Wire Facing Crimps for MSE Shear Resistance
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Solution Overview
Problem
Existing mechanically stabilized earth (MSE) structures face challenges in providing sufficient resistance to shear forces, particularly in attachment methods between soil reinforcing elements and facing structures, which can lead to erosion and structural instability.
Innovation Solution
The proposed solution involves a system and method for constructing MSE structures using a wire facing with crimps and connector leads, where soil reinforcing elements are coupled to the facing elements with crimps and connection devices, ensuring secure attachment and resistance to shear forces through a combination of wire configurations and connection devices like hog rings or wire ties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional wire facing with simple attachment methods is used, then construction is simpler and faster, but resistance to shear forces is insufficient leading to erosion and structural instability
Solution Approach 1:
The wire facing is divided into modular units with standardized connector leads and crimp positions. Each module can be independently attached to soil reinforcing elements, allowing systematic distribution of shear force resistance across multiple attachment points rather than relying on single complex connections.
Solution Approach 2:
Crimps are pre-formed in the wire facing at specific locations before assembly. This preliminary preparation ensures that when soil reinforcing elements are installed, the attachment points are already positioned and configured to optimally resist shear forces, eliminating the need for complex field adjustments.
2Reliability
If soil reinforcing elements are loosely attached to facing structures, then construction is faster and easier, but erosion prevention and structural stability are compromised
Solution Approach 1:
The crimp structure is designed to automatically engage and secure the soil reinforcing element to the wire facing through its geometric configuration. The deformation of the crimp around the connector lead creates a self-locking mechanism that provides reliable attachment without requiring additional fastening operations or complex assembly procedures.
Solution Approach 2:
The wire diameter, crimp depth, and connector lead spacing are optimized to specific parameter ranges that balance attachment strength with construction ease. These parameters are selected to provide sufficient shear resistance while maintaining practical installability with standard equipment and methods.
3Strength
If multiple attachment points per soil reinforcing element are used, then shear force resistance is improved, but construction time and complexity increase
Solution Approach 1:
The connector lead design serves multiple functions simultaneously: it provides structural connection between soil reinforcing elements and wire facing, positions the attachment at optimal locations for shear resistance, and enables rapid installation through its standardized configuration. This multi-functionality reduces the number of separate operations needed while maintaining strength.
Solution Approach 2:
The crimped connection is designed as a simple, inexpensive metal deformation that provides sufficient attachment life for the structure's service period. The low cost and simplicity of each crimp allowance multiple attachment points without significantly increasing overall construction time or complexity.
Data Source
AI summary
A system and method of constructing a mechanically stabilized earth (MSE) structure is provided. A wire facing is composed of horizontal and vertical elements, where a soil reinforcing element is coupled to the wire facing at one or more crimps formed in either of the horizontal or vertical elements. A connection device may be inserted through an opening defined between the soil reinforcing element and the one or more crimps such that the soil reinforcing element may be coupled to the wire facing. A strut may be coupled to the top-most cross wire of the vertical element and the terminal wire of the horizontal element to maintain the vertical element at a predetermined angle with respect to the horizontal element as backfill is added to the wire facing.