Portable U-Shaped Cofferdam for Rapid Culvert Inlet Isolation

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Solution Overview

Problem

Conventional cofferdams are labor-intensive and time-consuming to install, and not designed for smaller work environments such as the area surrounding a culvert inlet.

Innovation Solution

A portable cofferdam system comprising a first and second sidewall with a middle wall forming a U-shaped structure, allowing easy installation and use in smaller areas, with connectors for lifting and moving, and a support member for additional support during operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional cofferdams are used, then water-tight enclosure is achieved, but installation becomes labor-intensive and time-consuming

Engineering Contradiction:
Improvewater-tight enclosureVSAvoidinstallation speed
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The cofferdam system is divided into multiple modular panels that can be independently manufactured and assembled. Each panel includes integrated connection features allowing rapid assembly without complex welding or bolting operations, thus maintaining water-tight enclosure while significantly reducing installation time and labor requirements

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Connection elements, sealing features, and structural components are pre-assembled or pre-positioned on each panel during manufacturing. This preliminary preparation eliminates on-site assembly complexity and enables quick deployment of the complete cofferdam structure, resolving the contradiction between reliable enclosure and fast installation

Inventive Principle:
Principle #10Preliminary action

2Strength

If conventional cofferdams are used, then structural strength is achieved, but adaptability to smaller work environments is reduced

Engineering Contradiction:
Improvestructural strengthVSAvoidadaptability to smaller areas
Core Design Contradiction:
StrengthVSAdaptability or versatility

Solution Approach 1:

The cofferdam is constructed from standardized modular panels that can be configured in various sizes and shapes. For smaller work environments like culvert inlets, fewer panels are assembled in a compact arrangement, maintaining structural strength through proper connection design while adapting to limited space requirements

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The same modular panel design serves multiple functions and scales to different application sizes. Panels can be arranged to enclose small culvert inlets or larger construction areas, with connection systems that maintain structural integrity across different configurations, thus achieving both strength and adaptability

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250327262A1Portable Cofferdam System
Publication Date: 2025.10.23 SUBSURFACE INC
  • US20250327262A1 patent drawing
  • US20250327262A1 patent drawing
  • US20250327262A1 patent drawing

AI summary

A portable cofferdam system for isolating a working area from water such as a culvert. The portable cofferdam system generally includes a first sidewall and a second sidewall each having an interior side, an exterior side, an upper edge, a lower edge and a rear edge. A middle wall is connected to the sidewalls opposite of the rear edges of the sidewalls forming a substantially U-shaped structure. An opening formed between the rear edges of the first sidewall and the second sidewall to allow for positioning about or near the inlet of an object or area to be kept dry such as the inlet of a culvert.