Precast Traffic Barrier Triangular Stem Soil Counterweight
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Solution Overview
Problem
Conventional concrete earth retaining walls require additional traffic barriers to prevent vehicles from falling off, which necessitate extra concrete and complex installation processes.
Innovation Solution
A precast traffic barrier with a horizontal cantilever triangular stem that utilizes the soil backfill weight as a counterweight to resist overturning and vehicular impacts, integrated into the earth retaining wall system to minimize concrete usage and simplify installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate traffic barrier is installed on top of the retaining wall, then vehicle impact protection is improved, but concrete usage and device complexity increase
Solution Approach 1:
The patent combines the traffic barrier function with the retaining wall structure by integrating a horizontal protruding stem into the retaining wall blocks. This merging eliminates the need for separate barrier installations, reducing device complexity while maintaining vehicle impact protection through the soil-backfilled stem structure.
Solution Approach 2:
The retaining wall blocks are designed with dual functionality: they provide earth retention through vertical walls and simultaneously provide vehicle impact protection through horizontal protruding stems. This multi-functionality eliminates the need for separate traffic barrier systems, simplifying the overall structure while maintaining both retention and safety functions.
2Stability of the object's composition
If conventional retaining wall construction is used with separate traffic barriers, then structural stability is achieved, but concrete usage increases
Solution Approach 1:
The horizontal protruding stem is designed to be backfilled with soil, creating a counterweight that resists overturning moments from vehicle impacts. This soil counterweight replaces the need for additional concrete mass, maintaining structural stability while reducing concrete usage. The stem geometry and soil placement create a balanced system that leverages the density advantage of soil over concrete.
Solution Approach 2:
The patent changes the material parameter from concrete to soil for the counterweight portion of the structure. By utilizing soil backfill instead of concrete for the horizontal stem, the design reduces concrete quantity while maintaining or improving stability through the soil's weight and frictional properties. This parameter change optimizes material usage based on each material's suitable applications.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The precast traffic barrier effectively prevents vehicle impacts and overturning by leveraging soil backfill weight, reducing the need for additional concrete and streamlining the installation process while maintaining structural stability.
Implementation Method 1
The downward pressure of the soil backfill beside and on top of the horizontal protruding stem provides the resisting pressure to have the exemplary precast traffic barrier act as a cantilever foundation with a vertical wall and resist impact loads from vehicles
Data Source
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AI summary
Disclosed herein is an embodiment of a roadside barrier to sit on top of a retaining wall to provide impact resistance to vehicular traffic. The precast concrete traffic barrier unit is designed to have a counterweight from soil backfill on the horizontal stem portion of the precast unit that acts to resist overturning pressures from vehicle impact on the precast traffic barrier portion which extends above the roadway surface. The horizontal stem is an exemplary designed triangular in shape to capture more of the backfill soil than typically what soil backfill rest directly above the horizontal stem or counterweight portion. Therefore, the triangular horizontal stem with its arching effect between adjacent units will allow more of the soil backfill to resist impact loading and reduce the amount of concrete needed to provide adequate vehicle restraint protection. An alignment seat locks the traffic barrier unit to the retaining wall below.