Soil borrowing device for extra-large open caisson and using method of soil borrowing device

Abstract

The invention discloses a soil borrowing device for an extra-large open caisson and a using method of the soil borrowing device. The soil borrowing device comprises a main steel pipe, N hydraulic oil cylinders, N supporting rods, N scrapers and a power head, wherein the main steel pipe comprises a bottom section steel pipe and a plurality of elongated section steel pipes for splicing and elongating; a bottom end of the bottom section steel pipe is fixedly provided with an annular clamping groove; a fixing ring is fixedly arranged on an upper outer circumferential surface; the N hydraulic oil cylinders are uniformly distributed at the periphery of the bottom section steel pipe, and the upper ends of the oil cylinders are fixed with the fixing ring respectively; the upper ends of the N supporting rods are hinged with the lower ends of the hydraulic oil cylinders; two ends of each scraper are hinged with the supporting rods and the annular clamping groove respectively; and the power head is fixed with an upper extending end of the main steel pipe. When the soil borrowing device is in a non-operating state, the scrapers are tightened in a suspender shape and have small diameters, a smaller hole is needed to be formed on the top of the open caisson, and integrity of the open caisson can be improved; and when the soil borrowing device is in an operating state, the scrapers are opened in an umbrella shape, the pulping area is enlarged, and the soil borrowing efficiency is improved.

Description

technical field [0001] The invention relates to a construction device for a super-large caisson, in particular to a soil-taking device for a super-large caisson and a use method thereof. Background technique [0002] With the rapid development of bridge construction in my country towards long-span and deep-water areas, super-large caissons are increasingly used in deep-water bridge foundations due to their high stiffness. [0003] At present, during the sinking construction of super-large caissons, there are two conventional methods of soil extraction, one is soil extraction by grab bucket, and the other is soil extraction by pumping water. During the sinking process of the caisson in the impermeable layer, if the method of pumping water and soil is adopted, the pressure on the caisson wall will be strong. Therefore, the wall thickness of the caisson must be very thick, and the amount of materials used will increase greatly, which is poor in economy. However, if the convent...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the problem that the super large caisson sinking construction is difficult and economical

Images