Novel quickly-disassembled-and-assembled combined cofferdam with slope-retaining gallery for river channel

Abstract

The invention relates to a novel quickly-disassembled-and-assembled combined cofferdam with a slope-retaining gallery for a river channel. The effects that construction is convenient, safety is achieved, the anti-impact capacity is improved, and damage to a channel slope lining structure plate is repaired are effectively achieved. A cofferdam body is composed of an inlet section cofferdam body, amiddle section cofferdam body, a plug section cofferdam body and a pulling operation fixing device, the inlet section cofferdam body, the middle section cofferdam body and the plug section cofferdam body are connected together through connecting plates and flanges at the rear end of an inlet section, the front part of the inlet section cofferdam body is provided with the pulling operation fixing device composed of a ground anchor, a winch and a pulley block, the front lower part of the inlet section cofferdam body is provided with an adsorption fixing device, the ground anchor and the winch are arranged on a river bank of the inlet section cofferdam body, the pulley block is connected with the winch through a pulling rope, the ground anchor is connected with the front part of the inlet section cofferdam body through a pulling rope, the pulling operation fixing device is adopted to conduct pulling operation on the cofferdam, and the adsorption fixing device is utilized to fix the cofferdam. The damaged channel slope lining structure plate can be repaired without cutting off water, construction is convenient, safety is achieved, and the working efficiency is high.

Description

technical field [0001] The invention relates to restoration equipment for water conservancy projects, in particular to a novel river channel uphill corridor type quick disassembly and assembly combined cofferdam. Background technique [0002] In water conservancy projects of rivers, it is common to set up cofferdams when maintaining river channels. There is a river channel uphill corridor type quick disassembly and assembly cofferdam. Low arched structure, but in actual operation and use, it is found that due to structural problems, when the cofferdam is lowered to the designated position of the channel slope, due to the slope ratio of the river channel, the water enters both sides of the weir body of the inlet section and the top is all located Above the water surface, the top does not need to be closed, and the existing structure is a closed top. Since the top is closed in an arched shape, and the weir body of the entrance section has a certain length, it is inconvenient a...

AI Technical Summary

Problems solved by technology

[0002] In water conservancy projects of rivers, it is common to set up cofferdams when maintaining river channels. There is a river channel uphill corridor type quick disassembly and assembly cofferdam. Low arched structure, but in actual operation and use, it is found that due to structural problems, when the cofferdam is lowered to the designated position of the channel slope, due to the slope ratio of the river channel, the water enters both sides of the weir body of the inlet section and the top is all located Above the water surface, the top does not need to be closed, and the existing structure is a closed top. Since the top is closed in an arched shape, and the weir body of the entrance section has a certain length, it is inconvenient and even difficult for personnel, materials and small equipment to enter. Moreover, it also blocks the light in the cofferdam, which is not conducive to the operation in the cofferdam.

In particular, the weir body of the entrance section, the steel weir body of the middle section, and the lower part of the weir body of the plug section are equipped with non-liftable walking wheels. If it is too high, it will affect the passage of the cofferdam body, and the adaptability of the non-lifting walking wheels is poor; moreover, there are high-pressure water bladders installed at the lower ends of both sides of the weir body in the inlet section, the steel weir body in the middle section, and the weir body in the plugging section. The water filling is close to the lining board to close the water, but in actual use, it is found that it is difficult to connect the high-pressure water bladders of the sections with the high-pressure water bladders, and leakage is prone to occur at the joints. Under the dual pressure of body pressure and water pressure, it is very easy to burst and seep through suddenly, posing a threat to the safety of personnel and equipment working in the cofferdam; The outer steel frame, the assembly of the outer steel frame between the sections is troublesome and the water blocking affects the ability of the cofferdam to resist the impact of the water flow, and its use is not satisfactory. Improvement and innovation are imperative

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