Modular Utility Duct Structure for Roadway Access and Repair
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Solution Overview
Problem
Existing methods for accessing utility lines under roadways and footways are cumbersome, invasive, and expensive, requiring significant reconstruction of pavement for repairs or replacements.
Innovation Solution
A modular duct system formed from polymer material with interlocking paving blocks and granular base material, allowing for easy assembly and disassembly, and featuring removable brackets to hold utility lines, facilitating quick installation and maintenance without extensive pavement disruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If utility lines are enclosed in a permanent concrete duct under roadway, then structural strength and protection are improved, but ease of repair and accessibility deteriorate
Solution Approach 1:
The duct system is divided into modular sections that can be independently accessed and repaired. The roadway surface is segmented into removable pavers that provide access to the duct without requiring destruction of the entire pavement structure.
Solution Approach 2:
The duct cover transitions from a fixed permanent structure to a dynamic removable structure. The cover can be taken off and replaced to allow access to utility lines for maintenance while maintaining structural integrity during normal operation.
2Ease of operation
If roadway pavement is cut to access utility lines, then accessibility to utility lines is improved, but loss of time and reconstruction effort increase
Solution Approach 1:
The duct cover is pre-designed with removable sections and associated access mechanisms are prepared in advance. The interlocking pavers are pre-positioned to quickly restore the roadway surface after utility line access, eliminating the need for time-consuming pavement reconstruction.
3Reliability
If traditional concrete encasement is used, then protection of utility lines is improved, but cost and invasiveness of installation increase
Solution Approach 1:
The encasement is segmented into modular components including separate duct sections, removable covers, and interlocking pavers. This modularity reduces material costs, simplifies installation, and allows for easier maintenance compared to monolithic concrete construction.
Solution Approach 2:
The material parameters are changed from traditional concrete to alternative materials that offer comparable or superior protection with reduced installation complexity and cost. The system allows for parameter adjustments in terms of material selection, structural configuration, and access mechanisms.
Data Source
AI summary
A system for enclosing a utility line under a roadway or footway includes a plurality of modular walls formed from a polymer material, wherein the modular walls combine to form a duct unit defining an interior volume therewithin and having open axial ends. The system further includes a polymer plate overlaying the duct unit, a quantity of granular base material overlaying the polymer plate, and a plurality of interlocking paving blocks overlaying the granular base material, wherein the plurality of paving blocks combine to form a surface for accommodating foot or vehicular traffic. Further, the system includes one or more brackets removably fixed in the duct unit for holding the utility line within the interior volume.