Drive-over berm system protects liner from traffic damage
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Solution Overview
Problem
Current drive-over berm systems for protective containment liners are prone to damage from heavy equipment traffic, leading to leaks and reduced sump capacity, as they lack effective protection for the liner and are difficult to decontaminate and move.
Innovation Solution
A drive-over berm system with an inner and outer berm structure that includes a base, sidewall, and ramp surface, along with a connector plate and riser insert to elevate the liner, providing a protected liquid containment barrier and allowing for easy connection and disconnection of berm sections for storage and transportation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the liner is pulled over the berm to provide sidewalls, then the containment structure is formed, but the liner is directly exposed to drive-over traffic and suffers punctures and tears
Solution Approach 1:
A protective berm structure is introduced as an intermediary element between the liner and the drive-over traffic. The berm includes a base layer, a protective cover layer, and optional reinforcement layers, creating a mediator that absorbs and distributes the mechanical stresses from equipment traffic while protecting the underlying liner from direct contact and damage.
Solution Approach 2:
The berm is divided into multiple functional segments: a base layer for structural support, a protective cover layer for direct traffic contact, and optional reinforcement layers. This segmentation allows each layer to perform its specific function while collectively protecting the liner from traffic-related damage.
2Duration of action of stationary object
If railroad ties are used for berms, then the structure is durable and reusable, but they are difficult to decontaminate due to chemical absorption
Solution Approach 1:
The berm utilizes geotextile fabrics and engineered soil structures that control porosity to prevent chemical absorption while maintaining structural integrity. The geotextile layer acts as a barrier that allows fluid drainage while blocking contaminant penetration into the berm structure, enabling easier decontamination and reuse.
Solution Approach 2:
The berm is constructed as a composite structure combining geotextile fabrics, engineered soils, and protective cover layers. This composite design integrates the advantages of different materials: the geotextile provides chemical resistance and ease of cleaning, while the soil structure provides structural support and stability.
3Device complexity
If earthen berms are built, then the containment structure is simple, but heavy equipment is required to build and they flatten under repeated vehicle traffic
Solution Approach 1:
The berm design changes key parameters from simple earthen mounds to engineered structures with controlled density, composition, and layered construction. The engineered soil has optimized compaction and structural properties that maintain height and shape under repeated traffic loads, preventing the flattening issue while remaining relatively simple to construct.
Solution Approach 2:
The berm combines engineered soil materials with geotextile reinforcement layers to create a composite structure that maintains structural integrity under traffic loads. The geotextile layers provide tensile strength and prevent soil displacement, while the engineered soil provides compressive strength and shape stability.
4Volume of stationary object
If the sump capacity is increased by multiplying liner area by berm height, then containment capacity improves, but the berm must maintain height despite traffic loading
Solution Approach 1:
The berm is segmented into multiple functional layers including a base layer for structural support, protective cover layers for traffic resistance, and optional reinforcement layers. This segmentation allows the structure to maintain overall height and shape under traffic loads while each layer performs its specific mechanical function.
Solution Approach 2:
The multi-layer composite structure combines materials with different mechanical properties to resist traffic loading and maintain berm height. The geotextile reinforcement layers provide tensile strength to prevent collapse, while the engineered soil provides volumetric stability, ensuring the sump capacity remains constant despite repeated traffic exposure.
Data Source
AI summary
Drive-over berm systems that protect raised sections of protective containment liners from truck and heavy equipment damage are disclosed. A ramped outer berm abuts an elevated portion of the liner, which may be raised to a desired height by an insert positioned under the liner. A ramped inner berm may about the elevated portion of the liner, and a connector plate may be used to secure the outer and inner ramped berms together. The height of the raised portion of the liner is selected to provide the desired sump capacity of the containment area. The inner berm and/or outer berm may be provided in sections that can be connected end-to-end.