MSE Retaining Wall Connector for Settlement Accommodation
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Solution Overview
Problem
Existing mechanically stabilized earth (MSE) structures face challenges in finding cost-effective and efficient methods to resist shear forces and accommodate vertical movements due to settling or thermal expansion, while avoiding obstructions like drainage pipes and ensuring structural integrity.
Innovation Solution
A system comprising a soil reinforcing element with converging longitudinal wires connected to a connection stud, which can swivel horizontally and shift vertically, secured to a facing anchor with vertically-offset connection points and a coupling device, allowing for flexibility and movement without compromising structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If soil reinforcing elements are rigidly fixed to facing anchors, then resistance to shear forces is maximized, but accommodation of vertical movements (settlement, thermal expansion) is prevented
Solution Approach 1:
The connection system transitions from a rigid fixed connection to a dynamic connection that allows controlled movement. The soil reinforcing element can swivel horizontally and shift vertically relative to the facing anchor while maintaining connection, enabling the structure to adapt to settlement and thermal expansion while preserving shear resistance through the coupling device.
2Ease of manufacture
If conventional facing anchors are used, then installation is straightforward, but cost-effectiveness and resistance to shear forces are insufficient
Solution Approach 1:
A connection stud serves as an intermediary element between the soil reinforcing element and the facing anchor. The connection stud includes a stem that couples to the soil reinforcing element and a tab with a hole that receives the facing anchor, allowing for a robust shear-resistant connection while maintaining ease of installation through standardized components.
3Stability of the object's composition
If soil reinforcing elements are constrained to prevent movement, then structural integrity is maintained, but obstructions like drainage pipes cannot be avoided
Solution Approach 1:
The connection system allows the soil reinforcing element to swivel horizontally and shift vertically, providing dynamic adaptability to avoid obstructions such as drainage pipes. This movement capability is maintained within the constraints of the coupling device, preserving structural integrity while enabling the element to navigate around obstacles in the backfill.
Data Source
AI summary
An apparatus and method of connecting an earthen formation to a concrete facing of a mechanically stabilized earth (MSE) structure. A one-piece connector having a stem and a tab, wherein the stem is connected to a soil reinforcing element embedded within the earthen formation and the tab is connected to a facing anchor attached to the concrete facing. The connection allows soil reinforcing mats to swivel in a horizontal plane, but also to shift vertically in reaction to MSE settling or thermal expansion/contraction of an MSE structure.