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Concrete pipe pile for treating thaw collapse of island-shaped frozen soil foundation, and construction method of concrete pipe pile

A technology for concrete pipe piles and permafrost foundations, which is applied in foundation structure engineering, sheet pile walls, buildings, etc., can solve problems such as excessive heat, easy damage to the soil between piles, and damage to the stability of the permafrost layer, so as to promote the overall Load bearing capacity and the effect of improving load bearing characteristics

Pending Publication Date: 2019-09-06
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lime pile pre-thawing technology, the distance between the piles is too small, the soil between the piles is easily damaged during the piling process, and the lime will generate more heat when it meets water, which destroys the stable state of the permafrost

Method used

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  • Concrete pipe pile for treating thaw collapse of island-shaped frozen soil foundation, and construction method of concrete pipe pile
  • Concrete pipe pile for treating thaw collapse of island-shaped frozen soil foundation, and construction method of concrete pipe pile
  • Concrete pipe pile for treating thaw collapse of island-shaped frozen soil foundation, and construction method of concrete pipe pile

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Embodiment Construction

[0033] The present invention is described in further detail below in conjunction with accompanying drawing:

[0034] Such as figure 1 As shown, the concrete pipe pile of the present invention includes a pile cap 1, a pile column 2, a groove 3, a sharp bottom cross steel pile tip 4 and a reinforcement 5.

[0035] Pile cap 1 is made of C25 concrete poured on site. The size of pile cap 1 should meet the requirements of bending resistance, punching resistance and shear resistance. Generally, it is 3 to 3.5 times the outer diameter of the pile 2; the thickness of the pile cap 1 is generally not greater than the outer diameter of the pile 2, and it is not less than 10 cm into the top of the pile 2 to prevent the pile cap 1 from tilting and falling off. Reinforcement 5 is arranged according to two-way uniform length, and the top of the pile is provided with two parallel first reinforcements extending into the pile cap, the first reinforcement is parallel to the axis of the pile, and...

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Abstract

The invention discloses a concrete pipe pile for treating thaw collapse of an island-shaped frozen soil foundation, and a construction method of the concrete pipe pile. The concrete pipe pile comprises a pile cap, a pile column and a pile tip which are sequentially connected; the end face area of the pile cap is larger than that of the pile column, the top of the pile column partially stretches into the bottom of the pile cap, the pile column is tubular, the top in the pile column and the pile cap are integrally connected, a plurality of grooves are formed in the peripheral face of the lower half part of the pile column, and the pile tip is made of cross-shaped conical steel; and when the pipe pile is arranged in the frozen soil foundation, the grooves of the pile columns are partially located below the upper limit of frozen soil, and the pile column stretches into the upper limit of the frozen soil by at least 3 m. Cohesion between the pile and a soil body and the bearing characteristic of soil between piles can be improved, and the carrying capacity of the foundation is improved.

Description

technical field [0001] The invention belongs to the field of engineering construction, and relates to a thaw-settled concrete pipe pile for treating island-shaped permafrost foundations and a construction method thereof. Background technique [0002] my country's island-shaped permafrost regions are located on the edge of continuous permafrost degradation. The temperature of permafrost is generally between 0 and -1°C, and most of them are high-temperature unstable permafrost, which are easily degraded rapidly by external interference, and have already degraded significantly. trend. With the construction of projects in island-shaped permafrost areas, the foundation will be disturbed and thawing will occur, which will lead to uneven deformation of the foundation of highway engineering and housing construction, resulting in deformation and failure of the superstructure of the foundation. Due to these characteristics of island frozen soil, its foundation treatment should reduce ...

Claims

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Application Information

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IPC IPC(8): E02D5/28E02D27/35
CPCE02D5/285E02D27/35
Inventor 赵影毛雪松张宝龙吴谦刘龙旗
Owner CHANGAN UNIV
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