Ground Pile Production with Nested Drilling and Expansion Tools
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Solution Overview
Problem
Existing methods for producing ground piles with enlarged pile heads are not efficient or quick, often requiring multiple operations and retooling, which limits flexibility and increases time and cost.
Innovation Solution
A method and device utilizing a drilling tool with a first rotary drive and an expansion tool with a second rotary drive, where the drilling tool is guided within the expansion tool, allowing independent control of sinking depths and simultaneous operation to create a cavity for filling with suspension, thereby producing ground piles with enlarged pile heads in a single operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple operations and retooling are used to produce ground piles with enlarged pile heads, then the pile head can be enlarged, but the production time increases and efficiency decreases
Solution Approach 1:
The patent combines multiple operations (drilling, cavity formation, and suspension dispensing) into a single integrated device. The drilling tool with dispensing device is combined with the expansion tool, allowing all operations to be performed in one continuous process without retooling, thus resolving the contradiction between achieving enlarged pile heads and maintaining high productivity
Solution Approach 2:
The drilling tool serves multiple functions: it drills the borehole, creates the cavity through rotational movement, and dispenses the suspension simultaneously. This multi-functional design eliminates the need for separate tools and operations, enabling both precise enlarged pile head formation and rapid production
2Productivity
If a single operation is used to produce ground piles with enlarged pile heads, then production time is reduced, but control over sinking depths becomes more difficult
Solution Approach 1:
The device employs dynamic control mechanisms where the rotational speed of the drilling tool can be adjusted during operation. The expansion tool's rotation is controlled to achieve the desired cavity depth, while the drilling tool continues to advance. This dynamic adjustment of rotational parameters during the single operation enables precise depth control while maintaining high productivity
Solution Approach 2:
The system incorporates feedback control through the independent rotational drives of the expansion tool and drilling tool. By monitoring and adjusting the rotation speeds and depths of each tool separately, the system can maintain precise control over the cavity formation and suspension dispensing processes, ensuring accurate pile head enlargement even during continuous operation
3Adaptability or versatility
If the drilling tool and expansion tool are operated independently, then flexibility in depth adjustment is improved, but device complexity increases
Solution Approach 1:
The device is segmented into functionally independent components: the expansion tool with its own rotational drive for cavity formation, and the drilling tool with its own rotational drive and dispensing mechanism. This segmentation allows each component to be controlled independently for flexible depth adjustment, while the modular design keeps the overall device complexity manageable through clear functional separation
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 quick and efficient production of ground piles with enlarged pile heads, distributing foundation forces over a larger area, reducing point loading and allowing adjustable depth and independent control of sinking operations, thus enhancing flexibility and reducing production time.
Implementation Method 1
drilling the boring tool under rotary drive to a second depth T2 which is below the first depth T1
Implementation Method 2
sinking the expansion tool under rotary drive to a first depth T1
Implementation Method 3
pulling the drilling tool and the reaming tool out of the ground while dispensing suspension, the suspension filling a cavity formed by the tools
Data Source
Figure 1~2
Figure 3~4
Figure 5a~5f
AI summary
The invention relates to a method for producing ground piles with enlarged pile heads comprising the following process steps: sinking the enlargement tool 9 to a first depth T1; sinking the drilling tool 7 to a second depth T2, which lies below the first depth T1, wherein the outer diameter D7 of the drilling tool 7 is smaller than the outer diameter D9 of the enlargement tool 9, wherein the rotational speed of the enlargement tool 9 is reduced when sinking the drilling tool 7 from the first depth T1 to the second depth T2; pulling the tools 7, 9 out of the ground 3 with the release of suspension, wherein the suspension fills a cavity formed by the tools 7, 9.The invention further relates to a device comprising a drilling tool 7 with a first rotary drive 14 and an extension tool 9 with a tube body 26 and a second rotary drive 23, wherein the drilling tool 7 is guided longitudinally in the tube body 26 of the extension tool 9.