Slotted Drain Conduit for Surface Water Management
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Solution Overview
Problem
Conventional surface drainage systems are costly and difficult to install, prone to cracking due to thermal expansion differences, and pose hazards to pedestrians with unsightly and clogged grates, while slotted drains are expensive and have alignment issues.
Innovation Solution
A surface drainage system featuring an elongate drain conduit with slots extending through its wall, integrated into a pavement layer with a drainage channel, allowing for gravitational flow without large grates, and a method of constructing this system by forming a trench, placing the conduit, and cutting channels and slots in the pavement layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional open-top conduits are used, then water drainage is effective, but installation is difficult and costly due to support members being permanently embedded
Solution Approach 1:
The conduit body and support function are merged into a single integrated component. The corrugated sides of the conduit provide both structural support and positioning features, eliminating the need for separate support members that would be permanently embedded in the pavement.
Solution Approach 2:
The conduit is self-supporting through its corrugated structure and self-positioning features. The interlocking mechanism allows the conduit to maintain its own position without requiring external support members, making the system self-sufficient during installation.
2Reliability
If large grates are installed to cover conduit openings, then debris prevention and load support are achieved, but pedestrian safety deteriorates and visual appearance worsens
Solution Approach 1:
The hazardous grate component is completely removed from the system. The conduit openings are designed to be small enough to prevent debris entry and pedestrian injury without requiring any covering grate, extracting the problematic element while maintaining the necessary protective functions.
Solution Approach 2:
Instead of covering large openings with grates to prevent debris entry, the approach is inverted by making the openings themselves small and slot-like. This eliminates the need for grates while maintaining debris prevention, turning a harmful feature (large openings requiring grates) into a beneficial one (small openings needing no coverage).
3Ease of operation
If slotted drains with specialized construction are used, then grate installation is eliminated, but manufacturing cost increases and concrete cracking occurs due to thermal expansion differences
Solution Approach 1:
The conduit is made from the same concrete material as the surrounding pavement, creating a homogeneous structure. This eliminates thermal expansion differences between dissimilar materials, preventing concrete cracking while maintaining the grate-free slot design.
Solution Approach 2:
The conduit incorporates a corrugated structure with interlocking features that combine structural support and positioning functions. This composite design achieves the grate-free advantage without requiring specialized expensive construction, using formable concrete with enhanced structural properties.
4Device complexity
If conduits are defined by pavement forms, then installation is simplified, but production cost and time increase due to form installation and removal
Solution Approach 1:
The conduit positioning features and support structures are pre-formed as integral parts of the conduit body during manufacturing. This preliminary action eliminates the need for time-consuming form installation and removal on-site, as the conduit arrives ready-to-install with all positioning and support features already in place.
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
This solution reduces installation complexity, minimizes peripheral components, enhances pedestrian safety, and reduces visual impact while maintaining effective water drainage without the costly and hazardous issues of traditional systems.
Implementation Method 1
In order to facilitate gravitational flow, the pavement surface may be slightly sloped
Data Source
AI summary
A surface drainage structure formed above a subgrade may include an elongate drain conduit disposed partially within the subgrade. The elongate drain conduit may define at least one drain slot extending through a wall thereof. The structure may include a pavement layer with an exposed top surface and a drainage channel extending therefrom. The drainage channel may be in fluid communication with the drain slot of the elongate drain conduit. A method of forming the surface drainage structure includes placing the elongate drain conduit in the subgrade, forming the pavement layer, cutting an upper channel along the elongate drain conduit, and cutting a lower channel and the drain slot in the elongate conduit.