Pretensioned Ground Shaft Side Walls for Vehicle Load Resistance
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Solution Overview
Problem
Conventional ground shafts, especially those made of plastic, face mechanical instability due to lateral loads from vehicles, which can cause deformation and damage, as they struggle to withstand being run over and convert vertical stresses into horizontal stresses.
Innovation Solution
A ground shaft design featuring a frame configuration with metal tensioning portions that counteract deformation forces by pretensioning the structure, enhancing load-bearing capacity by using a combination of plastic and metal components to anchor and adjust the frame's walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If ground shafts are made of plastic to reduce weight and cost, then manufacturing cost and weight are reduced, but mechanical stability and load-bearing capacity deteriorate under lateral loads
Solution Approach 1:
The ground shaft combines plastic longitudinal wall portions with metal tensioning portions to create a composite structure. The plastic provides cost-effective, lightweight construction while the metal tensioning portions provide the necessary strength and stiffness to resist lateral loads and prevent deformation, resolving the contradiction between manufacturing cost and load-bearing capacity.
2Weight of moving object
If ground shafts are made of plastic to reduce weight, then weight is reduced, but mechanical stability under vehicle loads deteriorates
Solution Approach 1:
The hybrid plastic-metal construction maintains the weight advantage of plastic while incorporating metal tensioning portions that provide the structural integrity and reliability needed to withstand vehicle loads and lateral stresses, preventing deformation and ensuring mechanical stability.
Solution Approach 2:
The metal tensioning portions are pre-tensioned to create initial compressive forces in the plastic wall portions. This preliminary anti-action counteracts the deformation forces from lateral loads before they occur, maintaining mechanical stability while keeping the overall structure lightweight.
3Device complexity
If conventional plastic side walls are used to simplify construction, then device complexity is reduced, but resistance to deformation forces deteriorates
Solution Approach 1:
The ground shaft is divided into plastic longitudinal wall portions and separate metal tensioning portions. This segmentation allows each component to be optimized for its specific function while maintaining relatively simple construction. The metal tensioning portions can be independently adjusted to provide the necessary deformation resistance without complicating the overall construction process.
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 enhanced load-bearing capacity of the ground shaft prevents deformation and structural damage from lateral loads, ensuring stability and durability even under vehicle traffic and lateral stress conditions.
Implementation Method 1
the tensioning portion may be configured to include an adjusting portion that is structurally configured to pretension the tensioning portion
Implementation Method 2
The tensioning portion may be structurally configured to counteract a deformation force acting on an exterior side portion of the first longitudinal wall in a direction toward an interior of the ground shaft
Data Source
AI summary
A frame portion may be configured to provide enhanced load-bearing capacity for a ground shaft that is configured to delimit a cavity. The frame portion may include a first longitudinal wall portion and a second longitudinal wall portion, and a first lateral wall portion and a second lateral wall portion configured to be coupled with the first longitudinal wall portion and a second longitudinal wall portion. At least a portion of the first longitudinal wall portion may comprise plastic. The first longitudinal wall portion may include a tensioning portion structurally configured to counteract a deformation force acting on an exterior side portion of the first longitudinal wall in a direction toward an interior of the frame portion so as to enhance load-bearing capacity of the first longitudinal wall portion.