Concrete Barrier Structure with Compliant Layer for Impact Absorption
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Solution Overview
Problem
Large mining trucks often cause accidents by backing over retaining walls or veering off during dumping, leading to damage and injury, and existing dump curbs are prone to damage from repeated impacts, compromising their structural integrity and increasing accident likelihood.
Innovation Solution
A vehicle barrier system comprising a barrier structure integrally connected to a moment slab, featuring a front curb section and side curb sections forming a concrete form with a hollow interior, reinforced with rebar and vertically oriented lateral support members, designed to prevent vehicles from backing over retaining walls and contain dumped material, installed on elevated structures like retaining walls or rock walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional concrete dump curb is used to prevent trucks from backing over retaining walls, then vehicle safety is improved, but the curb structure is damaged by repeated impacts from large mining trucks
Solution Approach 1:
The patent applies beforehand cushioning by incorporating a compliant layer between the concrete curb and the retaining wall. This layer is designed to absorb and dissipate impact forces from truck tires before they reach the rigid concrete structure, preventing damage while maintaining the safety function. The compliant layer acts as a shock absorber that deforms elastically during impact events.
Solution Approach 2:
The patent uses composite materials by combining concrete with a compliant material layer. This creates a composite curb structure that leverages the high compressive strength of concrete for structural integrity while the compliant material provides shock absorption and flexibility. The composite design allows the curb to withstand repeated impacts without cracking or failing.
2Reliability
If a higher curb is used to prevent vehicles from veering off, then safety is improved, but it becomes more difficult for drivers to see and avoid the curb
Solution Approach 1:
The patent applies color changes by incorporating highly visible, contrasting colors into the curb design. The curb is painted or constructed with colors that stand out against the surrounding environment, making it easily detectable by drivers. This visual enhancement allows drivers to see the curb from greater distances and at various angles, improving their ability to avoid accidental contact while maintaining the safety barrier function.
3Reliability
If the curb is designed to stop truck rear wheels, then prevention of backing over retaining wall is achieved, but the curb becomes vulnerable to damage from the immense weight and force of large mining trucks
Solution Approach 1:
The patent applies beforehand cushioning by placing a compliant layer between the curb and the retaining wall. This layer is specifically designed to absorb the immense impact forces generated by large mining trucks before they can damage the concrete structure. The compliant material deforms elastically during impact, dissipating energy and protecting the rigid curb elements.
Solution Approach 2:
The patent uses an intermediary approach by introducing a compliant layer as a mediator between the truck tires and the concrete curb. This intermediary layer serves as a buffer that reduces the direct transmission of impact forces to the curb structure, thereby preventing damage while maintaining the curb's ability to stop vehicles.
Data Source
AI summary
A vehicle barrier system is provided. The system includes a barrier structure integrally connected to a moment slab. The barrier structure includes a front curb section connected to two side curb sections that each extend at an angle from the front curb section in a direction toward the moment slab. The front and side curb sections are formed by a casing into which concrete is poured. The barrier structure and moment slab are cast-in-place concrete structures. The barrier structure may be installed on top of an elevated structure so that a vehicle may back up to the front curb section and dump material from the elevated structure. The barrier structure includes opposing walls on either side of the moment slab to contain and redirect any dumped material into a receiving structure.