High-Strength Steel Shoring Framework Manual Handling
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Solution Overview
Problem
Existing shoring systems for medium load ranges are cumbersome and require cranes for handling due to heavy components and high assembly/disassembly efforts, primarily because of large dimensions and the need for multiple screws for connections.
Innovation Solution
The use of high-strength steel with an upper yield point of more than 490 MPa allows for reduced bar and bolt dimensions, enabling lighter components that can be handled manually, with fewer bolts and alternative connection methods like socket bolts, which are easier to assemble and disassemble, and incorporating U-profiles and plate-shaped connectors for increased stability and reduced buckling load capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional steel with lower yield strength is used, then components can be manufactured with standard dimensions and materials, but the components become heavy and require cranes for handling
Solution Approach 1:
The patent applies parameter changes by transitioning from traditional steel with yield strength of 235-355 MPa to high-strength steel with yield strength of 490-550 MPa. This material parameter change enables a reduction in component dimensions and weight while maintaining the required load-bearing capacity of 100-1000 kN per upright
Solution Approach 2:
The support frame is segmented into modular components (uprights, crossbars, connectors) that can be independently manufactured and assembled. This segmentation combined with high-strength steel allows each component to be optimized for minimal weight while maintaining structural integrity
2Reliability
If six M16 bolts are used to attach each connector to a beam, then the connection is secure and meets load requirements, but the assembly and disassembly effort becomes very high
Solution Approach 1:
The connection system is segmented into separate functional elements: high-strength steel components provide structural integrity while fewer bolts (reduced from six to four or fewer) provide the necessary clamping force. This segmentation allows optimization of each element's function
Solution Approach 2:
The bolt configuration parameters are changed by reducing the number of bolts required per connection. The high-strength material properties enable achieving the same connection reliability with fewer fasteners, directly reducing assembly time and labor effort
3Strength
If beam height is increased to reduce buckling, then load-bearing capacity improves, but the components become heavier and harder to handle
Solution Approach 1:
The material yield strength parameter is changed from 235-355 MPa to 490-550 MPa, which fundamentally changes the buckling resistance characteristics. This allows beams to maintain adequate buckling resistance at reduced heights and weights that are manually manageable
Solution Approach 2:
The patent employs U-profiles with curved geometries in the beam design. These curved cross-sections provide enhanced moment of inertia and buckling resistance compared to straight profiles, allowing reduced beam height while maintaining stability
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a supporting framework (18) having at least one connector (22) and at least two bars (24a-d) arranged on the connector (22). The bars (24a-d) are preferably arranged on the connector (22) at their longitudinal end regions. The connection between bars (24a-d) and connector (22) is achieved by at least one bolt (26a-h), in particular by two bolts (26a-h). The bolt (26a-h) is or the bolts (26a-h) are preferably designed in the form of plug-in bolts, in particular of fit bolts. The bolt (26a-h) has or the bolts (26a-h) have preferably a diameter of more than 28 mm that acts in the connection to the connector (22). The bars (24a-d) are formed from a steel having an upper yield strength of above 490 MPa. The bar height is less than 200 mm. Bars (24a-d), bolts (26a-h) and connector (22) are preferably part of a lattice truss of the supporting framework, wherein the lattice truss has a lattice truss height of at least 2100 mm.