Steel pipe pile cofferdam for bridge deepwater foundation and construction method thereof

Abstract

The invention discloses a steel pipe pile cofferdam for a bridge deepwater foundation and relates to the technical field of cofferdam building construction. The steel pipe pile cofferdam comprises bottom concrete, lock catch steel pipe piles and reinforced concrete piles, wherein pile foundations penetrating into bed rock are arranged below the bottom concrete; each of the lock catch steel pipe piles comprises a pile body and a lock catch arranged on the wall surface of the pile body; the lock catch steel pipe piles surround the edge of the bottom concrete through connection of the lock catches; a pile head penetrating into the surface of the bed rock extends to the lower end of the corresponding pile body integrally; inner supports are further arranged in the lock catch steel pipe piles and comprise H-shaped steel circuit purlins and support rods; the support rods are horizontally arranged between the lock catch steel pipe piles on the opposite sides; the concrete piles extend downwards to the interior of the bed rock from the interior of the lock catch steel pipe piles; and each of the reinforced concrete piles comprises a concrete substrate and a steel reinforcement cage in theconcrete substrate. The invention further provides a construction method of the steel pipe pile cofferdam for the bridge deepwater foundation. The steel pipe pile cofferdam has the advantages of beingsimple in technology, convenient in construction, low in cost, high in safety and supporting property, and adapted to complicated riverbed conditions.

Description

technical field [0001] The invention relates to the technical field of cofferdam construction, in particular to a steel pipe pile cofferdam used for bridge deep water foundations and a construction method thereof. Background technique [0002] In some rivers in my country, especially the Ganjiang River, the geological and hydrological conditions are complex and varied. Most of the riverbeds are exposed bedrock, and the cap platform is 15 meters away from the existing Beijing-Kowloon Line. There is no silt in the traditional river bed for auxiliary support of pile sinking so as to facilitate construction after steel pipe piles are sunk in place. In the process of bridge construction, if the traditional double-wall steel cofferdam is used for construction, there will be insufficient space due to the proximity of the existing line. At the same time, the exposed bedrock will prevent the general cofferdam from sinking into place, and the steel pipe piles cannot guarantee the depth...

AI Technical Summary

Problems solved by technology

In the process of bridge construction, if the traditional double-wall steel cofferdam is used for construction, there will be insufficient space due to the proximity of the existing line. At the same time, the exposed bedrock will prevent the general cofferdam from sinking into place, and the steel pipe piles cannot guarantee the depth of penetration and overall rigidity.

However, if long Larsen steel sheet piles are used, their strength and tooth mouth closure cannot meet the construction requirements

At the same time, it is inconvenient to use tall machinery during the construction process

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