Segmental Retaining Wall Block With Interlocking Pegs
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Solution Overview
Problem
Conventional segmental retaining wall systems are prone to failure and deformation due to inadequate internal stabilization, leading to instability and increased costs in construction.
Innovation Solution
A set of interlocking blocks with specific geometric configurations and features, including laterally opposed end portions, a central portion, and a neck portion, along with vertically extending passages and pegs for interlocking, and tie connectors for external pipe connection, which allows for efficient internal stabilization and reduced earth pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional blocks and connectors are used for segmental retaining walls, then construction can proceed with standard materials and methods, but the system is prone to failure and deformation due to inadequate internal stabilization
Solution Approach 1:
The block is divided into distinct functional portions: a central portion for interlocking, end portions for structural support, and a neck portion for connector attachment. This segmentation allows each portion to specialize in a specific stabilization function, improving overall reliability while maintaining manageable complexity through modular design
Solution Approach 2:
The vertically extending passage is nested within the block structure, extending through the central and neck portions. This nested configuration allows the passage to be integrated into the block's geometry without adding external complexity, while providing internal stabilization through the passage's structural contribution
2Productivity
If dry-stacked pre-cast blocks are used to reduce cost and speed up construction, then installation becomes simpler and faster, but internal stabilization must be achieved through additional measures like soil nailing or geo-textile
Solution Approach 1:
The block design incorporates internal stabilization features directly into its structure, allowing the block to stabilize itself without requiring external soil nailing or geo-textile measures. The central portion with its vertically extending passage provides inherent structural stability, enabling dry-stacking to proceed quickly while maintaining stabilization
Solution Approach 2:
The structural support function and internal stabilization function are merged into a single integrated block design. The central portion, end portions, and neck portion work together as a unified structure that provides both load-bearing capacity and internal stabilization, eliminating the need for separate stabilization systems
3Ease of operation
If the central portion has a shorter longitudinal length than the end portions, then the block geometry optimizes interlocking and passage formation, but the structural distribution of forces becomes more challenging
Solution Approach 1:
Different portions of the block have different geometric characteristics optimized for their specific functions: the central portion has a shorter longitudinal length to facilitate interlocking and passage formation, while the end portions have greater length to provide structural support. This local differentiation of geometry allows ease of operation in the central region while maintaining strength at the critical end regions
Solution Approach 2:
The block functions as a composite structure where the central portion, end portions, and neck portion act as different structural elements working together. The varying longitudinal lengths create a composite geometry that combines the interlocking advantages of shorter central sections with the structural advantages of longer end sections, achieving both ease of operation and structural strength
Data Source
AI summary
The system for constructing a retaining wall can be used to construct a segmental retaining wall for retaining earth, on either side, at two different levels. The system includes a plurality of blocks. Each block has laterally opposed first and second end portions, a central portion and a neck portion. The central portion is positioned between the first end portion and the neck portion, and the neck portion is positioned between the second end portion and the central portion. The central portion has a longitudinal length less than a longitudinal length of the first end portion, the second end portion has a longitudinal length less than the longitudinal length of the central portion, and the neck portion has a longitudinal length less than the longitudinal length of the second end portion. A plurality of pegs can vertically interlock adjacent blocks. Tie connectors can connect the blocks to an external pipe.