Novel underwater bottom-sealing-free steel-concrete combined hanging box and laying method thereof

Abstract

The invention provides a novel underwater bottom-sealing-free steel-concrete combined hanging box. The novel underwater bottom-sealing-free steel-concrete combined hanging box comprises a bottom plate, side walls of the two sides of the bottom plate and a laying system on the bottom plate; pull rods are connected between the two side walls; the bottom plate is formed by on-site wet-joint splicingof a plurality of pre-fabricated bottom plate split bodies; the side walls are formed by on-site wet-joint splicing of a plurality of pre-fabricated side wall split bodies; the laying system compriseshanging assemblies which are installed on the bottom plate, and meanwhile pulling-pressing rods which are welded and fixed to brackets on protective casings are further disposed on the bottom plate.The hanging box provided by the invention adopts a combined structure and is formed into a whole through the cast-in-place method, bottom-sealing construction is not needed after laying is finished, the difficulty caused by underwater concrete bottom-sealing construction is effectively avoided, and the construction risk is small; and besides, the bottom plate and the side walls can be pre-fabricated at the same time during construction, and thus the construction period can be greatly shortened.

Description

technical field [0001] The invention belongs to the technical field of engineering construction, and in particular relates to a novel underwater bottomless steel-concrete combined suspension box and a lowering method thereof. Background technique [0002] The construction of traditional steel hanging boxes requires underwater concrete bottom sealing. If the bottom is not cleaned thoroughly and there is a lot of silt, the bottom sealing may not be successful and water leakage may occur. The steel casing of the pile foundation has a certain resistance to the flow of concrete during the concrete pouring process, which may cause defects such as uneven bottom cover and poor flatness of the bottom surface. When the water level in the hanging box rises at the high tide level, the water pressure increases accordingly, which has a great influence on the drop of the concrete, which may cause the concrete to be blocked in the conduit and cannot be lowered. In addition, due to the larg...

AI Technical Summary

Problems solved by technology

[0002] The construction of traditional steel hanging boxes requires underwater concrete bottom sealing. If the bottom is not cleaned thoroughly and there is a lot of silt, the bottom sealing may not be successful and water leakage will occur.

The steel casing of the pile foundation has a certain resistance to the flow of concrete during the concrete pouring process, which may cause defects such as uneven bottom sealing and poor flatness of the bottom surface

At high tide, the water level in the hanging box rises, and the water pressure increases, which has a great impact on the concrete falling, which may cause the concrete to be blocked in the conduit and cannot be lowered.

In addition, in the construction process of the back cover, due to the large area of ​​the back cover, it is usually necessary to arrange multiple conduits, the amount of pouring is large, the required construction time is long, and a lot of manpower and material resources are required.

Therefore, effective improvement is needed to solve the problems of high construction difficulty, high risk and high cost of the underwater concrete bottom sealing work of the steel hanging box in the prior art

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