Dual Grid Rockfall Net Anchor Load Distribution
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Solution Overview
Problem
Conventional rope netting systems for rockfall prevention face challenges in increasing the number of anchors sharing the loading, leading to reduced safety and effectiveness, especially at steeper inclinations where the acceptable load is lower.
Innovation Solution
The proposed solution involves a dual grid-like structure with second main wires placed at intermediate positions between the first main wires, sharing the loading through a network of anchors with a sediment anchoring device and pull-out prevention mechanism, increasing the number of anchors sharing the load and improving safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of anchors is increased to enhance the acceptable load, then the safety and load-bearing capacity improve, but the device complexity and construction difficulty increase
Solution Approach 1:
The patent divides the anchoring system into two distinct grid structures: a first grid-like structure with first main ropes and first anchors, and a second grid-like structure with second main ropes and second anchors. This segmentation allows the system to achieve higher reliability through increased anchor density while maintaining manageable complexity by organizing anchors into systematic grids with different orientations and spacing patterns.
Solution Approach 2:
The patent introduces a second grid-like structure that adds a new dimension to the anchoring system. The second main ropes are placed at intermediate positions between the first main ropes, creating a denser, multi-layered anchor network. This dimensional expansion increases the number of anchors sharing the load without simply replicating the same structure, thereby improving safety while distributing complexity across different spatial arrangements.
2Reliability
If the spacing between main ropes is reduced to increase the number of grid blocks, then the load distribution improves, but the construction cost and complexity increase
Solution Approach 1:
The patent applies different spacing configurations to different parts of the system. The first main ropes have a standard spacing (e.g., 2m), while the second main ropes are placed at intermediate positions, creating local variations in grid block size and anchor density. This allows optimized load distribution in critical areas without uniformly increasing construction complexity and cost across the entire system.
Solution Approach 2:
By introducing the second grid-like structure with intermediate positioning, the patent effectively creates a finer mesh pattern without requiring a uniform reduction in the first grid's spacing. This dimensional approach achieves improved load distribution through the combined effect of two grids rather than requiring a single, overly dense grid, thereby controlling construction costs.
3Strength
If the diameter of main ropes is increased to enhance load-bearing capacity, then the acceptable load increases, but the material cost and structural weight increase
Solution Approach 1:
The patent segments the load-bearing function across multiple ropes with standard diameters rather than relying on fewer, thicker ropes. The first and second main ropes, each with conventional diameter, work together in a combined grid structure to achieve the same or greater total load-bearing capacity, thereby reducing material cost while maintaining strength.
Solution Approach 2:
The patent merges the functions of two separate grid structures into a unified rockfall prevention system. The first and second main ropes, along with their respective anchors, are combined to create a synergistic system where the total load-bearing capacity equals or exceeds that of a single structure with thicker ropes, thus avoiding the need for increased rope diameter and associated material costs.
Data Source
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AI summary
Net structure comprising a first grid-like structure 1 which comprises a plurality of first main wires 3 placed on a sloped mounting surface in a grid-like fashion, and a plurality of first fixing tools 4, 5 fixing the first main wires 3 to the mounting surface; and a second grid-like structure 2 which comprises a plurality of second main wires 6 placed on the mounting surface in a grid-like fashion, and a plurality of second fixing tools 7, 8 fixing the second main wires 6 to the mounting surface. The second main wires 6 are placed at positions different from positions of the first main wires 3, and placed on the first main wires 3 in contact therewith at intersections with the first main wires 3. At least one of the second fixing tools 7, 8 is placed within at least one grid in the first grid-like structure 1.