Security Barrier Shallow Foundation Rotation Axis
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Solution Overview
Problem
Existing security barriers require deep foundations, which can interfere with urban infrastructure like power lines and communication cables, and often pose safety hazards or add complexity and cost due to their design.
Innovation Solution
A security barrier with a curved barrier member that can be deployed and stowed with a shallow ground presence, using an axis of rotation above the upper part of the support, allowing for shallow concrete foundations and a close fitment to the ground, along with a drive device for rotatable movement, enhancing safety and resistance to crash impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a wedge-shaped barrier member is used that pivots at ground level, then the barrier can be deployed to a height of 1.5 metres, but a deep foundation is required which may interfere with urban services
Solution Approach 1:
The barrier member is rotated from pivoting at ground level to pivoting on an axis above the upper part of the support. This dimensional change in the rotation axis location allows the barrier to achieve the same deployment height while requiring much shallower foundations, thereby avoiding interference with urban services such as power lines, drains, or communication cables.
2Ease of operation
If a rectangular flat plate with skirt is used that pivots at ground level, then the barrier can be deployed, but an overhang above ground is formed which poses a safety hazard
Solution Approach 1:
By changing the pivot axis from ground level to above the upper part of the support, the barrier member can be deployed without creating a hazardous overhang. The rotation occurs in a different spatial dimension, allowing the barrier to clear the ground safely while maintaining structural integrity and eliminating the safety hazards associated with ground-level pivoting.
3Length of stationary object
If a telescopic post is used to reduce foundation depth, then the foundations are not required to be as deep, but cost and complexity are increased
Solution Approach 1:
Instead of using a telescopic mechanism to reduce foundation depth, the invention changes the dimension of the pivot axis location. By pivoting on an axis above the upper part of the support rather than at ground level, the barrier achieves shallow foundations without requiring complex telescopic structures, thereby reducing device complexity and cost while maintaining the desired foundation depth reduction.
4Length of stationary object
If a post pivotable below ground level is used, then shallow foundations are required, but an additional step of opening a flap is required to deploy the post
Solution Approach 1:
The invention eliminates the need for flap opening by changing the pivot axis location to above the upper part of the support. This dimensional change allows the barrier member to be deployed directly without requiring additional operational steps, thereby simplifying the deployment procedure while maintaining shallow foundation requirements.
Data Source
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AI summary
The invention relates to a security barrier, and a method for operation thereof. The security barrier (10) comprising a support (12) and a barrier member (30) movable relative to the support between a stowed position and a deployed position. The support (12) having an upper part (22) for positioning substantially at ground level (106). The barrier member (30) being rotatably mounted relative to the support (12) such that an axis of rotation (76) of the barrier member (30) is above the upper part (22).