Mobile Soil Treatment Apparatus for Road Stabilization
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Solution Overview
Problem
The maintenance of lower-grade roads in Finland is hindered by reduced funding, increased traffic load, and frost heave issues, leading to structural deterioration and bearing capacity problems, which traditional stabilization methods using cement have not adequately addressed.
Innovation Solution
A movable apparatus that removes soil from the road surface, treats it with binders to enhance compression strength, and returns the stabilized soil to the original location, utilizing industrial side-stream materials and wastes to form geopolymeric mixtures, thereby stabilizing the road structure without adding new natural stone materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional stabilization methods using cement are applied to improve bearing capacity, then the compression strength of soil is improved, but the cost and environmental impact increase due to material transport and disposal of old material
Solution Approach 1:
The patent removes old road material and soil, treats it with binders in a mobile plant, and reuses it as stabilization material for the road structure. This closed-loop approach recovers valuable materials that would otherwise be discarded, eliminating the need for new material extraction and transport while reducing waste disposal requirements
Solution Approach 2:
The mobile treatment plant performs multiple functions: removing old material, treating it with binders, and producing stabilized material for road reconstruction. This multi-functional approach consolidates several operations into a single system, improving efficiency and reducing the need for separate material transport operations
2Stability of the object's composition
If thick structural layers are used to solve bearing capacity and frost heave problems, then the road structure stability is improved, but the material consumption and natural resource usage increase
Solution Approach 1:
The patent changes the chemical and physical parameters of the existing soil and road material by treating it with binders in the mobile plant. This transformation improves the mechanical properties and bearing capacity of the material, allowing for thinner structural layers to achieve the same stability as thicker traditional layers would provide
Solution Approach 2:
The patent creates composite materials by combining existing road material and soil with binders produced in the mobile plant. This composite approach enhances the structural properties of the material, providing improved bearing capacity and frost resistance while reducing the quantity of material needed compared to traditional homogeneous structures
3Strength
If cement is used as stabilizing binder to improve bearing capacity of gravel roads, then the compression strength is improved, but the cost and logistical efficiency decrease
Solution Approach 1:
The mobile treatment plant is positioned directly at the road site and produces binders on-demand using local materials and resources. This self-service approach eliminates the need for transporting cement from external sources and reduces dependency on external supply chains, improving both cost efficiency and logistical responsiveness
Solution Approach 2:
The mobile plant acts as an intermediary between the existing road materials and the final stabilized structure. It processes local materials into binders and stabilization agents right at the site, mediating the transformation of available resources into functional construction materials without requiring extensive external material transport
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
This method provides a cost-efficient, environmentally friendly, and logistically efficient solution for road refurbishment and construction, improving the bearing capacity and geotechnical properties of the treated soil, allowing for the stabilization of both new and existing road structures in a single operation.
Implementation Method 1
at least one binder is fed to the soil... the binder-treated mass is spread back to the ground surface... utilizing industrial side-stream materials and wastes to form geopolymeric mixtures, thereby stabilizing the road structure
Data Source
Figure 1~2
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Figure 5~6
AI summary
Apparatus and method of treating soil. The apparatus (24) is a movable vehicle (25) having a blade device (26) for removing the soil. The removed soil is transferred into a loading space (28) in which the soil is homogenized. One or more binders are mixed to the soil, after which it is taken back to ground by a spreading device (34). Stabilization of the soil is thus carried out in the movable apparatus.