Hydraulic Piling Apparatus Jerky Motion
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Solution Overview
Problem
Existing piling methods and apparatuses are inefficient due to noise pollution, material wear, and difficulty in monitoring the hitting event, and they fail to effectively handle varying ground properties and the extraction of piles without disturbing the soil.
Innovation Solution
A piling method and apparatus that utilize a hydraulic system to create a jerky motion within the apparatus body, allowing the pile to be driven downwards without striking any parts, with adjustable speed and damping to minimize noise and maximize efficiency, and include sensors for real-time monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cushion block and damping materials are used between the hammer ram and the pile, then the stress applied to the pile is reduced and the pile is protected from breaking, but the piling efficiency is weakened and the hit event cannot be monitored exactly
Solution Approach 1:
The invention removes the cushion block and damping materials from between the hammer ram and the pile, allowing direct contact for efficient energy transfer. The pile's own structure absorbs the impact forces, eliminating the need for intermediate cushioning components that would reduce piling efficiency.
Solution Approach 2:
The invention incorporates sensors to monitor the hit event and provide feedback on the actual forces applied to the pile. This allows for precise control and monitoring of the piling process, ensuring pile integrity while maintaining efficiency through real-time data on impact parameters.
2Reliability
If a cushion block and damping materials are used to soften the hit, then the stress on the pile is reduced, but the materials wear and must be replaced, interrupting work and changing properties over time
Solution Approach 1:
The invention eliminates the cushion block and damping materials that are subject to wear, replacing them with a direct hammer-to-pile contact system. The pile itself serves as the structural element that absorbs and distributes impact forces, removing the need for consumable cushioning components.
Solution Approach 2:
The pile structure itself provides the protection function that previously required separate cushioning components. The pile's own mass and structural properties absorb and distribute the impact forces, making the system self-sufficient without wearable intermediate components.
3Ease of operation
If a vibrator is used to pull the protection pipe or sheet piles upwards, then the piles can be extracted, but the surrounding ground is disturbed and the carrying capacity of the pile is weakened
Solution Approach 1:
Instead of using vibration to loosen the ground for extraction, the invention uses controlled upward jerking motions that leverage the pile's own weight and the inertial forces to overcome friction and extract the pile. This inverted approach maintains ground stability while achieving extraction.
Solution Approach 2:
The invention employs periodic jerking motions at controlled frequencies to gradually overcome the friction holding the pile in place. These periodic upward impulses accumulate enough force to extract the pile without the continuous ground disturbance caused by vibration.
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 and apparatus provide a noiseless, efficient, and cost-effective piling process that adapts to varying ground conditions, reduces material wear, and allows for precise monitoring and control of the piling process, including the ability to lift piles without disturbing the soil.
Implementation Method 1
a movable part inside the apparatus body is moved downwards, the movable part is stopped hydraulically by means of medium in a cylinder space without the movable part striking the apparatus body or some other part
Implementation Method 2
The speed of the movable part is freely adjustable upwards and downwards and, for this reason, it is possible to choose a suitable jerking frequency for the pile or equivalent
Data Source
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AI summary
A pile is moved downwards by a movable part inside a piling apparatus. An apparatus body is fastened to the pile by fastening elements, during piling the movable part inside the apparatus body is moved downwards, the movable part is stopped hydraulically by medium in a cylinder space without the movable part striking the apparatus body. As the downwards directed motion of the movable part is stopped, the apparatus body and the pile fastened to it jerk downwards, after which, the movable part is moved hydraulically upwards. The counterforce of the motion affects the apparatus body and the pile fastened to it by pushing them downwards. The piling apparatus includes hydraulic cylinder cylinder to the piston of which the movable part is fastened, and to the hydraulic cylinder are connected a pressure transformer, a damping apparatus and a set of control valves to stop the movable part hydraulically.