Anticorrosive preformed pile and manufacturing and constructing method thereof

Abstract

The invention discloses an anticorrosive preformed pile which is characterized in that pile links 0.5-25 cm greater than a pile body in diameter are arranged on the pile body of the preformed pile at intervals of 0.3 4 m; and the pile body is coated with waterproof asphalt, and 0.5-25cm thick sand or gravel is coated outside the waterproof asphalt. A manufacturing and constructing method of the anticorrosive preformed pile comprises the following steps of: binding a steel reinforcement cage and putting the steel reinforcement cage into a preformed pile template with the pile links, pouring concrete; after the desired strength of the concrete is achieved, spraying the waterproof asphalt to the pile body or lifting and putting the pile body into a holt melt asphalt tank to be soaked in the waterproof asphalt; lifting the pile body by a pile machine and standing the pile body in a pile position; heaping sand or gravel on the pile position; and piling or pressing the pile body into the soil so that the pile tip and the pile links on the pile body squeeze away the soil layer and the sand or the gravel, and then the soil, the sand or the gravel are conveniently filled around of the pile. The anticorrosive preformed pile and the steel reinforcement are prevented from being corroded by underground water; the bearing capability of the pile is improved, the drainage of stressed water in the soil layer is accelerated, the solidification of the soil around the pile is sped up, and the frictional force of the soil around the pile is improved; and the anticorrosive preformed pile is suitable for building foundation engineering in newly developed saline-alkali regions or new coastal reclamation regions in China.

Description

technical field [0001] The invention relates to the field of building foundations, in particular to an anti-corrosion prefabricated pile and a manufacturing and construction method thereof. Background technique [0002] With the continuous expansion of the scale of urban construction in our country, the land for urban construction is becoming increasingly scarce, and many cities have to develop and utilize the barren saline-alkali land, or reclaim land from the sea. In the large saline-alkali land in my country's coastal areas, the groundwater contains SO 4 2- , CO 2 - 、HCO 3 , CL- is corrosive to concrete and steel bars. For example, 8 groundwater samples from the thermal power project site of China Resources Bohai New District, Cangzhou, Hebei, were tested by the Hebei Provincial Water Environment Monitoring Experimental Center, and the evaluation report (No. - 142521.1-51052.3, including SO 4 2- 13038.4-6047.1, strong corrosion to concrete structures, weak corrosi...

AI Technical Summary

Problems solved by technology

This measure is more economical than applying polyurethane or polyurea with a unit price of 100-250 yuan per square meter on the outside of prefabricated piles or pipe piles, but it can only delay the degree of corrosion of concrete structures and steel bars and prolong the time of corrosion. Corrosion of concrete structures and steel bars cannot be prevented

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