Ultra-high-performance concrete lattice reinforcement structure and method thereof for reinforcing masonry arch bridge

An ultra-high-performance, structural reinforcement technology, applied in arch bridges, bridge reinforcement, bridges, etc., to achieve the effect of improving overall stiffness, reducing loads, ensuring feasibility and construction efficiency

Inactive Publication Date: 2018-08-28
SHANXI PROVINCIAL RES INST OF COMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides an ultra-high-performance concrete lattice reinforcement structure and a method for reinforcing ma...

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  • Ultra-high-performance concrete lattice reinforcement structure and method thereof for reinforcing masonry arch bridge
  • Ultra-high-performance concrete lattice reinforcement structure and method thereof for reinforcing masonry arch bridge
  • Ultra-high-performance concrete lattice reinforcement structure and method thereof for reinforcing masonry arch bridge

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Embodiment 1

[0040] The ultra-high-performance concrete provided in this embodiment has excellent mechanical properties, the compressive strength is generally higher than 150MPa, the tensile strength is 8MPa, high toughness, and good durability, so that the ultra-high-performance concrete structure can still be used in overloaded environments or earthquakes. It has more excellent structural reliability. Moreover, the ultra-high performance concrete provided by this embodiment can greatly increase the service life of the structure and reduce the maintenance cost of the structure. The self-weight of the ultra-high performance concrete structure is about 1 / 3 to 1 / 2 of the traditional concrete structure, which significantly reduces the dead load effect. Therefore, the ultra-high performance concrete lattice reinforcement structure provided in this embodiment can effectively improve the reinforcement effect of masonry arch bridges.

[0041] figure 1 It is a schematic structural diagram of an ...

Embodiment 2

[0048] This embodiment provides a construction method for reinforcing masonry arch bridges using the ultra-high performance concrete lattice reinforcement structure provided in Embodiment 1. For a specific description of the ultra-high performance concrete lattice reinforcement structure, please refer to Embodiment 1, which is not mentioned here Let me repeat.

[0049] The construction method for reinforcing the masonry arch bridge provided by this embodiment includes: using the anchor shotcrete method and / or partial repair method to repair the original main arch ring for the first time; demolishing the arch building above the original main arch ring; removing all Describe the loose, peeling surface of the original main arch ring; wash and clean the original main arch ring; set a shear connector and a steel mesh on the original main arch ring, and the shear connector is a planting bar or an anchor rod; According to the balanced and symmetrical pouring method, the vertical and ...

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Abstract

The invention discloses an ultra-high-performance concrete lattice reinforcement structure and a method thereof for reinforcing a masonry arch bridge. The reinforcement structure comprises primary main arch rings, shear-resistant connectors and ultra-high-performance concrete longitudinal and transverse reinforcement strips. The original main arch rings are provided with the shear-resistant connectors, so that the ultra-high-performance concrete longitudinal and transverse reinforcement strips are integrated with the original main arch rings. The defects of low material strength, low bonding strength, poor durability and the like of ordinary concrete are compensated, so that reinforcement layers and the original main arch rings form an integrated part to jointly bear stress, and the application status of deviation between a reinforcement design calculation theory and the actual stress state is improved. The consumption amount of reinforcing materials is small, loads of the original main arch rings are reduced, and meanwhile ultra-high-performance concrete reinforcement layers share more live load effects. The long-term use performance and durability of a bridge are improved, the situations of cracking, damage, water seepage and other damage of concrete at the junctions of the reinforcement layers and the original main arch rings are avoided, and the lifetime cost of reinforcement of the masonry arch bridge is reduced.

Description

technical field [0001] The invention relates to the technical field of bridge reinforcement, in particular to an ultra-high-performance concrete lattice reinforcement structure and a method for reinforcing a masonry arch bridge. Background technique [0002] Most of the existing masonry arch bridges were built earlier, with lower load levels, and most of them have become dangerous old bridges. The existing masonry arch bridge reinforcement methods have certain limitations and defects. For example, the reinforced concrete composite arch ring reinforcement method increases the burden on components, and takes a long time for pouring and maintenance; the outsourcing steel plate reinforcement method consumes a large amount of steel and costs a lot. , poor corrosion resistance and fire resistance; changing the structural system method, the construction components have limitations for bridges with clearance requirements; the method of pasting carbon fiber cloth is poor in fire resi...

Claims

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Application Information

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IPC IPC(8): E01D22/00E01D4/00
CPCE01D22/00E01D4/00
Inventor 吴焱韩之江吴佳佳寇伟赵雷王琪王磊刘志华汪永强
Owner SHANXI PROVINCIAL RES INST OF COMM
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