Bridge Superstructure Launching with Auxiliary Bridge and SPMT Transport
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Solution Overview
Problem
Existing methods for constructing or replacing bridge structures require separate construction sites for each bridge, are complex, and are limited to multi-span bridges with low weight and small dimensions, making them inefficient and costly.
Innovation Solution
A method involving a temporary auxiliary bridge structure and a transport system using self-propelled modular transporters (SPMTs) to position prefabricated bridge superstructures, allowing for single-span bridge construction with minimal disruption, using lifting devices to distribute load without stressing abutments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate construction sites are established for each bridge superstructure, then bridge construction can be completed, but infrastructure costs increase and construction efficiency decreases
Solution Approach 1:
Multiple bridge superstructures are constructed simultaneously at a single centralized construction site rather than establishing separate construction sites for each bridge. The transport system moves multiple superstructures sequentially from the same site, merging construction activities to reduce infrastructure costs and improve overall construction efficiency.
Solution Approach 2:
The transport system serves multiple functions: it transports bridge superstructures from the centralized construction site to various bridge locations, positions them accurately, and facilitates their installation. This universal transport mechanism replaces the need for multiple specialized construction sites and equipment sets.
2Ease of manufacture
If traditional transport methods are used for bridge superstructures, then construction can proceed, but road disruption increases and construction time extends
Solution Approach 1:
Bridge superstructures are pre-assembled and prepared at a centralized construction site before being transported to the final bridge location. This preliminary construction activity allows the actual bridge installation to be completed quickly, minimizing road disruption time while maintaining construction feasibility.
3Ease of operation
If lifting devices are positioned on abutments, then bridge superstructures can be installed, but abutment stress increases and installation flexibility decreases
Solution Approach 1:
A transport system with movable lifting devices serves as an intermediary mechanism between the bridge superstructure and the abutments. The lifting devices are positioned on the bridge deck or temporary supports rather than directly on the abutments, distributing loads more evenly and reducing stress concentration on the abutment structures while maintaining installation capability.
4Adaptability or versatility
If rail-guided rolling structures are used for multi-span bridges, then components can be moved, but device complexity increases and application scope is limited
Solution Approach 1:
The transport system is designed with universal applicability to handle both single-span and multi-span bridges of various sizes and weights. Instead of using complex rail-guided rolling structures limited to specific bridge types, this system provides a flexible, adaptable solution that can accommodate different bridge configurations without increasing device complexity.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
The present invention relates to a method for installing a bridge superstructure (12) to complete a bridge structure (2), characterized by the steps of: - constructing a temporary auxiliary bridge structure (6) in the area of the bridge structure (2) to be completed for temporarily bridging the area to be spanned by the bridge structure (2), - arranging a prefabricated bridge superstructure (12) on a transport device (14), transporting the bridge superstructure (12) with the transport device (14) onto the auxiliary bridge structure (6) and positioning the bridge superstructure (12) relative to the bridge abutments (4) of the bridge structure (2) to be completed, - transferring the load of the bridge superstructure (12) by means of a lifting device (22), - removing the transport device from the bridge area, - removing the temporary auxiliary bridge structure (6).- Lowering the bridge superstructure (12) onto the bridge abutments (4) using the lifting device (22).