Corrugated Water Storage Chamber Flange Locking for Wall Stability
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Solution Overview
Problem
Plastic storm water chambers experience reduced rigidity due to solar heating, causing the upstanding side walls to spread apart during installation, leading to deformation or collapse when crushed stone is added.
Innovation Solution
The chambers are designed with flanges at each end, featuring protrusions and apertures that snap or lock together, doubling the thickness of the sidewalls and preventing separation, and stacking lugs to prevent nesting issues during storage and transit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If plastic chambers are used to replace concrete structures, then installation ease and weight are improved, but structural rigidity deteriorates under solar heating
Solution Approach 1:
Multiple chambers are connected end-to-end through flange connections, merging their structural strength. The flange at the end of one chamber engages with the flange of the next chamber, creating a continuous load-bearing path that distributes stresses across multiple chambers, thereby maintaining structural rigidity while using lightweight plastic material.
Solution Approach 2:
The flange connection extends the structural reinforcement into a new dimensional configuration. By adding the flange structure perpendicular to the main chamber body, the design creates a multi-dimensional load distribution system that enhances rigidity without increasing the chamber's primary dimensions or weight.
2Stability of the object's composition
If chambers are connected end-to-end, then system continuity is improved, but side wall separation worsens under load
Solution Approach 1:
The flange connection is designed with protrusions and apertures that interlock before the chamber is fully loaded. This preliminary mechanical engagement prevents side wall separation from occurring in the first place, rather than attempting to correct it after deformation begins. The connection is established in advance to maintain side wall stability under subsequent loads.
Solution Approach 2:
The chamber end structure is segmented into distinct functional elements: the flange, protrusions, and apertures. This segmentation allows each element to perform its specific function - the flange provides the connection interface, protrusions provide mechanical engagement, and apertures allow for alignment and load distribution - collectively preventing side wall separation while maintaining system continuity.
3Volume of moving object
If chamber size is increased for greater storage capacity, then water handling capability is improved, but load bearing stress worsens
Solution Approach 1:
The flange connection adds a dimensional element perpendicular to the chamber body, creating a distributed load path. This multi-dimensional structure allows larger chambers to bear loads more effectively by spreading stresses across the flange connection and into adjacent chambers, rather than concentrating all load on the chamber body alone.
Solution Approach 2:
Multiple chambers are merged through flange connections to form a continuous load-bearing system. When one chamber experiences high load, the stress is distributed to neighboring chambers through the flange connection, effectively reducing the load bearing stress on any single large chamber while maintaining the system's total storage capacity.
Data Source
Figure 1
Figure 1A
Figure 1B
AI summary
A water detention chamber, and a system constructed from multiple such chambers, is an arch-shaped corrugated chamber having a flange having an upper surface and a lower surface. The lower surface of the flange has one or more protrusions, preferably elongated members, at the first end of the chamber. The upper surface of the flange has one or more mating apertures or cavities formed therein. Multiple such chambers can be connected to each other in an end-to-end fashion with protrusions at the first ends of a chamber engaged with apertures or cavities at the second ends of a second chamber.