Pipe Pile Coupler and Drive Shaft for Thread Wear Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for installing pipe pilings face challenges in efficiently transferring power through connections and maintaining structural integrity, particularly due to wear and tear at junctions, and difficulties in handling grout during installation.
Innovation Solution
The use of special couplers with internal stop rings and removable fittings, along with a drive shaft assembly that includes a rotary output shaft and socket wrench attachment, facilitates efficient power transfer and grout introduction during the installation of pipe pile assemblies, preventing over-rotation and thread damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If bolts are used to connect pipe pile segments, then the connection strength is improved, but wear on the piles and fasteners increases due to inefficient power transfer
Solution Approach 1:
The patent removes the bolt fastener from the connection system and replaces it with a coupling mechanism that uses internal and external threads directly formed on the pipe pile segments. This extraction of the fastener eliminates the wear problem associated with bolts while maintaining connection strength through the integrated threading system.
Solution Approach 2:
The coupling mechanism merges the connection function and power transfer function into a single integrated system. The internal threads of the coupling and external threads of the pipe pile segments create a unified load path that efficiently transfers driving power while maintaining structural strength, eliminating the need for separate fasteners.
2Strength
If threading is used to connect pipe pile segments, then the connection strength is improved, but wear in the coupler and pipe pile occurs due to over threading or thread damage
Solution Approach 1:
The patent incorporates a recess in the coupling that receives an protrusion on the pipe pile segment, creating a mechanical stop that prevents over-threading before it can cause damage. This beforehand cushioning mechanism protects the threads from excessive stress and damage during the connection process.
Solution Approach 2:
The coupling acts as an intermediary component between pipe pile segments, with its recess and the segment's protrusion forming a mediator mechanism that controls the threading process. This intermediary structure prevents direct harmful interaction between mating threads by providing a controlled engagement path that eliminates over-threading damage.
3Strength
If grout is introduced during installation, then the stability and strength of the pipe piling is improved, but difficulty in handling the grout during installation occurs
Solution Approach 1:
The pipe pile assembly performs the grout introduction function as part of its own installation process. The system is designed so that grout can be introduced through the hollow interior of the pipe piles during driving, eliminating the need for separate grout injection equipment and simplifying the overall installation operation.
Solution Approach 2:
The pipe pile assembly is designed with multi-functionality, serving both as the structural element being installed and as the conduit for grout introduction. This universal design allows the same component to perform multiple functions - providing structural support while also facilitating grout delivery - thereby simplifying the installation process.
4Length of moving object
If the length of the column increases, then the foundation depth capability is improved, but weaknesses in the junctions between pipe pile segments weaken the entire column
Solution Approach 1:
The patent divides the long column into multiple pipe pile segments that are connected through couplings. This segmentation allows the column to achieve greater overall length while maintaining strength at junctions, as each segment can be individually driven and connected with reinforced coupling mechanisms that prevent weakness at connection points.
Data Source
AI summary
Apparatus and methods for the installation of pipe pilings into the ground for use as structural building foundations, geothermal piles, or both, are disclosed. In addition to specialized fittings for pipe pile assemblies, the inventions include specialized drive mechanisms used in conjunction with rotary or vibratory motors. Methods of installing pipe pilings are further improved with the disclosure of methods of adding grout or similar materials during or after installation of the piles.