Polymeric Waterproofing Membrane With Dense Stud Drainage Layout
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Solution Overview
Problem
Existing geomembrane products for landfills have poor drainage flow characteristics due to widely spaced and short protrusions, limiting their load-bearing capacity to less than 5.00 psf (23 kPa) and flow rates to 2.5×10−3 m2/sec, failing to meet the increased demands for higher load capabilities and flow rates.
Innovation Solution
An improved geomembrane design with denser stud placement (8,000 to 12,000 studs per meter squared) and optimized stud dimensions (4 to 6 mm height, 2.5 to 4.0 mm diameter, and 0.1 to 1.8 mm root radius) to enhance load-bearing capacity (1,500 to 15,000 psf or 23 to 720 kPa) and flow rates, achieved through extrusion and calendaring processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If stud density is increased from 4000-6000 to 8000-12000 studs per meter squared, then load-bearing capacity increases from less than 500 psf to 1500-15000 psf, but manufacturing complexity increases
Solution Approach 1:
The patent changes the stud density parameter from 4000-6000 to 8000-12000 studs per meter squared, which directly increases load-bearing capacity. It also modifies stud dimensions (height 4-6 mm, diameter 2.5-4.0 mm, root radius 0.1-1.8 mm) to optimize both structural strength and drainage functionality, resolving the contradiction between increased strength and manufacturing complexity through systematic parameter optimization.
2Productivity
If stud height is increased from 2.5-4.5 mm to 4-6 mm, then flow rate increases by six times, but manufacturing precision requirements increase
Solution Approach 1:
The patent increases stud height from 2.5-4.5 mm to 4-6 mm, which creates larger drainage channels and six times the flow capability. This parameter change is accompanied by optimized root radius (0.1-1.8 mm) to ensure proper stress distribution and manufacturing feasibility, thereby achieving high flow rates while maintaining reasonable manufacturing precision standards.
3Productivity
If stud spacing is reduced from widely spaced to 6-12 mm in all dimensions, then drainage efficiency improves, but material consumption increases
Solution Approach 1:
The patent applies local quality by creating a non-uniform stud distribution pattern where studs are strategically positioned to maximize drainage efficiency in critical areas. The stud spacing of 6-12 mm in row, column, and diagonal dimensions provides uniform drainage coverage while the varied root radii (0.1-1.8 mm) optimize stress distribution, achieving high drainage efficiency with optimized material utilization.
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 new design achieves six times the flow rate and load-bearing capacity compared to previous products, supporting loads up to 15,000 psf (720 kPa) with improved stud spacing and dimensions, enhancing drainage efficiency.
Implementation Method 1
The geomembrane may include a substrate, at least two studs on the substrate... achieved through extrusion and calendaring processes
Implementation Method 2
cooling the molten polymer to solidify the molten polymer into a substrate
Data Source
AI summary
Described herein are systems and methods for forming an improved Drainliner Max with improved load bearing capability in the range of 500-15,000 or 23 to 720 kPA via improved stud placement and improved height/diameter dimensions to provide a much improved product that vastly outperforms existing systems.