Single and double-wall combined steel cofferdam construction method and its single and double-wall combined steel cofferdam

Abstract

The invention discloses a single-wall and double-wall combined steel cofferdam construction method and a single-wall and double-wall combined steel cofferdam. The single-wall and double-wall combined steel cofferdam construction method includes the following steps: firstly, assembling the bottom segment side plate of the cofferdam at an assembly field; then floating to the position of a pier; after that, injecting concrete into the foot blade and assembling the top segment of cofferdam and the top segment inclined strut; then positioning, cleaning up the pedestal, building a boring platform, installing a steel casing and stacking the sandbags sequentially; after that, injecting bottom seal concrete, and boring the pier for injection; finally, after the pier pedestal is constructed, pumping the water, cutting off the steel casing, chiseling off the laitance at the head of the pier and beginning the construction of a bearing board. The bottom segment side plate of the cofferdam is composed of circular external and internal wall panels, and the top segment side plate of the cofferdam is fixed on the circular external wall panel. The invention has the advantages of fast engineering speed, small construction difficulty and small cost investment, and the top segment side plate can be used repeatedly and is high in recovery rate; the invention overcomes the difficulties at the time of no bottoming concrete thickness; the circular sealing concrete between the bearing board and the cofferdam also has the effect of resisting water.

Description

technical field [0001] The invention relates to a bridge construction method, in particular to a single-double-wall combined steel cofferdam construction method and a single-double-wall combined steel cofferdam construction method using stacked sandbags and ring sealing methods for bridge engineering construction without the thickness of the bottom seal of the cofferdam weir. Background technique [0002] With the rapid development of my country's economy, the construction of transportation infrastructure has also been developed rapidly. At the same time, the number of bridges built on the rivers and lakes of our country has also increased. As everyone knows, building a bridge at first will build bridge piers in water, and building bridge piers will adopt cofferdams in water to drain the water therein before construction. [0003] As a temporary facility for bridge foundation construction, the cofferdam is mainly used as a waterproof device for foundation construction in wa...

AI Technical Summary

Problems solved by technology

[0004] When the geological conditions are not complicated, steel sheet pile cofferdams and double-wall steel cofferdams are usually used for construction. When the elevation is basically close, since there is basically no covering layer, it is not conducive to the insertion and fixing of steel sheet piles. Steel sheet pile cofferdams are used for construction. Steel sheet pile cofferdams cannot be sealed at the bottom and there is no way to block water; Low, fully adopting double-wall steel cofferdams is a waste of materials, and it is not very suitable for double-wall steel cofferdams from an economic point of view

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