Offshore Foundation Pile With Collinear Channels For Force Transmission
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Solution Overview
Problem
The installation of offshore foundation piles made of mineral building materials is challenging due to high forces required during installation, which can lead to material fatigue and is not feasible in rocky subsoil, and existing methods like pile-driving and vibration methods have limitations in terms of noise, stress, and cost, while drilling methods are costly for larger diameters.
Innovation Solution
Integrating multiple collinear channels within the foundation pile's wall, allowing for the transmission of forces through these channels using a liquid medium or rod-shaped elements, reducing load on the pile wall and enabling easier and faster installation, even in challenging subsoil conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a foundation pile made of mineral building material (concrete) is used, then cost is reduced and maintenance properties are improved, but the wall thickness must be increased to provide sufficient strength and the pile cannot withstand high installation forces
Solution Approach 1:
The foundation pile is divided into two distinct parts: a mineral building material wall (concrete) and a separate reinforcement structure (steel cage or steel ribs). This segmentation allows each material to perform its optimal function - concrete provides compression strength and cost benefits, while steel provides tensile strength and installation force resistance, resolving the contradiction between cost reduction and strength maintenance
Solution Approach 2:
The foundation pile employs a composite structure combining mineral building materials (concrete) with metallic reinforcement (steel). This composite approach allows the pile to leverage the advantages of both materials - the cost-effectiveness and maintenance properties of concrete alongside the high strength and durability of steel, thereby achieving both cost reduction and sufficient strength
2Productivity
If traditional pile-driving or vibration methods are used for installation, then installation speed is improved, but high forces cause material fatigue and these methods are ineffective in rocky subsoil
Solution Approach 1:
The reinforcement structure (steel cage or ribs) is integrated into the concrete pile during manufacturing, performing preliminary strengthening before installation. This preliminary action ensures the pile can withstand high installation forces from pile-driving or vibration methods without suffering material fatigue, while still achieving fast installation speeds
Solution Approach 2:
The reinforcement structure acts as a cushioning element that absorbs and distributes the high stresses generated during pile-driving or vibration installation. This beforehand cushioning prevents stress concentrations that would cause material fatigue in pure concrete piles, enabling the use of high-speed installation methods
3Strength
If the foundation pile wall thickness is increased to provide sufficient strength, then strength is improved, but the installation forces required increase and installation becomes more difficult
Solution Approach 1:
The structural requirements are segmented between the concrete wall (providing compression strength) and the steel reinforcement (providing tensile strength and installation force resistance). This segmentation allows the concrete wall to remain thin while still achieving sufficient overall strength, thereby easing installation
Solution Approach 2:
The composite structure enables the concrete wall to be thinner than a pure concrete pile would require, because the steel reinforcement carries part of the structural load. This reduces the wall thickness and overall pile size, making installation easier while maintaining sufficient strength
4Adaptability or versatility
If drilling method is used for installation in rocky subsoil, then installation feasibility is improved, but cost increases significantly for larger diameter piles
Solution Approach 1:
The reinforcement structure is pre-integrated into the pile during manufacturing, preparing the pile for high-force installation methods. This preliminary strengthening enables the use of pile-driving or vibration methods even in rocky subsoil conditions, avoiding the need for expensive drilling operations while maintaining installation feasibility
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
This approach simplifies and accelerates the installation process of foundation piles, reduces material fatigue, and allows for installation in various subsoil types, including rocky ground, by distributing forces effectively through the channels.
Implementation Method 1
a plurality of channels running essentially collinear to the foundation pile axis is integrated into the foundation wall. At least some of the plurality of channels each have an upper opening on the top end face... allowing for the transmission of forces through these channels using a liquid medium
Data Source
AI summary
A foundation pile, in particular offshore foundation pile, comprising a circumferential foundation wall extending in the longitudinal direction, wherein the foundation wall is bounded on the lower side by a lower-side end face and on the upper side by an upper-side end face, wherein the foundation wall is formed from a mineral building material, wherein in the foundation wall a plurality of channels extending substantially collinear to the foundation pile axis is formed, running substantially collinear to the foundation pile axis, wherein at least a part of the plurality of channels has an upper opening on the upper end face in each case.