Pile Driving Assembly With Soil Remover
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Solution Overview
Problem
Existing pile driving assemblies face high resistance and inefficiency when driving piles into dense soil, as the anvil and collar directly contact the soil, leading to unnecessary soil compaction and increased resistance.
Innovation Solution
A pile driving assembly that incorporates a soil remover, mounted to a follower, which can be used to dislodge and remove sediment from the pile during driving, allowing for efficient penetration without compacting dense soil materials, using a fluid jet or mechanical excavators to loosen and discharge soil without interrupting the driving process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the anvil directly contacts the collar to transmit hammering energy to the pile, then the pile driving efficiency is improved, but the soil material inside the pile is compacted causing high resistance in dense soils
Solution Approach 1:
The invention extracts the harmful function of soil compaction by introducing a soil remover device that actively removes soil material from inside the pile. The soil remover includes cutting edges that cut soil and a removal mechanism that extracts it through a discharge outlet, preventing compaction while maintaining efficient energy transmission from the anvil to the pile.
Solution Approach 2:
The follower acts as an intermediary between the anvil and the pile, providing a transmission path for hammering energy without direct anvil-collar contact that would cause compaction. The follower transmits energy to the pile while the soil remover simultaneously removes soil material, mediating between the driving force and the soil interaction.
2Strength
If the collar contacts the soil material to compact it during final hammering, then the bearing capacity is improved, but the resistance increases excessively in very dense soil
Solution Approach 1:
The invention replaces the mechanical compaction system (anvil-collar direct contact) with a soil removal system. The soil remover uses cutting edges to slice soil and a removal mechanism to extract it, substituting the compaction function with a removal function that avoids excessive resistance in dense soils while still providing adequate bearing capacity.
Solution Approach 2:
The invention changes the parameter of soil density inside the pile from compacted (high density) to removed (low density). By actively removing soil material rather than compacting it, the system changes the physical state and density parameter of the soil, reducing resistance while maintaining structural integrity for bearing capacity.
3Stability of the object's composition
If the pile is driven deep into the bottom to prevent soil entry, then the structural stability is improved, but the installation time and energy consumption increase
Solution Approach 1:
The soil remover performs preliminary action by removing soil material from inside the pile during the driving process itself, rather than requiring post-installation cleaning or deeper driving to prevent soil entry. This preliminary removal action reduces the need for excessive penetration depth, saving time and energy while maintaining stability.
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 pile driving by reducing soil compaction and resistance in dense soils, allowing for deeper penetration without damaging the soil remover, and facilitating easier installation of bearing elements like grout for offshore structures.
Implementation Method 1
using a fluid jet or mechanical excavators to loosen and discharge soil without interrupting the driving process
Implementation Method 2
the hammering energy is directly transmitted from the anvil to the pile via the collar
Implementation Method 3
a hydraulic driver including an anvil, wherein the pile has an inwardly protruding circumferential collar
Data Source
Figure 1~3
Figure 4~8
Figure 6
AI summary
A pile driving assembly for installing a pile in an underwater bottom comprises a tubular pile and a hammer for driving the pile into an underwater bottom. The assembly is provided with a soil remover for removing soil inside the pile. The soil remover is located below the hammer and remote from a lower end of the pile in assembled operating condition.