Lock catch steel pipe pile cofferdam applied under condition of water level change and construction method

Abstract

The invention discloses a lock catch steel pipe pile cofferdam applied under the condition of water level change, which is characterized in that the cofferdam is formed by encircling a plurality of first steel pipe piles (1), the adjacent first steel pipe piles (1) are connected with each other through lock catches (2), the tops of the first steel pipe piles (1) are connected with second steel pipe piles (4), and the second steel pipe piles (4) are connected with the second steel pipe piles (4) through lock catches (2). The adjacent second sections of steel pipe piles (4) are mutually connected through the lock catches (2), a gap between the bottom of the first section of steel pipe pile (1) and the guide hole is filled with a grouting gravel part (11), the grouting gravel part (11) is formed by gravel and solidified cement grout, and the upper portion of the grouting gravel part (11) is further filled with a yellow mud part (12); one or more inner supports are further arranged on the inner side of the steel pipe pile, and each inner support is composed of a steel enclosing purlin, an inner inclined support and an inner transverse support which are connected with one another. Meanwhile, the invention further discloses a construction method of the steel pipe pile cofferdam.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a locking steel pipe pile cofferdam applied under the condition of water level change, and also discloses a construction method of the cofferdam. Background technique [0002] Deep-water foundation construction is the focus and difficulty of deep-water bridge construction. my country's deep-water foundation construction methods and construction technologies are developing rapidly, and at the same time, the problems and challenges faced in foundation construction are also increasing. The construction method generally adopted in deep water foundation construction is to install cofferdams for excavation of foundation pits. The form of the cofferdam is determined by factors such as the thickness of the covering layer, the nature of the soil layer, the water depth and water level change, and the water flow velocity. [0003] When the covering layer is thick and the covering layer i...

AI Technical Summary

Problems solved by technology

For the above reasons, the traditional locking steel pipe pile cofferdam cannot be directly applied in the environment of water level changes and ultra-thick pebble overburden.

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