Sheet Pile Installation with Parallel Drills for Deep Insertion
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Solution Overview
Problem
Existing sheet piling technologies are limited in inserting plastic sheet piles beyond 2 meters due to insufficient soil loosening mechanisms, making them unsuitable for longer infrastructural projects.
Innovation Solution
A sheet piling installation with parallel soil drills that extend through sheet pile channels, loosening subsoil with extendable drill teeth to facilitate insertion of plastic sheet piles of any length, using a king post, drill assembly, and guide assembly for precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If plastic sheet piles are pushed downwards into the subsoil, then insertion is possible, but the inserted length is limited to about 2 meters due to insufficient soil loosening
Solution Approach 1:
The drill assembly performs preliminary action by rotating the soil drill before and during the insertion process to loosen the subsoil in advance. This creates a cleared path and reduces resistance, enabling the sheet pile to be inserted to greater depths without excessive force requirements.
Solution Approach 2:
The rotating soil drill generates mechanical vibration and loosening action in the subsoil, creating a cleared path that facilitates deeper insertion. The rotational motion of the drill teeth disrupts and loosens the soil structure, reducing friction and resistance during sheet pile insertion.
2Length of moving object
If steel sheet piles are driven or vibrated into the subsoil for large infrastructural projects, then deep insertion is achieved, but the complexity and cost increase significantly
Solution Approach 1:
The soil drill acts as an intermediary tool that mediates between the insertion force and the subsoil resistance. By rotating the drill to loosen the soil in advance, it reduces the direct resistance encountered during insertion, enabling deeper penetration without requiring equally complex driving or vibration equipment.
Solution Approach 2:
The invention replaces complex mechanical driving or vibration systems with a simpler rotational drilling mechanism. The soil drill uses rotational motion to loosen soil, which is a simpler and more controlled mechanical action compared to high-force driving or vibration systems required for deep steel sheet pile installation.
3Ease of operation
If drill teeth are extended to loosen subsoil, then soil loosening is achieved, but the drill head size increases
Solution Approach 1:
The drill teeth are designed to be movable or extendable relative to the drill head body. During operation, the teeth can be extended outward to engage and loosen the subsoil, then retracted or folded back when not in use. This dynamic configuration allows the drill head to maintain a compact form while providing effective soil loosening capability when needed.
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 the insertion of plastic sheet piles exceeding 2 meters by effectively loosening subsoil, allowing for versatile application in various infrastructural projects.
Implementation Method 1
a first drill drive assembly for rotation of the first soil drill, and a second drill drive assembly for rotation of the second soil drill
Implementation Method 2
the drill head comprises a head base on the base tube and multiple drill teeth that are moveable with respect to the head base between a retracted position and an extended position
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
The invention relates to a sheet piling installation for insertion of a sheet pile in a subsoil, wherein the sheet pile comprises a first sheet pile tube that defines a first sheet pile channel, and a second sheet pile tube that defines a second sheet pile channel, and wherein the sheet piling installation comprises an elongated king post, and a drill assembly and a sheet pile guide assembly on the king post, wherein the drill assembly comprises an elongated first soil drill and a first drill drive assembly for rotation of the first soil drill, and an elongated second soil drill and a second drill drive assembly for rotation of the second soil drill, wherein the first soil drill and the second soil drill extend parallel to each other and pass through the respective first sheet pile channel and second sheet pile channel.