Temporary cofferdam and construction method for repairing concrete flood wall of urban tidal river

Abstract

The invention discloses a temporary cofferdam applied to maintenance of an urban tidal river concrete anti-flood wall and a construction method thereof. The temporary cofferdam is composed of an arched pipe bag, side reinforced belts, annular reinforced belts, impervious blankets, end reinforced and impervious curtains and anchoring components. A plurality of grouting openings and sealing plugs for water filling and draining are arranged on the upper portions of the facing-water sides of the pipe bags, the walls of the water facing sides and the land sides of the pipe bags are integrally combined with the high-strength reinforced belts to form the side reinforced belts, and the impervious blankets outwards extend out of the side reinforced belts on the water facing sides and are pressed by a row of small sand bags; the two ends of each pipe bag are provided with the annular reinforced belts which are integrated with the side reinforced belts, and the annular reinforced belts extend outwards to form the horn-shaped end reinforced impervious curtains to be connected with an original wall and anchored and sealed by the anchoring components; the end reinforced and impervious curtains and the impervious blankets are integrated to form a sealed water retaining structure with the arched pipe bags. The temporary cofferdam has the advantages of being simple in structure, safe, reliable, convenient to transport and store, quick to construct, capable of being repeatedly used, friendly to the environment, and the like.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a temporary cofferdam for repairing concrete flood walls of urban tidal rivers and a construction method. Background technique [0002] The river network in the coastal estuary area of ​​my country is densely covered, and the number and length of the embankment and flood control walls used for flood control on both sides of the river are huge. It is completed within a tidal cycle, so a temporary water-retaining structure is required to enclose the gap in the maintenance section during the maintenance period, that is, a temporary cofferdam needs to be constructed. [0003] Before the present invention, there were mainly three types of temporary cofferdams used for maintenance and reinforcement of concrete flood walls in tidal rivers in coastal cities: bagged earth embankments, large brick-laying structures and assembled temporary cofferdams. The bagged earth ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiency that the above-mentioned existing temporary cofferdams cannot meet the requirements of temporary water retaining for the maintenance and reinforcement of concrete flood walls of tidal rivers in coastal cities, and propose a kind of arched anchorage type water-filled pipe bag temporary cofferdam and its construction method. The structure of the cofferdam is reasonable, safe and stable, and the connection is closed and reliable. It does not affect road traffic and damage the urban environment. It is easy to install and disassemble and can be reused.

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