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A concrete composite pile foundation structure

A concrete composite pile and concrete technology, which is applied in basic structure engineering, construction, etc., can solve the problems of difficult implementation and insufficient strength, and achieve the effects of prolonging setting time, increasing compactness, bearing capacity and lateral resistance.

Active Publication Date: 2017-07-28
NANYANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the relatively high height of the pile foundation, it is difficult to implement the work of strengthening the skeleton by pressing the propulsion frame; in addition, relying on short rods and long rods to strengthen the skeleton is not strong enough

Method used

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  • A concrete composite pile foundation structure
  • A concrete composite pile foundation structure
  • A concrete composite pile foundation structure

Examples

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Effect test

preparation example Construction

[0044] Wherein the preparation method of composite reinforcing fiber comprises the following steps:

[0045] After mixing polyurethane rubber powder and alkali-resistant glass fiber powder, immerse in the ethanol solution of butadiene triethoxysilane, ultrasonically react for 2 hours, and then use ethanol solution to clean and remove excess butadiene triethoxy on the surface of the fiber Silane is mixed with steel fibers after drying to prepare composite reinforcing fibers. In this example, the weight ratio of polyurethane rubber powder, steel fibers and alkali-resistant glass fiber powder is 1.5:3:0.8.

[0046] Among them, the alkali-resistant glass fiber powder has a length of 30-50mm, a single filament diameter of 11-15μm, and a density of 2.7g / cm 3 The alkali-resistant glass fiber is ground into alkali-resistant glass fiber powder with a particle size of ≤100 μm.

[0047] The diameter of the steel fiber is 0.2-0.3 mm, the length is 10-15 mm, and the tensile strength is 40...

Embodiment 2

[0049] Embodiment 2 is the same as the concrete composite pile foundation structure in Embodiment 1, the difference is:

[0050] Concrete includes the following raw materials in parts by weight: P.O 42.5 Portland cement 285 parts, coal ash powder 62 parts, mineral powder 22 parts, silica fume 18 parts, fine aggregate 850 parts, coarse aggregate 1090 parts, water 150 parts 6 parts, 6 parts of polycarboxylate superplasticizer, 23 parts of composite reinforcing fiber, 70 parts of polyvinyl acetate emulsion, 7 parts of dispersant sodium methylcellulose, 0.45 part of silicone oil.

[0051] Among them, the fine aggregate is medium sand, the fineness modulus is 3.0, and the mud content is 1% to 1.5%.

[0052] Among them, the coarse aggregate is stone, with a mud content of ≤2% and a particle size of ≤35mm.

[0053] Wherein the preparation method of composite reinforcing fiber comprises the following steps:

[0054] After mixing polyurethane rubber powder and alkali-resistant glass ...

Embodiment 3

[0058] Embodiment 3 is the same as the concrete composite pile foundation structure in Embodiment 1, the difference is:

[0059] Concrete includes the following raw materials in parts by weight: P.O 42.5 Portland cement 290 parts, coal ash powder 64 parts, mineral powder 24 parts, silica fume 15 parts, fine aggregate 800 parts, coarse aggregate 1080 parts, water 160 parts 7 parts of polycarboxylate superplasticizer, 25 parts of composite reinforcing fiber, 60 parts of polyvinyl acetate emulsion, 4 parts of dispersant methyl cellulose and sodium methyl cellulose, 0.5 part of silicone oil.

[0060] Among them, the fine aggregate is medium sand, the fineness modulus is 3.0, and the mud content is 1% to 1.5%.

[0061] Among them, the coarse aggregate is stone, with a mud content of ≤2% and a particle size of ≤35mm.

[0062] Wherein the preparation method of composite reinforcing fiber comprises the following steps:

[0063] After mixing polyurethane rubber powder and alkali-resi...

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Abstract

The invention discloses a concrete composite pile foundation structure. The concrete composite pile foundation structure comprises a bearing table (1), a reinforcement cage (2) and concrete (3); the reinforcement cage (2) comprises a main reinforcement cage body (4) and a pile expanded reinforcement cage body (5), and the pile expanded reinforcement cage body (5) comprises a transition reinforcement cage body (7) and a pile head reinforcement cage body (10); the main reinforcement cage body (4) is hinged to the transition reinforcement cage body (7), and the transition reinforcement cage body (7) is hinged to the pile head reinforcement cage body (10); a horizontal elastic part (9) is arranged in the transition reinforcement cage body (7), and a vertical elastic part (8) is arranged at the bottom end of the pile head reinforcement cage body (10); and a pressing rod (6) is fixedly connected to the vertical elastic part (8). The bearing force and transverse resistance of the concrete composite pile foundation structure are high, and the structure is resistant to drawing, simple in structure, simple in pile forming technology and low in cost.

Description

technical field [0001] The invention relates to the technical field of building structures, in particular to a concrete composite pile foundation structure. Background technique [0002] During the construction of high-rise buildings and bridges, pile foundations need to be prepared. The pile foundation structure commonly used in the prior art is to hang a cylindrical steel cage in the pile hole and then pour concrete. The pile foundation of this structure is tensile The ability to pull out and resist lateral stress is weak. [0003] Chinese patent CN 204551446 U discloses a pullout-resistant pile foundation structure, including a pile body and a pile tip, the pile body has a hollow structure for filling core-filled concrete, and the outer surface below the pile body is provided with A plurality of annular convex ribs, the diameter of the cross-sectional area of ​​the annular convex rib is greater than the diameter of the pile body, the top of the hollow structure is a coni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D27/12C04B28/04
CPCC04B28/04C04B2201/10C04B2201/50C04B2201/52E02D27/12C04B18/08C04B18/12C04B14/062C04B14/02C04B14/06C04B2103/302C04B14/44C04B24/2623C04B24/383C04B24/42
Inventor 张树珺徐留中陈珂魏焕敏邵海涛石磊任凌辉张沛张滨
Owner NANYANG INST OF TECH
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