Precast Arch Bridge Segments with Shiplap Joints
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Solution Overview
Problem
Conventional arch bridge systems require heavy equipment and extensive materials and labor for construction, often relying on cast-in-place methods that increase costs and time, and face challenges with scalability and precise joint alignment due to limited use of precast and modular components.
Innovation Solution
An arch bridge system comprising precast side walls, arch beams, and decking panels with cast-in-place concrete connections, utilizing shiplap joints for alignment and stability, and a modular foundation system that allows for rapid and economical construction with reduced equipment needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cast-in-place methods are used to construct arch bridge systems, then structural integrity can be achieved, but construction time and costs increase significantly
Solution Approach 1:
The arch bridge system is divided into discrete precast segments including arch segments, deck segments, abutment segments, and pier segments. Each segment is manufactured separately in a controlled environment and then assembled on-site, eliminating the need for extensive cast-in-place operations while maintaining structural integrity through precise segmentation and connection design.
Solution Approach 2:
Arch segments, deck segments, and other structural components are precast in advance in controlled manufacturing environments before being transported to the construction site. This preliminary action allows for quality control, accelerated construction scheduling, and eliminates time-consuming on-site casting operations while ensuring structural reliability.
2Strength
If conventional arch bridge systems use large components requiring heavy equipment, then structural strength is achieved, but equipment costs and construction complexity increase
Solution Approach 1:
The bridge structure is segmented into manageable precast components that can be handled with standard equipment. By dividing the arch, deck, and support structures into discrete segments, the system achieves required structural strength through proper segment design and connection details while avoiding the need for oversized heavy-lift equipment.
Solution Approach 2:
Structural strength is optimized locally at critical connection points between segments rather than requiring uniformly massive components throughout. The precast segments are designed with appropriate reinforcement and connection details at joints to ensure structural integrity while maintaining lighter overall component weights that can be handled with conventional equipment.
3Ease of manufacture
If conventional systems require forms to be built in the field, then cast-in-place components can be produced, but additional materials, labor, and planning are required
Solution Approach 1:
The system uses precast segments manufactured off-site, eliminating the need for field-form construction. Each segment is produced in a controlled environment using permanent forms, and then assembled on-site without requiring additional formwork materials, labor, or planning that would be necessary for cast-in-place construction.
Solution Approach 2:
All structural components are precast in advance in controlled manufacturing facilities, eliminating the need for on-site form construction. This preliminary manufacturing action transfers all formwork requirements to the fabrication shop, where forms can be reused multiple times, eliminating field material consumption and associated labor.
4Manufacturing precision
If conventional systems use decking panels with precise joints, then structural alignment is achieved, but matching shape and alignment of adjacent panels becomes difficult
Solution Approach 1:
The deck is divided into standardized precast segments with uniform dimensions and pre-formed connection details. Each segment incorporates integrated reinforcement and connection elements that simplify alignment and joining, eliminating the complexity of matching custom-shaped panels while maintaining precise joint alignment through standardized fabrication procedures.
Data Source
AI summary
An arch bridge system including first and second side walls, a foundation, and arch beams. The first and second side walls each include side wall sections supported by the foundation and aligned along the width of the system. Adjacent side wall sections form a column therebetween that defines an interior void extending along a height of the column. A first end of each arch beam is supported at the first side wall at an upper portion of one of the columns and a second end is supported at the second side wall at an upper portion of another one of the columns. Each interior void has reinforced concrete forming cast-in-place columns defining rigid, fixed, monolithic connections between the foundation, the first and second side walls, and the plurality of arch beams. A method of producing an arch bridge system is also disclosed.