Structure for preventing perforation and slurry leakage of cast-in-situ bored pile in water and construction method of structure

Abstract

The invention relates to a structure for preventing perforation and slurry leakage of a cast-in-situ bored pile in water and a construction method of the structure. An outer protecting cylinder is arranged at the periphery of a reinforced concrete cast-in-situ bored pile, an activated material slurry fixed protecting disk and an activated material slurry fixed protecting wall are arranged between the reinforced concrete cast-in-situ bored pile and the outer protecting cylinder from top to bottom, and a cement soil water stop protecting wall is arranged below the activated material slurry fixed protecting wall; the diameter of the activated material slurry fixed protecting disk is greater than that of the activated material slurry fixed protecting wall and that of the cement soil water stop protecting wall; a reinforcement cage positioning embedded part is arranged in the middle of the activated material slurry fixed protecting disk; the reinforced concrete cast-in-situ bored pile is formed by placing a reinforcement cage in an inner protecting cylinder and then pouring concrete. The protecting cylinder structure is high in stability, good in environmental protection and lower in cost, is capable of effectively preventing the perforation and the slurry leakage of the cast-in-situ bored pile in the water, and has better technical and economical benefits.

Description

technical field [0001] The invention relates to a protective structure and a construction method of bored cast-in-place piles, in particular to a structure and a construction method for preventing perforation and leakage of cast-in-place piles in water. The utility model belongs to the field of pile foundation engineering, and is suitable for pile foundation construction requiring prevention of perforated grout leakage and high-quality bored piles in water. Background technique [0002] Bored cast-in-situ pile is a pile made by forming a pile hole in the foundation soil by means of mechanical drilling, steel pipe extrusion or manual excavation, and placing a steel cage in it and pouring concrete. It is the most commonly used form in deep foundations. . Compared with other types of foundations, it is not restricted by conditions such as geography, geological conditions, climatic conditions, groundwater level, pile diameter, and pile body length. It has the advantages of high...

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Problems solved by technology

However, both methods have their own defects: the construction quality of the mud wall protection method cannot be guaranteed, and it is easy to shrink holes and collapse holes, and the perforation will leak slurry; the construction method of the full casing method is relatively expensive and cumbersome. Difficulty entering and withdrawing the cannula

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