Top film water-retaining method for underwater canal lining overhaul

Abstract

The invention relates to a top film water-retaining method for underwater canal lining overhaul. The top film water-retaining method comprises the following construction process steps: additionally installing a sealing layer on an edge needing to be sealed and a downstream face of a flexible waterproof film respectively, and additionally installing a counter weight on an upstream face; sinking downwards the downstream face of the flexible waterproof film into water, laying the flexible waterproof film on the surface of a canal lining in an area to be overhauled, and exposing the unsealed edge of the flexible waterproof film above the water level of water edge. The waterproof film in the top film water-retaining method disclosed by the invention is low in investment, simple in structure, environment-friendly in material selection, good in water-stopping effect, low in additional load, free from damages to the canal lining, convenient and fast to transport, install and transfer in water, capable of being supported by a floating crane, a movable maintenance cabin and a maintenance gallery, and the like to provide a flexible working space for lining maintenance on the provided working base surface, and also capable of being used as a rush emergency water-retaining curtain for preventing a slide area from expansion.

Description

technical field [0001] The invention relates to a water retaining method, in particular to a roof membrane water retaining method for underwater maintenance of channel lining, and belongs to the technical field of water conservancy engineering. Background technique [0002] Water diversion project is an important infrastructure to optimize the allocation of water resources across regions. Concrete-lined open channels have significant cost advantages and are widely used in engineering. If channel lining diseases such as cracks, erosion, waterproof failure, and landslides are not treated in time, serious Threats to the safety of water delivery in the project, for this reason, large-scale projects often carry out maintenance during the water supply period. Economically and quickly providing the working base is the key technology to realize the maintenance of lining during the water flow period. At present, the common water retaining schemes such as steel sheet pile cofferdam, e...

AI Technical Summary

Problems solved by technology

The economical and quick provision of the working base is the key technology to realize the maintenance of the lining during the water flow period. At present, the common water retaining schemes such as steel sheet pile cofferdam, earth-rock cofferdam, and caisson cofferdam not only have high cost and long construction period, but also generally cannot Provide a base for channel operations across both sides of the river, and at the same time may damage the lining of the occupied area

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