Oblate ellipsoid-shaped bridge sunk shaft foundation favorable for changing course of ship colliding with bridge

Abstract

The invention discloses an oblate ellipsoid-shaped bridge sunk shaft foundation favorable for changing the course of a ship colliding with a bridge. The oblate ellipsoid-shaped bridge sunk shaft foundation comprises a shaft wall, short-edge partitions, long-edge partitions, arched side shaft holes and rectangular central shaft holes, wherein the shaft wall, the long-edge partitions and the short-edge partitions are connected into a whole, and the arched side shaft holes and the rectangular central shaft holes are distributed inside, so that a lattice-type oblate ellipsoid-shaped section sunk shaft foundation is formed. According to the oblate ellipsoid-shaped bridge sunk shaft foundation favorable for changing the course of a ship colliding with a bridge, the water-blocking effect can be effectively reduced; the anti-colliding performance of the structure is improved; and damage to ships is alleviated, so that the oblate ellipsoid-shaped bridge sunk shaft foundation has wide application prospect in river-crossing and offshore bridge construction.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a flat oval bridge caisson foundation which is beneficial for changing the course of a ship hitting a bridge. Background technique [0002] With the rapid development of my country's cross-river and sea-crossing bridge construction, caisson foundations have also been used more and more widely. For example, the Nanjing Yangtze River Bridge, Jiangyin Yangtze River Bridge, and Ma'anshan Yangtze River Bridge all use different types of caisson foundations. The caisson is a rigid deep foundation, which does not require additional enclosures during construction. The caisson foundation has the characteristics of large buried depth and good overall stability, and can withstand large vertical and horizontal loads, especially for deep water Base. The construction process of the caisson does not require very complicated mechanical equipment, the construction technology is simple, ...

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Problems solved by technology

[0003] In the prior art, caisson foundations of large bridges mainly adopt rectangular, round-end, circular and rectangular rounded section caissons. When applied to river or offshore bridge projects with navigation requirements, due to the size The size of the caisson foundation is so huge that it has a great effect on blocking the flow of water. The four sides of the rectangular section caisson are straight lines. When the ship hits, the direction of the ship cannot be changed, which is not conducive to the structure's anti-collision and the protection of the hull. The structure is stressed, and the water blocking effect of the round-ended or circular-section caisson is better than that of the rectangular caisson, and because of the curve design around the round-ended or circular-section caisson, it has the effect of changing the direction of the ship when the ship hits. It is beneficial to structure anti-collision and protection of the hull. However, due to the force and structural requirements of the bridge structure, the layout of the main piers in the direction of the bridge and the direction of the bridge is completely different, resulting in the foundation of the caisson in the direction of the bridge and the direction of the bridge. There is a large difference in the size of the caisson in the direction of the long side. If a caisson with a circular section is used, the only way to increase the size of the caisson is to increase the project scale to meet the needs of the long side direction, but the size of the short side is too much wasted, which will inevitably cause great damage. It is wasteful, and its arc radius is relatively large, so the effect of changing the course of the ship hitting the bridge is not obvious

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