A coordinatively deformable connecting device for deep-water composite foundations

Abstract

The invention provides a connecting device capable of being used for deepwater combination foundations and coordinating deformation. According to the connecting device, a steel tube sleeve (3) is arranged in a preformed hole in the center of an open caisson bottom plate (2), a rigid base plate (7) is arranged on the lower portion of the steel tube sleeve (3), a shear key (8) is arranged in the steel tube sleeve (3), a flexible cushion layer (6) is arranged on the lower portion of the rigid base plate (7), a rigid limit plate (5) is arranged on the lower portion of the flexible cushion layer (6), a pile foundation (1) penetrates through the rigid limit plate (5), the flexible cushion layer (6) capable of stretching and retracting for deformation, the rigid base plate (7) and the shear key (8), and pile sealing concrete (9) is located on the upper portion of the open caisson bottom plate (2) and the upper portion of the pile foundation (1). By means of the connecting device, connection between an open caisson (caisson) foundation and the pile foundation can be achieved, relative positions of the open caisson (caisson) foundation and the pile foundation can also be changed according to the loading conditions on the upper portion; as a result, the foundations and a soil body can deform in a coordinating mode, the supporting rigidity of the soil body is changed, the bearing capacity of the soil body at the bottoms of the foundations is given to full play, the sizes of the foundations are reduced, and construction cost is lowered.

Description

technical field [0001] The invention relates to the field of civil engineering bridge construction, relates to bridge foundation technology, in particular to a coordinated deformation connecting device for deep water composite foundations. Background technique [0002] At present, my country's bridge construction industry is developing rapidly and has achieved world-renowned achievements. A number of world-class high-level super-large bridges have been built one after another, such as the Sutong Yangtze River Bridge, the Hangzhou Bay Bridge, and the Hong Kong-Zhuhai-Macao Sea-Crossing Bridge. my country's bridge construction level has been at the forefront of the world, but with the development of bridge construction to larger spans and deeper waters, new technical problems have emerged: traditional single foundation types, such as single caissons, single caissons, It is difficult for pile foundations to meet the bearing capacity and deformation requirements of long-span deep...

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Problems solved by technology

[0005] Technical solution: The present invention aims at the shortcomings of the high cost of large-span deep-water bridge foundations in my country and the inability to give full play to the bearing capacity of the soil, and invents a coordinatively deformable connecting device for deep-water composite foundations, which can be used for sinking The joint part of the combined foundation of the well (caisson) and piles can make the soil at the bottom of the caisson fully exert its bearing capacity, reduce the size of the foundation, and achieve the purpose of saving investment

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