Highway Sponge-Type Composite Side Ditch Carbon Neutralization
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Solution Overview
Problem
Current technologies for highways lack effective solutions for achieving carbon neutralization throughout the life cycle, particularly in the context of runoff management and pollution control.
Innovation Solution
A highway sponge-type composite side ditch system is designed, comprising a silt pre-sedimentation channel, a filtering and oil-absorbing channel, and an ecologic purification channel, which work together to collect, purify, and utilize highway runoff, incorporating natural materials and vegetation for carbon sink enhancement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional side ditch structures are used for runoff collection and drainage, then the basic drainage function is achieved, but carbon neutralization throughout the life cycle cannot be achieved and pollutant removal efficiency is insufficient
Solution Approach 1:
The side ditch system is divided into three functional segments: a silt pre-sedimentation channel for initial pollutant removal, a filtering and oil-absorbing channel for intermediate treatment, and an ecologic purification channel for final purification and carbon sink functions. Each segment handles specific pollutants through dedicated mechanisms, achieving comprehensive pollution control while maintaining manageable structural complexity through functional modularity.
Solution Approach 2:
The side ditch system performs multiple functions simultaneously: runoff collection, sedimentation, filtration, oil absorption, biological purification, carbon sink accumulation, and emergency leakage containment. The ecologic purification channel serves both as a treatment medium and a carbon sink system, while the impermeable layer provides both pollution prevention and emergency response capabilities. This multi-functionality resolves the contradiction by achieving comprehensive pollutant removal without proportionally increasing structural complexity.
2Reliability
If natural materials and vegetation are incorporated for carbon sink enhancement, then carbon neutralization is achieved, but construction complexity and material selection difficulty increase
Solution Approach 1:
Carbon sink vegetation and natural materials are selected and prepared in advance during the design phase, with specific species chosen based on local climate and soil conditions. The ecologic purification channel is pre-configured with appropriate vegetation layers and natural filtering materials, allowing for standardized construction procedures that reduce on-site decision-making complexity while ensuring carbon neutralization effectiveness is achieved from the outset.
3Object-affected harmful factors
If multiple purification channels are connected in sequence, then comprehensive pollutant removal is achieved, but the length and space required for the system increase
Solution Approach 1:
The side ditch system transitions from traditional linear longitudinal drainage to a three-dimensional structure that incorporates vertical layering within each channel segment. Multiple purification functions are stacked vertically within compact horizontal footprints, allowing comprehensive pollutant removal through sequential treatment while minimizing the overall length and space required for the system along the highway corridor.
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 system effectively removes pollutants from highway runoff, achieves carbon neutralization throughout its life cycle, and provides a sustainable solution for runoff management, emergency leakage handling, and landscape enhancement.
Implementation Method 1
a silt pre-sedimentation channel 2, used for removing suspended solids and silt in the runoff through sedimentation
Implementation Method 2
a filtering and oil-absorbing channel 3, in which a second filtering layer 17, a first filtering layer 16 and an oil-absorbing fiber layer 15 are arranged from bottom to top
Implementation Method 3
an oil-absorbing fiber layer 15 are arranged from bottom to top, used for removing oil in the runoff through adsorption
Implementation Method 4
an ecologic purification channel 4, in which a modified volcanic rock layer 18, a sawdust layer 19, a modified ceramsite layer 20, a configured planting soil layer 21 and carbon sink vegetation 22 are arranged from bottom to top, used for deep purification of the runoff through biodegradation
Implementation Method 5
carbon sink vegetation 22 are arranged from bottom to top, used for deep purification of the runoff through biodegradation, medium adsorption and plant absorption
Implementation Method 6
a modified volcanic rock layer 18, a sawdust layer 19, a modified ceramsite layer 20, used for deep purification of the runoff through biodegradation, medium adsorption and plant absorption
Data Source
AI summary
The highway sponge-type composite side ditch carbon neutralization system of the present invention includes three units, i.e., a silt pre-sedimentation channel, a filtering and oil-absorbing channel and an ecologic purification channel which are connected horizontally and successively. These three units work together to jointly complete the low-impact development functions of runoff collection, guide and drainage, purification and utilization, carbon emission is reduced by adopting various technical measures, the carbon sink effect is improved, and the full-life-cycle carbon neutralization effect from raw material production, construction to operation can be realized.