Slip Forming Bridge Copings with Exposed Rebars
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for fabricating bridge coping in highway construction are either labor-intensive and slow or require extensive on-site preparation, failing to efficiently produce a monolithic, structurally coherent structure that conforms to uneven terrain or inclines without additional manual labor or preparation.
Innovation Solution
A slip forming process utilizing a tunnel mold assembly with channels for rebars, allowing partial embedding and exposure, combined with auger distribution and vibration for concrete consolidation, enabling on-site fabrication of monolithic concrete structures with embedded and exposed rebars that can be integrated with other structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional manual casting methods are used for bridge coping, then on-site fabrication is possible, but the process is labor-intensive and slow
Solution Approach 1:
The patent replaces manual casting operations with a slip-forming machine that automatically forms concrete structures. The machine continuously moves along the terrain, pouring and vibrating concrete to create monolithic copings, eliminating the need for manual formwork and casting operations while maintaining on-site fabrication capability
Solution Approach 2:
The slip-forming process enables continuous construction without interruption. The machine moves continuously along the terrain profile, constantly forming concrete structures as it progresses, rather than requiring discrete casting cycles. This continuous operation significantly increases productivity and reduces labor intensity
2Ease of manufacture
If conventional casting methods are used, then on-site fabrication is achievable, but extensive on-site preparation is required
Solution Approach 1:
The patent performs preliminary actions by pre-configuring the terrain profile and reinforcement steel before the slip-forming operation. The terrain is prepared with predetermined gradients and contours, and reinforcement bars are pre-positioned, allowing the machine to directly form the final structure without extensive on-site preparation activities
Solution Approach 2:
The slip-forming machine replaces manual preparation activities with automated terrain following capability. The machine automatically adapts to terrain variations and creates monolithic structures that conform to the terrain profile, eliminating the need for manual formwork adjustment and extensive site preparation
3Stability of the object's composition
If piecewise construction is used for bridge coping, then construction flexibility is maintained, but the resulting structure lacks monolithic coherence
Solution Approach 1:
The slip-forming process creates a continuous monolithic structure by continuously pouring and vibrating concrete without interruption. The machine moves continuously along the terrain, ensuring that the entire coping structure is formed as a single unified piece, eliminating joints and seams that would compromise structural coherence
Solution Approach 2:
The vibration mechanism continuously vibrates the concrete during formation, ensuring complete consolidation and eliminating voids. This continuous vibration process ensures that the entire structure achieves uniform density and structural coherence throughout, creating a truly monolithic product
4Adaptability or versatility
If standard casting forms are used, then construction simplicity is maintained, but the ability to conform to uneven terrain is limited
Solution Approach 1:
The slip-forming machine features dynamic terrain-following capability that allows it to adapt to varying ground conditions. The formwork system can adjust and reconfigure as the machine moves along uneven terrain, maintaining contact with the ground profile and creating structures that conform to the terrain without requiring complex static formwork designs
Solution Approach 2:
The patent replaces complex static formwork systems with a dynamic slip-forming machine that automatically adapts to terrain variations. The machine's continuous movement and vibration capabilities allow it to conform to uneven ground profiles, eliminating the need for complex adjustable formwork while maintaining terrain conformance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This process simplifies on-site fabrication, reduces manual labor, and allows for accelerated construction schedules while producing structures that conform to uneven terrain, integrating seamlessly with other concrete structures.
Implementation Method 1
a plurality of vibration means, strategically positioned within the mold cavity of the tunnel mold, for consolidating the unset concrete within the mold cavity and thereby eliminating any voids or lack of continuity within the resultant slip formed structure
Implementation Method 2
auger means for essentially uniform distribution of unset concrete within the mold cavity of the tunnel mold
Data Source
AI summary
A process for slip forming of concrete structures, specifically, concrete structural components, for road and bridge construction. This process has particular application for slip forming of monolithic structures having multiple component/functional parts, wherein the resultant slip formed monolithic, structure has exposed rebars bar the later integration with additional concrete structures arid/or mechanical structural elements, c,g. noise walls, barricades, guard rails and the like. This invention also includes a system adapted for the formation of these unique, monolithic slip formed structures with exposed rebars, including the tunnel mold assembly, which is utilized in this slip forming process; and, the resultant to slip molded monolithic structural component with exposed rebus.