Bridge Floor Slab with Integrated Side Barriers
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Solution Overview
Problem
The construction of bridge floor slabs is complex, time-consuming, and costly, especially for skew bridges, due to the need for on-site concrete placement and curing, which also leads to water leakage and inadequate load resistance.
Innovation Solution
A floor slab structure comprising interconnected girder-integrated and side barrier-integrated slabs made of concrete, with integrated steel beams and pre-stressing steel wires, allowing for simultaneous installation and assembly without on-site concrete placement, featuring transverse and longitudinal shear keys, drainage grooves, and sealing grooves for enhanced waterproofing and load resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional concrete placement and curing method is used for floor slab construction, then the floor slab can be formed with sufficient strength, but the construction time is significantly extended and labor costs increase
Solution Approach 1:
The floor slab is divided into multiple precast panels that are manufactured separately and then assembled on-site. Each panel is produced independently in a controlled environment, allowing parallel production and eliminating the sequential nature of traditional cast-in-place construction. This segmentation enables the floor slab structure to be built much faster while maintaining structural integrity through precise connection details.
Solution Approach 2:
The floor slab panels are precast in advance at a manufacturing plant before being transported to the construction site. All concrete placement, curing, and initial strength development occur during the precasting phase, allowing on-site assembly to proceed without waiting for concrete to cure. This preliminary action transfers the time-consuming processes to a controlled manufacturing setting where they can be optimized independently of the construction schedule.
2Reliability
If traditional on-site mould installation and concrete pouring is used for side barriers, then the side barriers can be formed, but the construction time is extended and the process becomes more complex
Solution Approach 1:
The side barriers are integrated with the floor slab panels as a single precast unit. The connection between the floor slab and side barriers is established during the precasting process, eliminating the need for separate on-site installation of moulds and concrete pouring for the side barriers. This merging of components simplifies the construction process by reducing the number of distinct installation steps while ensuring reliable connections through factory-controlled manufacturing.
3Ease of manufacture
If traditional separate construction of floor slab and side barriers is used, then each component can be constructed independently, but the total construction time increases and labor costs rise
Solution Approach 1:
The floor slab and side barriers are combined into a single integrated precast panel assembly. This allows both components to be manufactured simultaneously in one production cycle rather than requiring separate construction sequences on-site. The integrated design maintains the functional independence of each component while achieving construction efficiency through unified manufacturing and single-step installation.
4Strength
If conventional floor slab construction is used, then the structure can be built, but water leakage occurs and waterproofing is insufficient
Solution Approach 1:
Waterproofing measures are incorporated during the precasting process rather than being applied as afterthoughts on-site. Integral waterproofing components such as sealing channels, drainage paths, and waterproof membranes are built into the panel design and construction process. This preliminary integration of waterproofing ensures that water leakage prevention is addressed at the source during manufacturing, where quality control can be more effectively implemented.
Data Source
AI summary
The present disclosure relates to a floor slab structure for a bridge, the structure comprising: a girder-integrated floor slab having a girder member which is supported on a pier and supports a floor slab member, and which integrally protrudes from the lower surface of the floor slab member, multiple floor slab members being arranged to be connected in longitudinal and transverse directions; and a side barrier-integrated floor slab having a side bather member which integrally protrudes from the upper surface of one side of the floor slab member, multiple floor slab members being arranged to be connected in longitudinal and transverse directions. Accordingly, on-site work is minimized, the construction process for a bridge superstructure is simplified, the construction time period is shortened, the construction costs are significantly reduced, and the construction of skew bridges or curved bridges is simplified.