Three-Truss Girder Pushing Device with Passive Middle Truss
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Solution Overview
Problem
The complex construction and high costs associated with building three-truss continuous steel truss girders, particularly due to the complexity and environmental dependencies of existing methods, necessitate a more efficient and cost-effective approach.
Innovation Solution
A three-truss continuous steel truss girder-pushing device comprising left, middle, and right supporting structures, a slideway girder system with vertical and horizontal pushing jacks, and sliding blocks, which allows for synchronized pushing of side trusses while the middle truss slides passively, reducing stress on nodes and facilitating easier river crossings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cantilever erection construction is carried out by using the slinging tower, then the steel truss girder can be erected, but the construction process becomes complex and many unsafe factors arise
Solution Approach 1:
The patent replaces the complex slinging tower mechanical system with a simpler pushing method that uses horizontal continuous pushing jacks and sliding blocks to move the steel truss girder segments into position, eliminating the need for tall lifting towers and complex rigging operations
Solution Approach 2:
The patent extracts and removes the slinging tower from the construction system entirely, using only the necessary pushing components (jacks, sliding blocks, and reaction forces from bridge piers) to achieve the erection, thereby simplifying the construction process and eliminating associated safety hazards
2Ease of manufacture
If cantilever erection construction is carried out by adding the temporary pier, then the steel truss girder can be erected, but large investment, high building difficulty, and high costs are incurred
Solution Approach 1:
The patent uses simple, inexpensive sliding blocks and pushing jacks that can be easily assembled and disassembled, replacing the need for expensive temporary piers that require significant material investment and complex construction
Solution Approach 2:
The patent completely eliminates the temporary pier from the construction system, using the existing bridge piers and the pushing mechanism to achieve erection without any additional permanent or temporary support structures
3Productivity
If pushing method is used, then field occupation is reduced and construction quality is ensured, but it has not been applied in the erection of the three-truss continuous steel truss girder
Solution Approach 1:
The patent divides the three-truss continuous steel truss girder into separate segments (side trusses and middle truss) that can be pushed independently using the same pushing mechanism, making the method adaptable to this specific three-truss configuration
Solution Approach 2:
The patent creates a universal pushing system that can handle different truss configurations (side trusses and middle truss) using the same basic mechanism of horizontal pushing jacks and sliding blocks, demonstrating the method's versatility for three-truss continuous structures
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 method improves construction efficiency, reduces costs, minimizes temporary pier requirements, enhances flood prevention, and shortens construction periods by ensuring only nodes are stressed during pushing, thus avoiding obstacles and maintaining construction quality.
Implementation Method 1
a stainless steel plate is welded on a top surface of the steel plate
Data Source
AI summary
The present invention claims a three-truss continuous steel truss girder-pushing device and an arrangement method thereof. The device comprises three supporting structures of left, center and right, the three supporting structures are provided respectively with left and right side truss slideway girders and a middle truss slideway girder. The front ends of the slideway girder are provided with an operating platform where horizontal continuous pushing jacks are installed; the front ends of the left and right slideway girder and the center slideway girder are each provided with four vertical lifting jacks. The three-truss continuous steel truss girder-pushing device simultaneously pushes the two side trusses of the steel truss beam only, while the center truss slides passively, thereby improving construction efficiency and reducing construction costs.