Multifunctional protective cylinder suitable for sludge bottom layer and construction method using protective cylinder

Abstract

The invention discloses a multifunctional protective cylinder suitable for a sludge bottom layer and a construction method using the protective cylinder. The multifunctional protective cylinder comprises a cylinder body which is in unclosed connection and provided with a gap, a water-jet cutter assembly arranged in the sidewall of the cylinder body, and a buckle assembly which is arranged on the sidewall of the cylinder body and covers the gap. The construction method comprises the steps of judging whether diameter change is required or not according to excavation depth, then placing the protective cylinder in the sludge layer, pouring concrete into the protective cylinder after removing sludge from the interior of the protective cylinder, lifting the protective cylinder upwards through inverted-hook-like grooves by adopting a three-claw hook, and starting the water-jet cutter assembly to remove the sludge at the same time until pouring is finished. The protective cylinder can reduce the overall weight while maintaining stiffness. In addition, the gap is formed in the sidewall of the protective cylinder, and the buckle assembly is arranged to perform position-limiting connection onthe gap, so that the diameter of the protective cylinder can be controlled and the protective cylinder is suitable for more scenes. Moreover, the water-jet cutter assembly is arranged on the outer sidewall of the protective cylinder so as to reduce the difficulty of pulling out the protective cylinder from the sludge layer, so that the work efficiency of construction can be improved.

Description

technical field [0001] The invention belongs to the field of casings, and in particular relates to a multifunctional casing suitable for mud bottom layers and a construction method using the casing. Background technique [0002] In some harsh geological environments, the use of steel casings for wall protection will cause a series of problems, such as excavating piles in the mud layer, using steel casings, after the construction is completed, when the steel casings are taken out, due to the viscosity of the mud , will be closely attached to the outer wall of the steel casing, which will hinder the pulling out of the steel casing. At the same time, during the pulling out process, it will cause a large disturbance to the inner wall of the borehole, so there is a possibility of collapse; In the process of deep drilling, due to the limitation of the length of the steel casing, the length of the protective hole is limited, so it is not suitable for ultra-deep drilling. Contents...

AI Technical Summary

Problems solved by technology

[0002] In some harsh geological environments, the use of steel casings for wall protection will cause a series of problems, such as excavating piles in the mud layer, using steel casings, after the construction is completed, when the steel casings are taken out, due to the viscosity of the mud , will be closely attached to the outer wall of the steel casing, which will hinder the pulling out of the steel casing. At the same time, during the pulling out process, it will cause a large disturbance to the inner wall of the borehole, so there is a possibility of collapse; In the process of deep drilling, due to the limitation of the length of the steel casing, the length of the protective hole is limited, so it is not suitable for ultra-deep drilling

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