Shape-Retaining Hoist Bag for High-Aspect Ratio Soil Compaction
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Solution Overview
Problem
Conventional shape-retaining rectangular parallelepiped bags with a small aspect ratio and large height are prone to tearing and deformation when lifted, as they cannot compact soil particles effectively in the vertical direction, leading to instability and increased construction costs due to the need for special machinery and lengthy solidification times.
Innovation Solution
A shape-retaining hoist type rectangular parallelepiped bag design featuring a bottom surface holding mechanism with diagonal hanging bodies and a side surface holding mechanism with rotated side surface restriction bodies, which apply tensile forces in different directions to compact accommodated objects uniformly, reducing the likelihood of deformation and allowing for a larger height without tearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the bag height is increased to reduce the number of stacks, then productivity is improved, but the bag becomes prone to tearing and deformation due to excessive shear forces on side surfaces
Solution Approach 1:
The internal restriction tool is segmented into multiple components: a central hanging body and multiple radially arranged hanging bodies connected to it. This segmentation distributes the load-bearing function across multiple elements, preventing excessive stress concentration on any single side surface while enabling greater bag height.
Solution Approach 2:
The restriction mechanism transitions from a two-dimensional planar structure to a three-dimensional radial structure extending vertically from the bottom surface. The hanging bodies are arranged radially and extend upward, creating a spatial configuration that provides support in multiple directions and reduces shear forces on side surfaces.
2Productivity
If the bag height is increased to reduce stacking, then productivity is improved, but manufacturing precision deteriorates due to difficulty in maintaining uniform shape
Solution Approach 1:
The hanging bodies are positioned at specific locations around the central hanging body, with their one ends connected to the central body and other ends extending toward the side surfaces. This localized arrangement provides targeted support at critical points, ensuring uniform shape maintenance throughout the bag height.
Solution Approach 2:
The restriction tool extends into the vertical dimension with hanging bodies arranged radially around the central hanging body. This three-dimensional configuration provides uniform radial support that maintains shape consistency throughout the entire height of the bag, preventing deformation during lifting and placement.
3Ease of manufacture
If conventional flat bags are used, then ease of manufacture is maintained, but load bearing capability is insufficient for deep layer ground improvement
Solution Approach 1:
The internal restriction tool introduces a vertical dimension to the previously planar structure. The central hanging body and radially arranged hanging bodies extend upward from the bottom surface, creating a three-dimensional support framework that significantly enhances load bearing capability while maintaining manufacturing simplicity through the use of flexible fabric and straightforward assembly.
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 design enhances the bag's ability to compact soil particles uniformly, reducing the aspect ratio and likelihood of deformation, enabling efficient soil reinforcement with reduced construction time and costs by allowing for higher stacks and improved load-bearing capacity.
Implementation Method 1
a bottom surface holding mechanism configured to hold a bottom surface by application of a tensile force thereto; a side surface holding mechanism configured to hold a side surface by application of a tensile force thereto
Data Source
AI summary
A shape-retaining hoist type rectangular parallelepiped bag includes: a rectangular parallelepiped bag that is a generally rectangular parallelepiped-shaped bag that has an internal space to accommodate an accommodated object; a bottom surface holding mechanism configured to hold a bottom surface by application of a tensile force thereto; a side surface holding mechanism configured to hold a side surface by application of a tensile force thereto; a central hanging body configured to extend in a vertical direction with one end thereof being fixed to a center of the bottom surface of the rectangular parallelepiped bag and hold the bottom surface holding mechanism and the side surface holding mechanism at intermediate positions in the vertical direction; and a ring-shaped hook holding portion connected to the other end of the central hanging body, to which a hook is to be attached. This provides a rectangular parallelepiped bag that is less likely to tear despite its small aspect ratio and large height, can compact soil particles by stages in its height direction, has a stable strength even when the bag has a large height as in a case where the bag has a ratio between a height and a width of the bag exceeding 1:1, for example, and is less likely to be deformed when lifted upwardly in the vertical direction.