Rotary Drive Tip Pile System with Segmented Torque Transmission
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Solution Overview
Problem
Installing piles or foundation members into stiff, rocky, or soft subsurface environments is challenging due to the risk of damage during conventional driving methods.
Innovation Solution
A system comprising a removable drive extension member with a keyed protrusion connected to a rotary power source and a rotary drive tip pile member with a hollow upper portion and helical blades, allowing the drive extension member to transfer rotational force to the pile member without exposing the upper portion to torsional stress, enabling secure installation into the ground.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional driving methods are used to install piles into stiff, rocky, or soft subsurface environments, then installation can be achieved, but the pile can be damaged during installation
Solution Approach 1:
The pile system is divided into two separate members: a drive extension member (first member) and a rotary drive tip pile member (second member). The drive extension member contains the keyed protrusion for torque transmission, while the rotary drive tip pile member contains the keyed opening and helical blades. This segmentation allows the torque-transmitting components to be isolated from the upper pile shaft, preventing damage to the foundation-critical upper portion during installation.
Solution Approach 2:
The keyed protrusion and keyed opening form an intermediary torque transmission mechanism. The drive extension member acts as an intermediary component that transfers rotational force from the power source to the rotary drive tip pile member without directly transmitting torsional stress to the upper pile shaft. This intermediary system protects the upper portion while enabling effective installation into difficult ground conditions.
2Productivity
If rotational force is applied to drive piles into difficult ground, then installation effectiveness is improved, but torsional stress may damage the upper pile shaft
Solution Approach 1:
The system segments the torque transmission function from the upper pile shaft. The drive extension member with keyed protrusion handles all rotational force application, while the upper pile shaft remains free from torsional stress. This segmentation enables effective installation into rocky or stiff ground while preserving the strength and integrity of the upper pile shaft that must support the foundation structure.
Solution Approach 2:
The torque transmission capability is extracted from the upper pile shaft and placed into the drive extension member and rotary drive tip pile member assembly. By taking out the rotational driving function from the vulnerable upper shaft, the invention enables powerful installation without compromising the upper pile shaft's structural integrity for foundation support.
3Power
If a solid connection is made between drive mechanism and pile, then torque transmission is improved, but the upper pile shaft is exposed to damaging stresses
Solution Approach 1:
The power transmission path is segmented into distinct functional zones. The keyed protrusion in the drive extension member and keyed opening in the rotary drive tip pile member create a solid torque connection, but this connection is isolated from the upper pile shaft. The segmentation ensures efficient power transmission to the ground-engaging blades while protecting the upper shaft from harmful torsional stresses.
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 system effectively drives piles into difficult ground conditions without damaging the upper pile shaft, ensuring structural integrity and facilitating installation in various subsurface materials.
Implementation Method 1
a keyed protrusion... and a keyed opening for receiving the keyed protrusion
Implementation Method 2
a lower portion that includes one or more blades along a perimeter of the lower portion, the blades being helical
Data Source
AI summary
For supporting a foundation of other structure, there is provided a system for driving a pile into the ground using a rotary power device. In one example, a system includes a first member with a first end connecting to a drill and a second end having a keyed protrusion; and a second member having a hollow pile adapted to receive the first member therein, one or more blades along a perimeter of a lower portion, and a keyed opening for receiving the keyed protrusion. In use, a drill is connected with the first member, and the first member is inserted into the second member, and the drill drives the first member into and through the ground. The drill and the first member are removed, leaving the second member positioned into the ground at its desired depth.