Active Gripping Sheet Pile Installation Mandrel
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Solution Overview
Problem
Existing sheet piling systems face limitations in installation depth and material usage due to buckling deformation and passive gripping forces, which restrict the length of pile installation and require heavier piles than necessary.
Innovation Solution
An active gripping mechanism is integrated into the installation mandrel to engage and release sheet piles, allowing deeper installations with reduced damage and maintaining interlock integrity between adjacent piles, using a mandrel configuration that grips sheet piles along both sides and accommodates expansion for alignment and sealant application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If passive gripping is used to attach the piling to the mandrel, then the system is simpler to operate, but the installation depth is limited because skin friction exceeds passive gripping forces
Solution Approach 1:
The gripping mechanism transitions from a static passive attachment to a dynamic active system that can apply and release gripping forces on demand, enabling deeper installations by overcoming skin friction through controlled active gripping forces
Solution Approach 2:
The system replaces passive mechanical attachment relying on friction with an active mechanical gripping system that uses applied forces to secure the piling to the mandrel, allowing installation depths where skin friction would otherwise exceed attachment capabilities
2Length of stationary object
If the piling length is increased to achieve deeper installations, then the installation depth improves, but buckling deformation increases exponentially
Solution Approach 1:
The active gripping mechanism applies preliminary securing forces to the piling before and during installation, preventing buckling deformation by maintaining structural support along the piling length, especially critical for longer piles where buckling risk increases exponentially
3Strength
If heavier piles are used to resist deformation during installation, then the structural stability improves, but the material usage and manufacturing costs increase
Solution Approach 1:
The system replaces reliance on increased piling weight and material strength with an active mechanical gripping system that provides the necessary structural support during installation, allowing the use of lighter, thinner piles that would otherwise be prone to buckling
Solution Approach 2:
The invention changes the critical parameter from piling material strength and weight to active gripping force magnitude, allowing optimization of piling dimensions for final structural performance rather than installation resistance, thereby reducing material usage
4Stability of the object's composition
If corrugated profiles are used to provide structural rigidity, then the buckling resistance improves, but the manufacturing complexity and costs increase
Solution Approach 1:
The active gripping system replaces the need for corrugated profiles that provide rigidity through geometric complexity, allowing the use of simpler flat or smoother profiles that are easier and less expensive to manufacture while maintaining installation stability through active gripping
Data Source
AI summary
A system and method for installing sheet piles using active gripping along side portions of the sheet piles. A sheet pile profile including first and second locking profiles and a gripping flange enables engagement of the sheet piles onto a mandrel for installation. Double engagement flanges on the locking profiles and an expandable connection between adjacent sheet piles provide improved resistance to fluid passage.