Construction method for steel sheet pile cofferdam in high-flow-speed sandy gravel area

Abstract

The invention relates to a bridge bearing platform foundation construction technology, and particularly discloses a construction method for a steel sheet pile cofferdam in a high-flow-speed sandy gravel area. The construction method comprises the following steps that S1, a guide frame is positioned; S2, a streaming protection pile is inserted and driven; S3, steel sheet piles for positioning are inserted and driven; S4, a steel sheet pile cofferdam positioning guide frame is installed through a drilling platform; S5, other steel sheet piles are inserted and driven; S6, closing the steel sheet pile cofferdam; S7, enclosing purlins and inner supports are mounted; S8, bottom sealing concrete is poured; S9, a steel sheet pile cofferdam foundation pit is excavated; and S10, the steel sheet pile cofferdam is dismantled. The construction method for the steel sheet pile cofferdam in the high-flow-speed sandy gravel area is easy to operate, the construction process is safe and reliable, and the construction cost is low.

Description

Technical field [0001] The present invention relates to a bridge bearing base construction technique, and in particular, to a steel sheet of steel sheets in a large flow rate sandblast region. Background technique [0002] Steel plate pile coffun is the most commonly used method of construction. Steel sheet piles are a type of steel with a lock, and the cross section has a straight shape, a groove shape, and a Z-shaped, a variety of size and interlocking forms. Common Lalsen, Rachel Wanner, etc. The steel plate pile coffer is a construction method with strong load carrying capacity, short construction period, good material recovery, and water-saving performance, can meet the requirements of structural security and green environmental protection, played in the field of my country's basic construction. Videior effects, especially in the bridge infrastructure construction. [0003] When the existing traditional steel plate piles are constructed in a large-flow rate sand pebble regio...

AI Technical Summary

Problems solved by technology

[0003] When the existing traditional steel sheet pile cofferdam is constructed in the high-velocity sand and pebble area, it is vulnerable to the impact of the torrent and sand and pebbles on the steel sheet pile on the water surface. The strength, rigidity and stability meet the requirements of the construction. Usually, multiple internal supports are added inside the steel sheet pile cofferdam to resist the impact of water flow and sand and pebbles. However, the above method also prolongs the construction period and increases the construction cost.

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