An anti-seismic crack-proof prefabricated concrete square pile

Abstract

The invention discloses an antiseismic anti-cracking prefabricated concrete square pile. The antiseismic anti-cracking prefabricated concrete square pile is characterized in that concrete of per cubic meter of the square pile is prepared from the following raw materials in parts by weight: 125-135 parts of pebble, 350-480 parts of yellow sand, 98-102 parts of water reducing agent, 210-250 parts of cement, 34-45 parts of antiseismic mixture and 20-80 parts of anti-cracking polymer fiber mixture. The antiseismic anti-cracking prefabricated concrete square pile disclosed by the invention is fabricated by mixing the pebble, yellow sand, a water reducing agent, cement, an antiseismic mixture and an anti-cracking polymer fiber mixture at an appropriate ratio, so that the antiseismic anti-cracking properties of the concrete are improved, and therefore the antiseismic and anti-cracking properties of the prefabricated pile and a pile foundation made of the concrete are improved; moreover, the service life of the prefabricated pile and the pile foundation in a corrosive medium or environment is prolonged, and the safety of a building is ensured.

Description

technical field [0001] The invention relates to an anti-seismic and anti-crack prefabricated concrete square pile, which belongs to the field of building materials. Background technique [0002] The cross-sectional shapes of precast concrete piles in building foundation engineering mainly include precast concrete pipe piles with circular cross-sections and precast concrete square piles with square or rectangular cross-sections. Since the 1990s, with the standardization of precast concrete pipe piles and the continuous development of production and construction technology, pipe pile products have been widely recognized in foundation engineering, and pipe pile products have their significant advantages in actual engineering, but Insufficient performance in the following aspects: ①The pipe pile has an outer circular structure, which is not easy to tie and fix during transportation; ②Due to the certain ellipticity of the pipe pile body, accidents of pile body crushing are prone ...

AI Technical Summary

Problems solved by technology

Since the 1990s, with the standardization of precast concrete pipe piles and the continuous development of production and construction technology, pipe pile products have been widely recognized in foundation engineering, and pipe pile products have their significant advantages in actual engineering, but Insufficient performance in the following aspects: ①The pipe pile has an outer circular structure, which is not easy to tie and fix during transportation; ②Due to the certain ellipticity of the pipe pile body, accidents of pile body crushing are prone to occur when the pile is used for hugging construction; ③ After the construction of the pipe pile on the soft soil foundation, the pile position is prone to inclination when the foundation pit is excavated; ④ The cap of the pipe pile foundation is larger than that of the square pile, and the foundation cost is higher.

[0003] Compared with cast-in-place concrete, the research on corrosion resistance and durability of precast concrete and the development of related technologies are seriously insufficient

In 2006, a study conducted by Zhongshan Sanhe Building Materials Co., Ltd., Shenzhen Graduate School of Tsinghua University, and the Institute of Materials Engineering of Tongji University concluded that currently, the widely used prestressed high-strength high-strength Concrete piles have low durability and are not suitable for pile foundation projects that require frost resistance, chloride ion penetration resistance, and sulfate corrosion under dry-wet cycle conditions.

Its advantage is that the properties of the obtained square piles mixed with silica fume and their concrete can reach and exceed those of the original square piles and their concrete without silica fume, and can improve the alkalinity of concrete, which is beneficial to the alkalinity of steel bars. Protection, its disadvantage is that it does not meet the relevant norms and standards for concrete seismic resistance. There are various concrete additives on the market, but the effect is not very significant, and it cannot solve the cracking phenomenon of concrete under load.

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