Sediment Control Device Segmented Filtration
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Solution Overview
Problem
Existing sediment control technologies are inadequate in effectively preventing sediment transfer across boundaries, particularly during construction site runoff and in defining areas like lawns or planting zones, as they fail to efficiently collect sediment and prevent its wash-in or wash-out.
Innovation Solution
The development of a sediment control device (SCD) comprising an elongate channel with a substantially planar seat portion and a free portion that includes an elongate threshold member, outflow member, and filter member, where the threshold and outflow members are secured together with minimal hollow space, and the filter member has smaller apertures, designed to fit into a ground channel with the free portion extending upwards, thereby controlling sediment transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing sediment control technologies are used, then some sediment control is provided, but they fail to efficiently collect sediment and prevent its wash-in or wash-out during construction site runoff
Solution Approach 1:
The SCD is divided into distinct functional segments: a seat portion for ground insertion, a free portion extending upward, a threshold member with larger apertures for initial filtration, an outflow member for water discharge, and a filter member with smaller apertures for fine sediment capture. This segmentation allows each component to perform its specific function optimally, improving both reliability and productivity of sediment control.
Solution Approach 2:
Different portions of the SCD have different aperture sizes and structural characteristics tailored to their specific functions. The threshold member has larger apertures to allow high flow rates during initial runoff, while the filter member has smaller apertures to capture fine sediment particles. This local differentiation of properties enables the device to handle both high-volume runoff and fine sediment extraction effectively.
2Reliability
If the SCD has minimal hollow space between threshold and outflow members, then sediment control efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The threshold member and outflow member are secured together in close proximity with minimal hollow space between them, effectively merging their functions into a compact assembly. This reduces the overall structural complexity while maintaining high sediment control efficiency, as the closely spaced members work together to filter sediment without requiring additional support structures or large internal volumes.
3Reliability
If the filter member has smaller apertures, then sediment filtration is improved, but water flow resistance increases
Solution Approach 1:
The filtration function is segmented into two stages: the threshold member with larger apertures handles initial runoff and coarse sediment removal, maintaining high water flow rates, while the filter member with smaller apertures captures fine sediment particles. This staged segmentation allows the system to achieve effective fine sediment filtration without excessively restricting overall water flow, as the larger apertures upstream compensate for the resistance introduced by the finer filter.
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 SCD effectively retards sediment transfer by allowing controlled water flow while preventing sediment from entering or leaving defined areas, making it suitable for construction sites and landscaping applications.
Implementation Method 1
an elongate filter member between the threshold and outflow members, the relatively small apertures being smaller than the relatively large apertures
Implementation Method 2
The SCD effectively retards sediment transfer by allowing controlled water flow while preventing sediment from entering or leaving defined areas
Data Source
AI summary
Sediment control devices (SCDs) include an apertured threshold member and an apertured outflow member, and optionally a filter member between the threshold and outflow members. In some SCDs1 the outflow member has a smaller aperture size than the threshold member, or vice versa. In some SCDs, a filter is placed in front of the threshold member. In some SCDs, there is a substantially hollow sediment control chamber (SCC) between the threshold and outflow members; in others, there is little or no hollow space between the threshold and outflow members. The SCDs can be constructed so that they are resistant to damage by wheeled traffic. The SCDs can be used to control sediment in run-off from a construction site, as drain covers, or as retaining members for lawns or planting areas. A number of SCDs can be joined together to form assemblies which are useful for stabilizing a land mass, for example a gully or river bank.