses a method for treating the foundation simultaneously. The compound foundation has high bearing capability and high permeability, post-construction settlement can be effectively reduced, and the liquefaction resistance of the foundation can be improved. Meanwhile, under the action of drainage consolidation, the compound foundation can be used for eliminating engineering diseases caused by stirring pile construction.

Description

technical field [0001] The invention relates to a civil engineering technology, in particular to a mixing pile-permeable concrete pile composite foundation and a processing method thereof. Background technique [0002] In the past two decades, the foundation treatment technology has been greatly developed, and the composite foundation technology is the most widely used. Composite foundation means that part of the soil of the natural foundation is reinforced or replaced during the foundation treatment process. Vertical reinforcements in composite foundations can generally be divided into bulk material piles, flexible piles (or semi-rigid piles) and rigid piles. Among them, flexible piles generally refer to stirring piles. The ground treatment method of mixing piles is to use cement and / or lime as the curing agent, through a special deep mixing machine, use compressed air to spray lime or cement, and forcefully mix with the foundation soil on the spot, using the solidificati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/00E02D5/34E02D5/46
Inventor 崔新壮金青高智珺张炯
Owner SHANDONG UNIV
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