Aerated Tree Pit with Permeable Pipe and Fan
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Solution Overview
Problem
Urban trees in tree pits alongside roads and paved areas face inadequate protection, leading to limited air exchange and reduced effectiveness in air pollution removal, resulting in shorter tree lifespans and increased replacement costs.
Innovation Solution
An aerated tree pit design with anti-soil-compaction means, an air inlet connected to a permeable pipe system, and an outlet mechanism, such as a fan or impeller, to enhance air flow through the soil and root zone, facilitating improved gaseous exchange and pollutant removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional tree pits are used with limited air space above soil and beneath paving, then the structure is simple and cost-effective, but air flow to the soil/root system is very limited and the soil/root system capacity to be utilised as an air cleaner is limited
Solution Approach 1:
The tree pit structure is segmented into multiple functional zones: anti-soil-compaction means with permeable sidewalls and base, permeable pipe system embedded within, separate air inlet and outlet positions, and distinct root ball containment area. This segmentation allows each component to perform its specific function optimally while collectively enhancing air flow and pollution removal capacity.
Solution Approach 2:
The invention applies pneumatic principles by introducing a forced air flow system through the permeable pipe structure. Air is actively drawn through the soil and root zone using pressure differentials created by the inlet/outlet configuration, enhancing gaseous exchange and pollutant removal beyond natural diffusion capabilities.
2Duration of action of stationary object
If urban trees are placed in traditional tree pits alongside roads, then the trees provide some shade and visual benefit, but the trees do not survive for long due to inadequate protection and limited air exchange
Solution Approach 1:
The anti-soil-compaction means with permeable sidewalls and base provide beforehand protection to the root system. This structure cushions the roots against soil compaction from overhead paving and vehicle loads, while the permeable design ensures adequate air supply is established before the tree encounters stress conditions that would otherwise cause failure.
Solution Approach 2:
The anti-soil-compaction means incorporates permeable porous structures in its sidewalls and base, allowing air to pass through while providing mechanical protection. This porous design enables dual functionality: structural support/protection and enhanced aeration, directly improving tree survival reliability.
3Reliability
If anti-soil-compaction apparatus is added to protect tree roots, then root protection is improved, but air flow through the soil/root system remains limited without active aeration
Solution Approach 1:
The invention merges the protective function of anti-soil-compaction means with the aeration function of the permeable pipe system. These previously separate functions are combined into an integrated structure where the permeable sidewalls and base of the anti-soil-compaction apparatus serve as both protective barriers and air flow conduits, simultaneously improving root protection and air exchange productivity.
Solution Approach 2:
The anti-soil-compaction means utilizes porous permeable materials in its sidewalls and base structure. This allows the protective apparatus to simultaneously perform mechanical protection and facilitate air flow through the soil and root zone, resolving the contradiction between protection effectiveness and air exchange rate.
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 aerated tree pit design enhances air exchange, improving the trees' ability to remove pollutants like Nitrogen dioxide and particulates, thereby extending tree lifespan and maintaining environmental benefits while reducing maintenance and replacement costs.
Implementation Method 1
walls of said pipe are adapted to provide fluid communication between an inside and an outside of said pipe. Preferably said pipe walls include openings. Preferably said pipe walls are perforated. Preferably said pipe walls are permeable.
Implementation Method 2
means to urge air to pass from said inlet to said outlet and passing through said sidewalls and/or base providing for aeration of said tree pit. Preferably said mechanism is an impeller, and/or a fan.
Implementation Method 3
increased gaseous exchange in the tree or plant rootzone, to facilitate enhanced air pollution removal
Data Source
Figure 1
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AI summary
An aerated tree pit comprising a tree pit (11) including at least one anti-soil-compaction means (17) with sidewalls and a base, an air inlet (25) in fluid communication with the atmosphere and said sidewalls and/or base, an outlet (31) in fluid communication with said sidewalls and base, and with the atmosphere, means (35, 39) to urge air to pass from said inlet (25) to said outlet (31) and passing through said sidewalls and/or base providing for aeration of said tree pit (11).