Double-protective-cylinder cast-in-situ bored pile used for highly-corrosive salty soil and construction method of double-protective-cylinder cast-in-situ bored pile

Abstract

The invention belongs to the field of civil engineering, and particularly relates to a double-protective-cylinder cast-in-situ bored pile used for highly-corrosive salty soil and a construction method of the double-protective-cylinder cast-in-situ bored pile. The double-protective-cylinder cast-in-situ bored pile used for the highly-corrosive salty soil comprises an outer protective cylinder (7) and an inner protective cylinder (1), wherein the inner protective cylinder (1) is located in the outer protective cylinder (7), the inner protective cylinder (1) is prefabricated concrete, and a reinforced framework is arranged in the concrete. The inner protective cylinder made of reinforced concrete can be prefabricated in a prefabricated component factory or on site, construction requirements for quality of protective cylinder concrete, the thickness of a protection layer and the like can be fully met, the inner protective cylinder can be conveniently spliced and placed in the right position, and accordingly much trouble can not be caused for construction.

Description

technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to a cast-in-place pile with double casings for strongly corrosive saline soil and a construction method thereof. Background technique [0002] There are different ranges of saline soil distribution in various countries and regions in the world. The saline soil in my country is mainly distributed in the low-lying plains or basins in the inland areas. Secondly, there is a considerable area of ​​distribution in coastal areas and some lake basins and depressions. The main characteristic of saline soil is that it contains more salt, and the saline soil in coastal areas is mainly composed of chloride salts (NaCl, CaCl 2 , MgCl 2 etc.), while in inland areas, there are mainly chlorine-containing salts (such as Qinghai area), and some are mainly sulfate-containing salts (Na 2 SO 4 etc.), and in most cases, chloride and sulfate exist at the same time. Data show that the co...

AI Technical Summary

Problems solved by technology

However, in the corrosive environment of high-concentration salt solution (especially in the dry-wet cycle section of the chloride-salt environment), the steel casing is easy to corrode, and the long-term protection effect cannot be achieved, a large amount of steel is wasted, and the economic benefits are not good.

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