Adjustable Raked Pile Driver Using Push-Pull Method
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Solution Overview
Problem
Existing pile driving technologies are limited in their ability to drive multiple piles at close spacings, particularly slanted piles, and lack the flexibility to rake piles in multiple axes or drive them perpendicular to alignment, making them inefficient for complex foundation requirements like piers and cantilever structures, and are often bulky and unsuitable for confined urban areas.
Innovation Solution
A compact modular pile driver system using interconnected units with a centralised clamping system and a base adaptor that allows for raking and rotation of piles, converting vertical driving force into horizontal clamping force, enabling the progressive driving of slanted piles at minimum 3 times the diameter spacing and any axis orientation, including horizontal, without the need for heavy counter-reaction loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing push pull method is used to drive sheet and tube piles in alignment, then piles can be driven in alignment, but cannot raked piles in one or even two axes nor drive adjacent piles perpendicular to the alignment
Solution Approach 1:
The pile driver incorporates adjustable raking mechanisms that allow the driving direction to be dynamically changed from horizontal alignment to angled orientations (1V:1H to true vertical in z-axis) and rotated to any angle in x-y plane, enabling versatile pile driving configurations without requiring multiple specialized devices
Solution Approach 2:
The pile driver is designed to perform multiple functions: driving piles in alignment, raking piles in one axis, raking piles in two axes, and driving adjacent piles perpendicular to alignment, all within a single integrated system, thereby eliminating the need for separate specialized equipment for each operation type
2Power
If heavy counter-reaction loads like hydraulic static pile driver are used, then high capacity pile driving is achieved, but the equipment becomes bulky and unsuitable for confined urban areas
Solution Approach 1:
The invention extracts and eliminates the need for heavy counter-reaction loads and bulky hydraulic static pile drivers by using a compact modular design with interconnected units that generate sufficient driving force through coordinated operation without requiring large external counterweights or heavy machinery
Solution Approach 2:
The pile driver is divided into multiple modular units that can be interconnected to form a compact configuration, allowing the system to achieve high capacity pile driving through distributed force application rather than relying on a single heavy piece of equipment, thereby reducing overall equipment volume and enabling use in confined urban areas
3Force
If common bulky heavy counter-reaction loads are used, then pile driving force is sufficient, but the equipment cannot be easily transported or positioned in confined spaces
Solution Approach 1:
The pile driver is segmented into multiple modular units that can be independently handled and positioned, then interconnected to form the complete driving system, enabling easy transport and positioning in confined spaces while maintaining sufficient driving force through the coordinated action of the modular units
4Productivity
If fixed anchor set is used to drive central pile, then resistance against driving is provided, but cannot drive by advancing all piles progressively into the ground like push and pull method
Solution Approach 1:
The invention merges the push and pull methods into a single integrated pile driver system where multiple modular units work together to progressively drive all piles in a group, combining the advantages of both push and pull methods to achieve advanced pile driving efficiency while maintaining manageable system complexity through modular design
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 efficient and flexible pile driving in confined spaces with minimal traffic disruption, providing lateral stability for complex foundations by allowing precise control over pile orientation and spacing, reducing the need for large side clamps and enabling high-capacity pile driving with reduced equipment size and weight.
Implementation Method 1
converting vertical driving force into horizontal clamping force
Implementation Method 2
vertically compressed springs
Implementation Method 3
maximum friction of the single pile which is insufficient if it encounters an obstruction or hard driving
Data Source
AI summary
A pile driver assembly consisting of a plurality of pile driver units interconnected together to a rigid base frame that uses the push and pull method to drive a group of raked piles. The pile driver units progressively push one pile at a time for a short distance into the ground while being pull down by the rest of the stationary driven piles in a repeated cyclical driving sequence until the required pile driving force is reached for every pile in the group. The pile driver assembly consists a plurality of interconnected pile driver units, a pile driver base adaptor, a pile clamping system and strong base frame to drive the piles in a two dimensional array of variously raked pile group from 1V:1H to true vertical in the z-axis and rotated to any angle in the x-y plane at a minimum pile's spacing of three times the pile's diameter.