UHPC board and concrete combined type frame slab bridge and construction method thereof

Abstract

The invention discloses a UHPC (Ultra High Performance Concrete) board and concrete combined type frame slab bridge and a construction method thereof, the structure part of the UHPC board and concrete combined type frame slab bridge comprises a plurality of groups of bridge piers arranged at equal intervals, cover beams are arranged on the bridge piers, UHPC board trusses are erected among the cover beams, concrete is poured on the UHPC board trusses, and the UHPC board trusses are connected with the cover beams through the concrete. The ends of the adjacent UHPC plate trusses are correspondingly provided with hogging moment area UHPC prefabricated slabs, and the two ends of each hogging moment area UHPC prefabricated slab are connected with concrete at the ends of the UHPC plate trusses on the two sides respectively. Compared with a cast-in-place common concrete structure, the UHPC board concrete combined continuous frame slab bridge designed by the invention is better in stress performance, better in durability, more convenient in construction process and lower in construction cost, has very remarkable advantages, and has relatively high applicability to construction of bridges in coastal splash zones.

Description

technical field [0001] The invention is applied to the technical field of structural engineering, in particular to a UHPC plate and concrete combined frame slab bridge and a construction method thereof. Background technique [0002] Steel bridges and steel-concrete composite bridges are not suitable for bridge construction in coastal areas due to outstanding durability problems, so bridges in coastal areas are mostly concrete bridges. However, the environmental conditions in the coastal splash zone are harsh and the working conditions are complex, so the construction and maintenance of concrete bridges in the coastal splash zone are seriously threatened, which is manifested in the following aspects: [0003] (1) In terms of mechanical performance: the bridge in the coastal wave splash area directly bears the impact of huge waves, and the excessive marine dynamic impact will even exceed the live load of the bridge, which will have an adverse effect on the structural force. Th...

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Problems solved by technology

[0003] (1) In terms of mechanical performance: the bridge in the coastal wave splash area directly bears the impact of huge waves, and the excessive marine dynamic impact will even exceed the live load of the bridge, which will have an adverse effect on the structural force. The crack resistance of the beam body Difficult to meet requirements

[0004] (2) In terms of durability: conventional concrete structures are prone to cracking under complex offshore conditions, and harmful substances in the marine environment will erode the cracked concrete structure, further accelerating the corrosion of internal steel bars, and the durability problem is worrying

[0005] (3) In terms of construction: the coastal bridge is located in a deep silt tidal flat area, it is difficult to erect supports, and the cast-in-place construction of the bridge superstructure is complicated, with high construction cost and long construction period

[0006] In summary, conventional concrete structures are difficult to meet the mechanical properties and durability requirements of bridges under complex environmental conditions in coastal splash zones. Therefore, it is necessary to propose a new type of bridge structure with reasonable stress, good crack resistance, and excellent durability. It is of great significance to promote the development and construction of bridges in the coastal splash zone

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