Ground anchor type single-tower cable-stayed bridge structure

Abstract

The invention discloses a ground anchor type single-tower cable-stayed bridge structure. The ground anchor type single-tower cable-stayed bridge structure consists of a base, a cushion cap, a bridge tower, a main span stay cable, a main beam, an anchoring stay cable and an anchorage; the bridge tower is positioned on one side of the main beam and is balanced by the main span stay cable and the anchoring stay cable; one end of the main span stay cable is anchored on a main tower and the other end of the main span stay cable is anchored on the main beam; the main beam is hung by the main span stay cable; one end of the anchoring stay cable is anchored on the main tower and the other end of the anchoring stay cable is anchored on a ground anchor; the main beam on the side of the bridge tower is consolidated with the bridge tower or the cushion cap or the base, and the other side is supported on a transition pier through a support; and the bridge tower is positioned on one side of the main beam and is arranged vertically or in a retroverted way. By adoption of the structure, the conventional cable-stayed bridge span can be cancelled, so the project is economic; and the axial pressure of the main beam is transmitted to the base, the pile base inclining sidesway or front and back is adopted, the stability of a bank slope at the position of the bridge tower can be improved, and the bridge tower is arranged towards a canyon side, so that the span is reduced and the project scale is reduced.

Description

technical field [0001] The invention relates to the technical field of bridge structures, in particular to a ground-anchored single-tower cable-stayed bridge structure suitable for mountainous valleys. Background technique [0002] As my country's western development strategy continues to deepen, the transportation construction of the western provinces continues to advance. In the west, especially in the southwest, there are many mountains and valleys, and bridges play a very important role in its transportation construction. [0003] Cable-stayed bridges, also known as cable-stayed bridges, are composed of cable towers, main girders, and cable-stayed cables. has spread all over the world. Cable-stayed bridge, as a cable system, has a large spanning capacity, and its cables have self-anchoring characteristics without the need for a huge anchor rotation like a suspension bridge. In addition, it has good mechanical properties and economic indicators, so it has become the mos...

AI Technical Summary

Problems solved by technology

[0004] Traditional cable-stayed bridges have many advantages, but there are still some shortcomings in adapting to complex terrain such as mountains and canyons.

(1) The terrain of mountainous canyons is dangerous, or there are many gullies and deep valleys, or high mountains and steep slopes. If a traditional multi-span or single-pier cable-stayed bridge is built, it will lead to problems such as unusually high piers, difficult construction, poor safety, and poor economic efficiency; (2) Cable-stayed bridges without back cables or special-shaped cable-stayed bridges have large space requirements on the side without cable-stayed cables, which may be difficult to meet in mountainous canyon terrain, or may cause huge costs; (3) The stability of mountain slopes is poor, and other The horizontal tensile capacity and deformation capacity are relatively poor, and it is difficult to meet the safety requirements of traditional cable-stayed bridges; (4) when building bridges in mountainous and canyon terrain, the closest position to the mountains on both sides is generally selected, so the spanning capacity requirements of cable-stayed bridges (5) In the windy weather in mountainous areas, the increase of the span of the cable-stayed bridge will make its structural stiffness drop sharply. Vibration, wind-induced vibration and control of cable-stayed cables have always been the key issues faced by cable-stayed bridges.

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