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Urban fabricated platform bridge stair adopting UHPC and implementation method thereof

An implementation method and an assembled technology, applied in the direction of bridges, bridge parts, bridge construction, etc., can solve the problems of self-heavy and high maintenance costs, and achieve the effects of short production cycle, short maintenance time, and favorable transportation and field operations.

Pending Publication Date: 2020-02-21
广州市市政工程机械施工有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The overpass staircase can solve the disadvantages of high maintenance cost of the existing prefabricated steel staircase and the self-heaviness of the prefabricated ordinary concrete staircase. At the same time, the prefabricated overpass staircase with the combination of beams and slabs has a reasonable structure and better stress

Method used

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  • Urban fabricated platform bridge stair adopting UHPC and implementation method thereof
  • Urban fabricated platform bridge stair adopting UHPC and implementation method thereof
  • Urban fabricated platform bridge stair adopting UHPC and implementation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] An urban prefabricated flyover staircase using UHPC includes a staircase unit; the staircase unit includes two side beams, at least one middle beam, step ladder treads, an upper platform and a lower platform. The two side beams are located on the left and right sides parallel to each other, the middle beam is located between the two side beams and parallel to the side beams, the step ladder pedal is located between the two side beams and above the center beam, the upper end of the step ladder pedal is the upper platform, and the step ladder pedal The lower end of the stair is the lower platform; the stair unit is integrally poured into a beam-slab structure through UHPC, the upper platform, the lower platform, the side beam and the middle beam are all provided with steel bars, and the step ladder treads are provided with steel mesh. After being assembled and bolted, the overpass stairs are subjected to external loads such as the self-weight of the structure and the crowd...

Embodiment approach

[0044] A method for implementing an urban prefabricated flyover staircase using UHPC, comprising the following steps:

[0045] (1) According to the size of the stair section of the real bridge, in the prefabricated factory, the formwork is supported, the reinforcement bars are bound, the reinforcement mesh of the step ladder treads is extended into the reinforcement frame of the side beam and the middle beam, and the stress steel bars of the side beam and the middle beam are connected with the upper and lower platforms. Effective anchoring, the same set of formwork is used for the ascending stairway and the descending stairway, the upper and descending stairways are prefabricated, and the materials are recycled, which meets the requirements of green construction.

[0046] (2) Pouring ultra-high performance concrete UHPC, so that the side beam, middle beam and step ladder treads are poured into an integral beam-slab structure.

[0047] (3) Maintenance of stair unit structure, s...

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Abstract

The invention relates to an urban fabricated platform bridge stair adopting UHPC, and belongs to the technical field of municipal engineering fabrication. The urban fabricated platform bridge stair adopting the UHPC comprises a stair unit; the stair unit comprises two side beams, at least one middle beam, step ladder pedals, an upper platform and a lower platform; the two side beams are located onthe left side and the right side in parallel, the middle beams are located between the two side beams and are parallel to the side beams, the step ladder pedals are located between the two side beamsand located over the middle beams, the upper platform is arranged at the upper ends of the step ladder pedals, and the lower platform is arranged at the lower ends of the step ladder pedals; and thestair unit is of a beam plate type structure which is overall poured through the UHPC, stressed steel bars are arranged in the upper platform, the lower platform, the side beams and the middle beams,and steel bar nets are arranged in the step ladder pedals. The invention further relates to an implementation method of the urban fabricated platform bridge stair adopting the UHPC. The problems thatthe maintenance cost of a prefabricated steel stair is high, and the self weight of a prefabricated common concrete stair is large are solved.

Description

technical field [0001] The invention relates to the technical field of municipal engineering assembly, in particular to an urban prefabricated flyover staircase using UHPC and an implementation method thereof. Background technique [0002] With the development of construction technology and social economy, the construction field has begun to pursue green construction, industrialization and industrialization. The prefabricated construction technology is to manufacture the construction structural components in the factory, transport them to the construction site, and then complete the hoisting and splicing. Prefabricated construction, with short construction period, low time cost, little disturbance to the construction site, and low requirements for on-site construction conditions, has gradually become the development trend of building construction. For municipal projects, such as the construction of pedestrian bridges and supporting stair sections, the impact of prefabricate...

Claims

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Application Information

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IPC IPC(8): E01D1/00E01D19/00
CPCE01D1/00E01D19/00
Inventor 宋琢郑小红何文雄陆文胜张迪
Owner 广州市市政工程机械施工有限公司
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