Combination line-shaped bearing cable suspension bridge and construction method thereof

Abstract

The invention relates to a combination line-shaped bearing cable suspension bridge which is formed by a carriageway beam, a bridge tower, an anchoring, a bearing cable, and suspender cables. The bearing cable is formed by two main cables. A main cable displacement pulling rod of the two main cables is arranged between the bridge tower and an anchoring point. The main cables between the bridge tower and the displacement pulling rod are parallel to each other. The main cables between the displacement pulling rod and the anchoring point are in curve shapes at different intervals. The suspender cables are connected at two sides of the main cables and stiff girders at different skew angles. A main cable plane locating process exists in a construction method of the combination line-shaped bearing cable suspension bridge. According to the combination line-shaped bearing cable suspension bridge and the construction method of the combination line-shaped bearing cable suspension bridge, a dip angle of the suspender cables of the suspension bridge can be enlarged, an approximate triangle structure is formed by the carriageway beam and a part of the suspender cables, and stability of the suspension bridge is strengthened.

Description

technical field [0001] The invention relates to a bridge structure and a construction method, in particular to a suspension bridge combined with linear load-bearing cables and a construction method thereof. Background technique [0002] A suspension bridge is a long-span bridge. Known suspension bridge structure is made of bridge pylon, anchorage, load-bearing cable, driveway beam and sling, load-bearing cable is vertical curve, two ends are fixed on the anchorage, is connected load-bearing cable and driveway beam by sling. When this structure is used for long-span, the lateral stability is insufficient. Therefore, Yang Yongxin, Ge Yaojun, and Xiang Haifan mentioned in "Exploration for Improving the Wind-resistant Stability of Long-span Suspension Bridge" that the more economical and effective method is: center the main cable, form triangles with slings and stiffeners, such as figure 1 As shown, but due to the need to ensure traffic clearance, the main cable cannot be rigi...

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Problems solved by technology

When this structure is used for long-span, the lateral stability is insufficient. Therefore, Yang Yongxin, Ge Yaojun, and Xiang Haifan mentioned in "Exploration for Improving the Wind-resistant Stability of Long-span Suspension Bridge" that the more economical and effective method is: center the main cable, form triangles with slings and stiffeners, such as figure 1 As shown, but due to the need to ensure traffic clearance, the main cable cannot be rigidly connected to the bridge deck in the mid-span (that is, the central buckle)

[0003] Luo Xiheng, Xiao Rucheng, and Xiang Haifan provided a suspension bridge in which the mid-span load-bearing cables have a horizontal curve shape in the article "Analysis of the Main Cable Line Shape of Space Cable Suspension Bridge", such as figure 2 As shown, the load-bearing cable with two main cables separated and with a horizontal curve shape can provide lateral tension, thereby increasing lateral stability, but the inclination angle of the sling is small, and the lateral stability provided to the carriageway beam is small

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