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Multifunctional stress dispersing type expansive concrete steel pipe pile and construction method

A technology of expanded concrete and stress dispersion, applied in sheet pile walls, infrastructure engineering, construction, etc., can solve the problems of small surface friction of ordinary steel pipe piles, difficult to control construction quality, and concealed construction process, so as to improve the pullout resistance. Anti-floating performance, improve the effect of anti-lifting and anti-floating and bearing capacity, and strengthen the anti-lifting and anti-floating

Inactive Publication Date: 2018-06-15
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Steel pipe piles have high overall strength, good tensile and compressive resistance, and uniform material. Compared with concrete prefabricated piles, they are light and strong, easy to transport, and fast in construction. However, ordinary steel pipe piles have small surface friction and are easy to settle. , and easy to separate from the internal concrete; the concrete pile has good compressive performance and low cost, but its tensile performance is poor, so it cannot be used as an uplift pile, and it is prone to cracks.
Cast-in-situ piles have flexible reinforcement configuration, good mechanical performance, good seismic performance, and little impact on the environment, but the construction process is hidden, the process is complicated, the pile is prone to breakage, and the construction quality is difficult to control

Method used

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  • Multifunctional stress dispersing type expansive concrete steel pipe pile and construction method
  • Multifunctional stress dispersing type expansive concrete steel pipe pile and construction method
  • Multifunctional stress dispersing type expansive concrete steel pipe pile and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] like Figure 1-9 As shown, a multi-functional stress dispersion type expanded concrete steel pipe pile, which includes a steel pipe pile 1, the steel pipe pile 1 is the main structure, and holes are evenly distributed on the side wall of the steel pipe pile 1, so that The position where the hole is located is hinged with a wing plate through the wing plate rotation shaft 4; the bottom of the steel pipe pile 1 is poured with a back-sealing concrete 5, and the section of the length of the steel pipe pile 1 where the wing plate is located is poured with an expanded concrete 8. Ordinary concrete 7 is poured between adjacent expansive concrete 8 , and sealing concrete 10 is poured on the top of the steel pipe pile 1 . By adopting the above-mentioned steel pipe pile 1, different forms of stress-distributing expansion bodies are formed near the holes, so that the pressure or tension can be evenly distributed, and can be applied to different foundations. While giving full play...

Embodiment 2

[0064] like Figure 1-4 , the upper-end open flange steel pipe pile has good bearing capacity and is suitable for construction under general geological conditions. The lower-end open flange steel pipe pile has good anti-lifting and anti-floating performance and can be used for construction in groundwater environments.

[0065] The construction method of any multifunctional stress dispersion type expanded concrete steel pipe pile is characterized in that it comprises the following steps:

[0066] Step 1: The holes in the pile body are laid out. According to the geological conditions and the bearing capacity requirements of the single pile, a wing plate matching the shape and size of the hole is set on the pile body, and the steel pipe pile 1 is connected to the steel pipe pile 1 through the rotation axis 4 of the wing plate;

[0067] Step2: Back cover, use back cover concrete 5 for back cover, and add a partition plate 9;

[0068] Step3: Drill the hole, drill to the design dep...

Embodiment 3

[0073] like Figure 5-7 , which mainly introduces the general construction method of the crescent-shaped, herringbone-shaped and segmented spiral hole steel pipe piles of the present invention. This kind of steel pipe piles is suitable for construction under general geological conditions.

[0074] Step1: Pile body hole layout, according to geological conditions and single pile bearing capacity requirements, choose to set crescent-shaped holes 11, herringbone holes 12 or segmented spiral holes 13 holes in the pile body;

[0075] Step2: Drill the hole, drill the hole to the design depth, and immediately lower the pipe, and prevent the hole wall from collapsing during the lowering process;

[0076] Step3: Back cover, use back cover concrete 5 for back cover, and proceed to the next step when the concrete strength reaches 75%;

[0077] Step4: Pile body material pouring, the full length can be poured with expansive concrete or a certain amount of crushed stone6, until the grouting...

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PUM

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Abstract

The invention relates to a multifunctional stress dispersing type expansive concrete steel pipe pile and a construction method. The steel pipe pile serves as a main structure. Holes in different formsare evenly distributed in a pile body, and expansive concrete is poured into the pile body or the expansive concrete and ordinary concrete are poured into the pile body segment by segment, a high-pressure grouting process is used in cooperation, stress dispersing expansive bodies in different forms are formed near the holes, meanwhile, a certain number of broken stones are selectively added, thecost is saved, the bottom end can be sealed through the ordinary concrete, and the bottom end can also be combined with a claw-type support to form a composite foundation. The reinforcing effect is obvious, the construction speed is high, the stress is evenly dispersed along the pile length, forward stress dispersing expansive bodies and backward stress dispersing expansive bodies achieve good compression resisting performance, anti-pulling performance and anti-floating performance, differential settlement is effectively reduced, and different pile types and construction methods can be selected according to different foundations.

Description

technical field [0001] The invention relates to the fields of architecture and civil engineering construction, in particular to a multifunctional stress-dispersing expansion concrete steel pipe pile and a construction method. Background technique [0002] In recent years, with the development of economy and science and technology, the construction industry has developed rapidly. In order to improve the stability of the building and the bearing capacity of the foundation, the foundation type of building construction in my country generally chooses pile foundation. According to the purpose and structural characteristics of the building, as well as the requirements for the foundation, different pile foundation types and construction techniques can be selected to ensure the safety of the building. [0003] The foundation piles used for buildings can be roughly divided into: steel pipe piles, concrete piles and cast-in-place piles. Steel pipe piles have high overall strength, go...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/38
CPCE02D5/38
Inventor 刘杰冯世国付玲莉兰俊黄飞
Owner CHINA THREE GORGES UNIV
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