Three-tower suspension bridge with seism-isolating foundations
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A basic and shock-isolation technology, applied in the field of three-tower suspension bridges, to achieve the effects of easy inspection and maintenance, simple implementation schemes, and bridge safety
Active Publication Date: 2014-06-11
CCCC HIGHWAY CONSULTANTS +1
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[0004] Studies have shown that the self-stiffness and damping of the bridge structure, as well as the cable tower and additional stiffness or (and) additional damping methods cannot effectively resist the huge ground motion
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[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0025] Such as figure 1 As shown, the three-tower suspension bridge provided by the present invention is provided with a seismic isolation foundation including: middle tower 1; side towers 2 distributed on both sides of middle tower 1; anchorages 6 distributed on the outside of side towers 2; connecting anchorages 6, side towers 2 and the main beam 3 of the middle tower 1; the main cable 4 spanning the side tower 2 and the middle tower 1 and anchored to the anchorage 6; the sling 5 connecting the main cable 4 and the main beam 3; To fix the middle tower foundation 7 of the middle tower 1; the side tower foundation 8 used to fix the side tower 2 under the side tower 2; the side tower foundation vibration isolation cushion ...
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Abstract
The invention discloses a three-tower suspension bridge with seism-isolating foundations. The bridge comprises a middle tower, side towers, girders, main cables, suspension cables, anchorages, a middle tower foundation, side tower foundations, side tower foundation seism-isolating cushions, seism-reducing-and-isolating energy dissipation devices, intelligent video monitoring technology devices, foundations, added stiffness and added damp. The bridge can resist the action of automobiles, temperature, strong wind, frequent seism and other static and dynamic loads by means of inherent rigidity and damp, the added stiffness and the added damp, so the safety of the bridge is ensured. When a rare great earthquake takes place, the side tower foundation seism-isolating cushions and the seism-reducing-and-isolating energy dissipation devices can dissipate the dynamic energy of the earthquake because of shear deformation, thus ensuring the safety of the bridge. The side tower foundation seism-isolating cushion is sand, sand and gravel mixture or plain concrete which is 400mm to 1000mm thick, and the seism-reducing-and-isolating energy dissipation devices and the intelligent monitoring devices are arranged in the side tower foundation seism-isolating cushions. The three-tower suspension bridge can effectively isolate the seismic dynamic energy generated by the rare great earthquake, the implementation scheme is simple, safe and economical, and the three-tower suspension bridge is convenient to check and maintain.
Description
technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a three-tower suspension bridge provided with a seismic isolation foundation. Background technique [0002] The suspension bridge is a flexible cable bridge structure whose main load-bearing component is tensioned by the main cable. The self-weight of the main girder, the dead load of the second phase, and the live load of the vehicle are all transmitted to the main cable through the sling, and finally the main cable transmits all the loads from the main tower and anchorage to the foundation. As the span increases, the double-tower suspension bridge needs to build huge anchorages, which reduces the economy, especially for bridges with thick covering layers and deep bedrock burial. Compared with the single-span suspension bridge, the three-tower suspension bridge can significantly reduce the tension of the main cable and the scale of the anchorage. Especially when the ...
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