Pile Guide System for Offshore Installation
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Solution Overview
Problem
Existing methods for installing piles in the sea bottom are not fast or accurate, often resulting in excessive clamping forces and resistance during the driving process, which can lead to jamming and inefficiency.
Innovation Solution
A pile guide system with upper and lower pairs of cooperating guide members, where passive and active guide members are moved to engage the pile, allowing for precise control of forces and positions to minimize clamping pressure and resistance, using hydraulic cylinders and strain gauges for feedback, enabling quick and accurate pile driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If guide members are moved quickly towards the pile to engage it, then the installation speed is improved, but excessive clamping force is generated causing resistance and potential jamming
Solution Approach 1:
The guide members are divided into passive guide members with fixed initial guiding positions and active guide members with adjustable positions. This segmentation allows the passive members to provide rapid engagement while the active members can be precisely positioned to apply only necessary clamping force, preventing excessive resistance.
Solution Approach 2:
The system transitions from static guide members to dynamic ones where active guide members can adjust their positions in real-time based on feedback from force sensors. This dynamic adjustment allows the system to maintain optimal clamping force during pile driving, preventing both insufficient engagement and excessive resistance.
Solution Approach 3:
Force sensors (strain gauges) are installed on the guide members to provide real-time feedback on the actual forces between the guide members and the pile. This feedback enables automatic adjustment of active guide member positions to maintain optimal clamping force and prevent excessive resistance or jamming.
2Force
If guide members are positioned precisely to minimize clamping force, then resistance during driving is reduced, but the positioning time increases
Solution Approach 1:
By segmenting guide members into passive (fixed position) and active (adjustable position) types, the system achieves rapid initial engagement through passive members while precise positioning is performed only by active members when needed, balancing speed and precision.
Solution Approach 2:
Passive guide members are pre-positioned at fixed initial guiding positions before the pile is inserted. This preliminary positioning ensures that the guide members are already in place and ready for rapid engagement, eliminating positioning time during the critical pile driving operation.
3Reliability
If clamping force is increased to hold the pile securely, then the pile is held firmly during driving, but excessive force causes jamming between guide members and pile
Solution Approach 1:
The active guide members dynamically adjust their positions based on real-time force feedback to maintain optimal clamping force. This dynamic control ensures the pile is held firmly during driving while preventing excessive force that would cause jamming between the guide members and pile.
Solution Approach 2:
Force sensors provide continuous feedback on the actual forces between guide members and the pile, enabling automatic adjustment of active guide members to maintain optimal clamping force and prevent excessive resistance or jamming during the driving process.
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 method allows for fast and accurate pile installation with minimized resistance and clamping force, preventing jamming and ensuring efficient pile driving by dynamically adjusting guide member positions based on real-time force measurements.
Implementation Method 1
The guide members comprise hydraulic cylinders having shoes which bear on a part of the circumference of the pile
Implementation Method 2
The actual forces between the pile and the respective guide members can be determined by means of strain gauges at the respective guide members, for example
Data Source
Figure 1~2
AI summary
In a method of installing a pile in the sea bottom by means of a pile guide which has a frame and at least an upper and a lower pair of cooperating guide members, wherein the upper pair and the lower pair are located at a distance from each other in vertical direction, wherein each pair of guide members comprises a passive guide member and an active guide member, the passive guide member and the active guide member are moved towards the pile after placing the pile between each of the pairs of guide members. The passive guide members are moved to respective fixed initial guiding positions with respect to the frame and the active guide members are moved to the pile until the passive and the active guide members engage the pile, after which the pile is hold between the upper pair of guide members and between the lower pair of guide members during driving the pile into the sea bottom, during which the actual forces between the pile and the respective guide members are determined.