Soil Compacting Device Bottom-Up Inversion
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Solution Overview
Problem
Current soil compaction methods are limited in achieving uniform density throughout the thickness of a layer, especially in deeper sections, leading to reduced layer thickness and lifetime in construction projects like road and railway foundations, and cannot compact beneath existing structures without disrupting them.
Innovation Solution
A soil compaction device is inserted at a specified depth and advanced while maintaining it, using wedge-shaped tools and blades with adjustable eccentricity to compact soil continuously, allowing for deeper and more uniform compaction without surface disruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If surface compaction methods are used to compact soil layers, then the upper part of the layer achieves satisfactory density, but the density decreases as depth increases and the layer thickness is limited to 30-35 cm
Solution Approach 1:
The patent inverts the conventional compaction approach by inserting the compaction device from the bottom of the layer upward through a pre-formed hole, rather than compacting from the surface downward. This allows the compaction force to be applied directly to the lower part of the layer, achieving uniform density throughout the entire thickness without the depth limitation of surface compaction methods.
Solution Approach 2:
The invention changes the dimension of compaction application by transitioning from vertical surface compaction to horizontal insertion compaction. The device is inserted horizontally through a hole and then advanced vertically while maintaining a constant insertion depth, compacting the soil layer from the bottom upward in a new spatial dimension that overcomes the depth limitations of traditional methods.
2Length of stationary object
If heavy vibrating equipments are used to increase layer thickness, then deeper compaction is achieved, but surface lamination occurs that is detrimental to long term structure performance
Solution Approach 1:
By inverting the compaction direction and applying force from the bottom upward, the patent avoids the surface lamination problem caused by heavy surface vibrators. The compaction energy is transmitted from the lower part of the layer, eliminating direct surface impact while still achieving deep compaction of the entire layer thickness.
3Ease of manufacture
If conventional surface compaction is used, then the compaction process is simple, but it is impossible to compact soil beneath existing structures like railways without removing tracks
Solution Approach 1:
The patent segments the compaction process into distinct phases: creating a pre-formed hole through the existing structure, inserting the compaction device through the hole, and advancing the device while maintaining constant insertion depth. This segmentation allows compaction beneath existing structures without removing them, significantly expanding application flexibility while maintaining operational simplicity through standardized procedures.
Solution Approach 2:
The pre-formed hole acts as an intermediary medium that enables the compaction device to access and compact soil beneath existing structures. This intermediary approach allows the device to be inserted through the hole and advance to the required depth without direct contact with or disruption to the existing structure above.
4Duration of action of stationary object
If the thickness of foundation layer is increased to improve lifetime, then higher compactness at layer bottom is achieved, but the number of layers increases and construction complexity increases
Solution Approach 1:
By inverting the compaction approach to work from the bottom upward, the patent achieves high compactness throughout the entire layer thickness in a single continuous operation. This eliminates the need to create multiple thinner layers to ensure adequate compaction at depth, reducing the total number of layers and simplifying construction while extending structure lifetime through improved compactness.
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
Enables higher compactness at the layer bottom, allowing for thicker road layers and reduced maintenance needs, as well as the ability to compact beneath existing structures like railways without removing tracks, thereby extending their lifespan and reducing construction downtime.
Implementation Method 1
a soil compacting device is inserted into the soil at a specified depth H... and in a second stage, said device is advanced while maintaining it at the specified depth, which allows to compact the soil continuously
Data Source
AI summary
Methods of compacting soil, and devices for carrying out the methods are provided in which an underground compacting device is inserted into the soil at a predetermined depth under which the compaction by the upper level of the soil becomes ineffective.