Plastic Drain Sheet With Crossed Grooves For High Pressure Stability
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Solution Overview
Problem
Existing methods for manufacturing plastic drain sheets fail to produce sheets that can withstand high pressure loads while maintaining sufficient water discharge capability and stability, as they often result in deformed structures that hinder flow paths and are not viable for geotechnical applications.
Innovation Solution
A method involving a sheet-like main body with grooves and mating grooves that cross each other at specific points, forming through-openings to create a stable and permeable plastic drain sheet with enhanced compressive and shear strength, allowing for high water discharge even under high pressure loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If geonets are used as plastic drain sheets for high pressure loading, then pressure load bearing capability is improved, but manufacturing complexity and cost increase due to specialized installations
Solution Approach 1:
The drain sheet is segmented into a sheet-like main body with integrated grooves and mating grooves that form through-openings at crossing points. This segmentation allows the product to achieve high pressure load bearing capability through its structural design while being manufacturable using conventional plastic processing equipment, eliminating the need for specialized geonet manufacturing installations.
2Productivity
If plastic film is stretched multiple times its length to create plastic nets, then productivity is improved, but the resulting nets are deformed and cannot form flow paths
Solution Approach 1:
Instead of stretching the plastic film to create the drain sheet structure (which causes deformation and prevents flow path formation), the invention inverts the approach by forming grooves and mating grooves into an unstretched sheet-like main body. This allows through-openings to be created at crossing points while maintaining the integrity of the plastic material and ensuring proper flow path formation, all without requiring multiple stretching operations.
3Productivity
If through-openings are formed at crossing points of grooves and mating grooves, then water discharge capability is improved, but structural stability may be compromised
Solution Approach 1:
The invention applies local quality by creating through-openings specifically at the crossing points of grooves and mating grooves, where the structural impact is minimized. The grooves and mating grooves are distributed throughout the sheet-like main body, providing structural reinforcement in regions between the openings. This localized approach to creating through-openings ensures adequate water discharge capability while maintaining overall structural stability.
Data Source
AI summary
The invention describes a method for manufacturing a plastic drain sheet, and a plastic drain sheet. For the purpose of manufacture, a sheet-like main body having a first surface and a second surface, spaced apart therefrom by a base sheet thickness, is provided. Grooves are introduced into the first surface and mating grooves are introduced into the second surface. The mating grooves and the grooves cross one another at crossing points. Through-openings between the grooves and the mating grooves are formed at the crossing points.