Anchored Suspension Bridge with Inclined Axis Tower

Abstract

The invention discloses an inner anchoring suspension bridge with oblique axis cable bent towers. The inner anchoring suspension bridge mainly consists of a main cable, suspension cables, oblique axis cable bent towers, horizontal bars and a stiffening girder, wherein the suspension cables are uniformly arranged between the main cable and the stiffening girder; an oblique axis cable bent tower foundation is cast at the bottom of each of the oblique axis cable bent towers; a steering block II is arranged at the bottom of each of the oblique axis cable bent tower foundations; a cable saddle is arranged at the top of each of the oblique axis cable bent towers; one end of each of the horizontal bars is connected with the corresponding oblique axis cable bent tower, and each steering block I is arranged at the other end of the corresponding horizontal bar; and the end part of the main cable sequentially goes around the cable saddles, the steering blocks I, the steering blocks II, and is finally anchored on the stiffening girder. According to the inner anchoring suspension bridge with the oblique axis cable bent towers disclosed by the invention, anchorages which are large in size are not used, and the calculating length of the main cable for connecting the anchorages is reduced, so that the stress and the amplitude of the main cable are reduced under the effect of a permanent load; the main cable goes around the oblique axis cable bent tower foundations, so that the pressure of the cable bent towers to bases is reduced; and the main cable is anchored on the stiffening girder, and axial force is provided by the stiffening girder for balancing part of horizontal component force of the main cable, so that the aerodynamic performance of the suspension bridge is improved, the horizontal thrust of the foundations is reduced, and investment is reduced.

Description

technical field [0001] The invention belongs to a suspension bridge, in particular to a suspension bridge anchored in a tower with an inclined axis. Background technique [0002] The suspension bridge structure has the characteristics of good mechanical performance, large spanning capacity, light and beautiful appearance, strong earthquake resistance, various structural forms, and good adaptability to terrain. It is often used as a Preferred bridge type. Therefore, people have also designed various suspension bridge structures. For example, Chinese patent application No. 201510012845.7 discloses a suspension bridge with high torsional rigidity, including a main girder, a cable tower, a main cable and a suspender. Both sides are used to suspend the main girder through the main cable, so that the main cable, suspender and main girder form a structure with a triangular cross-section in space; it uses the stability of the triangle to form a structure similar to a triangular bo...

AI Technical Summary

Problems solved by technology

[0003] However, in general conventional ground-anchored suspension bridges, it is necessary to build bulky anchors to anchor the main cable, which results in a very large amount of foundation work for the anchorage structure in places with poor geological conditions, which often becomes a difficult point in the project; The anchorage and anchorage foundation of the anchor suspension bridge occupy a considerable part of the project cost, and become an important aspect affecting the structural economy of the suspension bridge; in urban areas or tourist areas, the construction of bulky anchorages will also have a negative impact on the aesthetics of the environment

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