Road Shoulder Apparatus for Aggregate Compaction and Rut Prevention
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Solution Overview
Problem
Road shoulders made of granular aggregate materials are prone to rutting and instability due to uneven compaction, and require costly and time-consuming maintenance to address issues like debris and vegetation, leading to frequent deterioration and destabilization from water erosion.
Innovation Solution
A deployable retractable apparatus for self-propelled machines that engages, disrupts, and compacts granular aggregate materials from the road shoulder onto the surface, transfers them back, and distributes them evenly for stable compaction, using components like discs, ploughshares, and rollers to manage debris and vegetation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If motor graders and self-propelled vibratory compacting rollers are used to work and compact road shoulders, then the road shoulders can be compacted to support vehicle weights, but the freshly worked granular aggregate materials are very soft and susceptible to forming deep ruts from equipment wheels, resulting in uneven compacting and poor shoulder stability
Solution Approach 1:
The apparatus performs preliminary action by distributing granular aggregate materials onto the road surface before compaction, creating a stable base layer that prevents rutting during subsequent grooming and compaction operations. This preliminary material distribution ensures that equipment wheels do not create deep ruts in soft materials, thereby maintaining shoulder stability while achieving proper compaction.
2Ease of manufacture
If motor grader mouldboards are used to move spilled or excess granular substrates from road surfaces to shoulders, then the road shoulders can be formed, but the mouldboards cause gouging, tearing or ripping of the newly paved or poured road surfaces, significantly reducing their durability and longevity
Solution Approach 1:
The invention extracts the harmful function of mouldboards from the road shoulder formation process. Instead of using mouldboards that gouge and tear road surfaces, the apparatus uses a separate material distribution system that places granular aggregate materials directly onto the road surface without contact with the paved surface, thereby eliminating damage while still achieving proper shoulder formation.
3Reliability
If multiple specialized self-propelled equipment such as motor graders with demountable devices are used for road shoulder reclaiming and reforming operations, then washed away substrates can be recovered and transferred back onto the road shoulder, but these operations require at least two or more separate passes and are costly and time-consuming
Solution Approach 1:
The invention merges multiple road shoulder working functions into a single integrated apparatus that can be mounted on one self-propelled machine. The combined system performs material distribution, grooming, and compaction operations in a single pass, eliminating the need for multiple specialized equipment and separate operations, thereby significantly improving productivity while maintaining reliable road shoulder recovery.
4Adaptability or versatility
If debris and vegetation are pulled in clumps onto road surfaces during shoulder recovery operation and redistributed across new shoulder surfaces, then the debris is incorporated into the shoulder, but this results in uneven compaction, creating unstable road shoulders that quickly deteriorate and require more frequent maintenance
Solution Approach 1:
The invention applies local quality by creating distinct zones with different material compositions. Clean granular aggregate materials are distributed onto the road surface in a controlled manner, while debris and vegetation are excluded from the compacted shoulder area. This localized material placement ensures uniform compaction and stable shoulder construction, while still allowing for necessary debris removal and disposal.
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 apparatus ensures densified substrates for road shoulders, reducing maintenance needs and enhancing durability and safety by providing stable and even compaction, while minimizing damage to newly paved surfaces and improving resistance to water erosion.
Implementation Method 1
self-propelled vibratory compacting rollers
Implementation Method 2
augering roller for distributing and grooming road shoulders
Data Source
AI summary
A road shoulder working, grooming and compacting apparatus is configured to demountably cooperate with self-propelled operator-controlled machines. The apparatus comprises a first component for controllably working an outer portion of a road shoulder region to urge granular aggregate materials therefrom toward and onto a road surface, a second component positioned posterior to the first component and vertically movable between disengaged and engaged positions for controllably transferring granular aggregate material from a road surface to a road shoulder region, and a third component positioned posterior the second component for controllably distributing, grooming and compacting granular aggregate materials contained within the road shoulder region. The first and third components are movable between raised retracted positions and laterally-deployed lowered positions for engaging and working road shoulder regions while the self-propelled operator-controllable machine travels along a road surface. A fourth component is optionally provided interposed the second and third components for brushing road surfaces.