Weld-Free Geocell With Offset Incisions For Slope Stability
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Solution Overview
Problem
Existing geocell designs for slope stabilization suffer from instability due to shifting under filling materials like peat-sand mixtures or coarse gravel, leading to loss of slope profile and uneven stress distribution, resulting in reduced tensile strength and labor-intensive production.
Innovation Solution
A weld-free geocell blank made from a polymeric sheet with parallel line incisions, where adjacent incisions in rows are offset, and reinforced with aramid or carbon fibers, featuring additional openings for tendons and drainages, ensuring uniform stress distribution and improved tensile strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If geocell is made by stretching a sheet material with segmental apertures, then cellular confinement structure is formed, but plastic deformation occurs resulting in non-equivalent strength and inconsistent wall thickness
Solution Approach 1:
The sheet material is divided into multiple parallel line incisions that are offset from each other, creating a segmented pattern that forms cellular structures when stretched. This segmentation allows uniform stress distribution across multiple stress paths rather than concentrating stress at single aperture points.
Solution Approach 2:
The incisions are designed with specific geometric characteristics - parallel line segments of equal length arranged in offset rows with controlled spacing ratios (S/L=0.1-0.5, D/L=0.1-0.7). This local geometric quality ensures uniform wall thickness throughout the structure, preventing weak points that would reduce overall tensile strength.
2Ease of manufacture
If geocell is made by stretching a blank with slit incisions, then weld-free geocell is produced, but stresses concentrate at incision ends reducing tensile strength
Solution Approach 1:
Instead of single continuous slits, the design uses multiple parallel line incisions segmented into offset rows. This segmentation distributes stress across multiple locations and creates redundant load paths, preventing stress concentration at single incision endpoints while maintaining weld-free construction.
Solution Approach 2:
The parallel line incisions are arranged in asymmetric offset rows rather than symmetric patterns. This asymmetric arrangement creates more uniform stress distribution during stretching by avoiding symmetric stress concentration points, thereby improving overall tensile strength while maintaining ease of manufacture.
3Stability of the object's composition
If known geocell designs are used for slope stabilization, then soil confinement is achieved, but geocell shifts under filling material influence during infilling and operation
Solution Approach 1:
The geocell structure is designed with inherent geometric stability features before filling - the offset parallel line incisions create a pre-stabilized cellular pattern that resists shifting. This preliminary structural design prevents geocell migration during the filling process and under subsequent loading, maintaining slope profile reliability.
Solution Approach 2:
The specific geometric parameters of the incisions (parallel line segments of equal length, offset row arrangement with controlled spacing ratios S/L=0.1-0.5 and D/L=0.1-0.7) are optimized to change the mechanical behavior of the geocell, providing enhanced resistance to shifting while maintaining confinement effectiveness.
Data Source
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AI summary
This invention relates to the field of building, and more particularly to geocell structures, and can be used for stabilizing water body shorelines and beds, slopes and retaining wall bridge abutments in such areas of construction as the oil and gas, transport and hydraulic engineering industries, amongst others. A blank for producing a weld-free geocell is made from a polymer sheet material (1) having incisions (2) therein in the form of segments of parallel lines, said segments being of the same length and being arranged in rows (R1, R2,...RN) with the lines of incisions in adjacent rows being offset along the direction of the incisions. Adjacent incisions (2) in the same row (R1, R2,...RN) have a distance S between the ends thereof and the relationship S/L=K1, where K1 is from 0.1 to 0.5; the incisions (2) of adjacent rows (R1, R2,...RN) are at a distance D from each other and have the relationship D/L=K2, where K2 is from 0.1 to 0.7. At the ends of the incisions (2) there are openings (3) which are oval or circular in shape. A weld-free geocell comprises at least one blank stretched in a direction perpendicular to the lines of the incisions (2) to form a three-dimensional cellular structure. The technical result is an increase in the tensile strength of a geocell and a reduction in the outlay entailed in manufacturing same.