a splicing bridge

Abstract

The invention discloses a spliced ​​bridge. The spliced ​​bridge includes an assembled prestressed concrete split small box girder bridge, an assembled concrete T girder bridge and a cast-in-place connecting plate, and the assembled prestressed concrete split small box girder bridge is set on the outside of the assembled concrete T girder bridge. The cast-in-place connecting plate is located in the middle of the assembled concrete T-beam bridge and the assembled prestressed concrete split small box girder bridge. The invention has the following advantages: (1) The new prestressed concrete split small box girder has a strong bearing capacity, and the building height is smaller than the original fabricated concrete T-beam bridge, which reduces the design difficulty; (2) The structure of the cast-in-place connecting plate is simple, The connection is reliable, the construction is convenient, and the cost is reduced.

Description

technical field [0001] The invention belongs to the field of bridges, in particular to a spliced ​​bridge. The bridge is suitable for general highway bridges, especially for expressway reconstruction and expansion projects, and is suitable for widening and reconstruction of highway multi-beam prestressed concrete T-beam bridges. Background technique [0002] In recent years, highway reconstruction and expansion projects are increasing day by day. Most of them are widened directly on the basis of the original roadbed and bridges. Bridge splicing is the key and difficult point in highway reconstruction and expansion projects. The bridges on the original expressway are generally designed according to the original standards, and the proportion of prefabricated concrete T-beams is relatively high, and the span is usually 20-40m. [0003] In order to ensure the integrity of the bridge after widening, the current highway bridge widening is based on the basic principle of widening ...

AI Technical Summary

Problems solved by technology

In order to meet the drainage requirements, the road bridge is set with a 2% transverse slope. If the new width part adopts the same building height as the original bridge, the bridge headroom will often be reduced by 15-16cm after the bridge is widened. If the original bridge design headroom is insufficient, the widened Afterwards, it may lead to flood control standards or the clearance of traffic under the bridge not meeting the specification requirements

If the girder height of the newly expanded part is reduced, since the bridge at the newly built part after widening is often under the heavy load of large trucks, the design of the bearing capacity will have high design difficulties, which will be detrimental to the safety of the structure and difficult to meet the safety requirements

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