Underwater bridge foundation construction method

Abstract

The invention relates to a basic construction process of a bridge in water, which comprises inserting steel plates on the periphery of a bearing cap base until the steel plates fold to form a cofferdam, arranging an inverted filter under the water in the cofferdam, arranging a vertical support of the steel structure, cyclically executing the following two steps until the water is pumped to the inverted filter, arranging the inner support of the steel structure, pumping water out from the cofferdam, and casting a concrete cushion after pumping water to the inverted filter. The scheme arranges the inverted filter in the cofferdam, guarantees the generation of quicksand in the process of pumping water under the situation that the bottom of the cofferdam is not be covered, simplifies the construction technology, makes the basic construction of the bridge which is carried out in the environment which is similar to dry land easy to be operated when casted the concrete cushion after pumping water, effectively shortens the construction period, saves the concrete for the back cover, and reduces construction cost, thereby realizing to provide construction environment for he bridge foundation in water such pier cap in safe, fast and low cost way.

Description

technical field [0001] The invention relates to bridge technology, in particular to a bridge foundation construction method in water. Background technique [0002] With the rapid development of bridge construction technology, large-scale bridges across rivers, rivers, lakes, seas and other waters have appeared, and many piers of these bridges are located in deep water areas. Moreover, for the sake of the beauty of the bridge, the elevation of the top surface of most deep-water bridge piers is designed below the normal water level of the water area, which requires the construction technology of deep-water mass concrete caps, that is, the construction of these mass concrete caps under deep water The bearing platform is carried out construction to realize. This involves the comprehensive influence of factors such as differences in geological conditions, changes in water flow and water level, and shipping. The selection of the type of large-volume water-retaining structure and ...

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Problems solved by technology

[0017] Construction method of concrete back cover of steel casing box: using steel casing box as water retaining structure, the amount of steel is large, and it is a one-time investment, which cannot be recycled, resulting in a great waste of resources, which is not conducive to saving resources; moreover, processing steel casing It takes a long time to install the container, which greatly delays the construction period; further, the uniformity and thickness of the concrete cannot be controlled when the underwater concrete is sealed, resulting in a large amount of concrete, which greatly increases the construction cost

[0018] Although the steel sheet pile cofferdam concrete bottom sealing construction method avoids the problems of large amount of steel used in the water retaining structure and long processing period caused by processing, it still uses the underwater concrete bottom sealing method, so There are still problems such as large amount of concrete, construction safety caused by concrete back cover, and long construction period.

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