Hollow Precast Concrete Jars for Soil Stabilization
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Solution Overview
Problem
Existing soil stabilization and erosion control systems face challenges with stability against wave action, differential settlement, and scouring, particularly when placed on uneven or soft earthen surfaces, leading to displacement and failure of structures.
Innovation Solution
The use of hollow precast concrete jars or piles with integrated base cutters, driven or screwed into the ground, providing stability through skin friction and designed to blend with the natural landscape, with optional sloped or truncated tops to prevent scouring and maintain vertical alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If units are placed on top of ground or earthen surface for erosion control, then erosion protection is provided, but stability against wave action is limited and units become displaced
Solution Approach 1:
The system divides the erosion control function into multiple components: hollow members provide structural stability when embedded in the ground, while separate erosion control units placed on top provide erosion protection. This segmentation allows each component to optimize its function without compromising the other.
Solution Approach 2:
The erosion control units are positioned within or adjacent to the hollow members, creating a nested configuration where the hollow members serve as stable anchors embedded in the ground, and the erosion control units provide the actual erosion protection at the surface level.
2Object-affected harmful factors
If units are placed on soft or uneven earthen material, then erosion control is achieved, but differential settlement occurs and structures lean over
Solution Approach 1:
The system separates the stabilization function (hollow members embedded in ground) from the erosion control function (units on surface), allowing the embedded members to accommodate differential settlement while maintaining the vertical alignment and structural integrity of the erosion control units.
Solution Approach 2:
The hollow members act as intermediary elements that are embedded in the soft or uneven earthen material, absorbing the effects of differential settlement and providing a stable foundation that prevents the erosion control units from leaning or failing.
3Stability of the object's composition
If bell shaped or spread bottom units are used to prevent sinking, then stability against differential settlement is improved, but units cannot be placed close to one another and vertical alignment is compromised
Solution Approach 1:
The system divides the stabilization function into multiple discrete hollow members that can be independently positioned, allowing them to be placed close together in vertical alignment while each member independently resists sinking through its embedded configuration in the ground.
4Ease of manufacture
If units are made with thin walls to reduce material usage, then manufacturing cost is reduced, but durability and resistance to wave action is compromised
Solution Approach 1:
The system separates the structural stability function (provided by hollow members with adequate wall thickness embedded in ground) from the erosion control function (provided by separate units on surface), allowing the hollow members to have sufficient wall thickness for durability while the overall system remains material-efficient through functional segmentation.
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 stabilizes soil and prevents erosion by ensuring the structures remain upright and stable even under wave action, while blending with the natural environment, thus enhancing the durability and effectiveness of soil stabilization and erosion control.
Implementation Method 1
supported by the skin friction of the soil, loam, sand and/or other earthen material on both the exterior and interior of pile jars
Implementation Method 2
A base cutter portion can be made from a material other than concrete, e.g., metal or diamond tipped, and can be coupled to the concrete pile or jar
Data Source
AI summary
An earth stabilization system includes a plurality of hollow jars positioned within ground to be stabilized, the jar walls formed from a concrete material or mix. The jars include a base cutter including a plurality of teeth coupled to a jar wall at or near the wall bottom, the base cutter including at least one material other than concrete, e.g., metal, diamond tip or carbide tip. The jars can be coupled to a turning tool that can cause rotation of the jar to turn or drive the jar into the soil mass or waterbed. The turning tool effects rotation of the jar and the base cutter, and the weight of the jar and the base cutter at least in part enable the jar to penetrate the ground to be stabilized. Displaced soil or other earthen material can move through a bore in the wall of the jar while the jar is being screwed into the soil in the direction of the wall bottom to the wall top. The base cutter of each jar can be welded to reinforcing material in a jar wall. The base cutter of each jar can also be included as an integral portion of a single jar unit.