CFRP plate lifting bridge with support

Abstract

The CFRP plate lifting bridge with the supports comprises a main beam, bridge abutments, bridge towers and lifting devices, the two ends of the main beam are supported on the bridge abutments, and the middle of the main beam is not directly supported by the bridge towers; the lifting device is composed of a first winding device, a second winding device, a first roll shaft and a CFRP plate strip, the first winding device and the second winding device are symmetrically installed at the two ends of the main beam relative to the bridge tower, the first roll shaft is installed at the top of the bridge tower, the CFRP plate strip bypasses the first roll shaft located at the top of the bridge tower, and the two ends of the CFRP plate strip are fixed to the first winding device and the second winding device respectively; in the natural state, the two ends of the main beam are supported by the bridge abutments, and the middle of the main beam is supported by the bridge towers through the CFRP plate strips. And in a lifting state, the main beam is supported by the bridge tower through the CFRP plate strip. Lifting is conducted through the winding equipment and the CFRP plate strip traction main beam in the lifting device, the structural design is reasonable, safety is high, and the operation efficiency of urban roads or inland river traffic is improved while the original bridge structural form is kept.

Description

Technical field [0001] The present invention relates to the technical field of bridge construction, in particular to a liftable bridge, specifically to a CFRP plate belt support lifting bridge. Background [0002] With the acceleration of the modernization process, the increasingly close exchanges between cities, and the congestion of road traffic or inland traffic, how to alleviate the increasingly tense traffic pressure has become a key issue that needs to be considered at present. The infrastructure construction industry is the direction of China's vigorous development for decades, and the construction of bridge structures has accelerated the exchanges between different cities to a certain extent and improved people's living standards. According to the structural system, the bridge structure can be divided into girder bridge, arch bridge, cable-stayed bridge, suspension bridge and combination girder bridge. Further subdivided, the bridge of each structural system can be divid...

AI Technical Summary

Problems solved by technology

[0003] Once the construction of the bridge structure is completed, the clearance height under the bridge will be fixed, and its shape cannot be changed. It cannot be adjusted according to the current changes in the flow of vehicles, ships and people.

For example, pedestrian bridges in urban roads, due to the limited clearance height under the bridge, when large trucks or other special vehicles need to pass, the clearance height of the pedestrian bridge is limited, so these vehicles can only choose to bypass the way to pass, which is undoubtedly Increased transportation costs

[0004] At present, steel strands are mostly used in bridge structures to provide prestressed tension. The corrosion problem of traditional steel strands or traction ropes in natural environments is becoming more and more serious, which will greatly affect the bearing capacity and durability of bridge structures. Secondly, steel strands The self-weight is relatively large, and its self-weight stress will account for most of the allowable stress, which will reduce the load-bearing efficiency

In addition, with the increase of the structure's self-weight, the cost of the structure will also be increased, and the construction difficulty will be increased.

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