Screwable Foundation Driving with Alternating Torque and Striking Force
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Solution Overview
Problem
Existing methods for driving screwable foundations into the ground face challenges in varying soil conditions, particularly with stones, as they either fail to ensure reliable anchoring or risk damaging the foundation due to the need for pre-drilling and the use of combined rotary and striking tools.
Innovation Solution
A method and apparatus that alternates or simultaneously applies torque and striking force to screwable foundations with an external helix, adjusting the ratio of torque to striking power in favor of torque, and regulates rotation rate and striking force based on soil conditions to ensure secure penetration and anchoring without loosening the surrounding soil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screwable foundations are screwed into the ground with rotary tools to ensure reliable anchoring, then anchoring reliability is improved, but the screw helix may loosen the surrounding soil or be damaged by stones in hard soils
Solution Approach 1:
The patent combines rotary screwing motion with axial striking motion in a single integrated driving apparatus. The rotary component advances the screwable foundation through soil engagement, while the striking component delivers axial blows to break through stones and hard obstacles. This merging of two previously separate processes (pre-drilling with striking tools followed by screwing with rotary tools) into one simultaneous operation allows the foundation to be installed directly without pre-drilling, maintaining anchoring reliability while preventing soil loosening and foundation damage.
Solution Approach 2:
The striking component performs preliminary breakdown of stones and hard obstacles ahead of the screwable foundation's screw helix. By pre-breaking these obstacles through axial striking blows, the path is cleared for the rotary component to advance the foundation smoothly without encountering resistance that would cause soil loosening or foundation damage. This preliminary action eliminates the need for separate pre-drilling operations.
2Productivity
If pre-drilling is performed before screwing in screwable foundations to overcome stony soil conditions, then penetration capability is improved, but anchoring reliability deteriorates due to hole enlargement and potential foundation damage
Solution Approach 1:
The patent merges the penetration function (previously requiring separate pre-drilling) with the anchoring function (screwing in) into a single integrated process. The driving apparatus simultaneously performs axial striking to break through obstacles and rotary screwing to advance the foundation, eliminating the need for separate pre-drilling operations that caused hole enlargement and anchoring reliability issues.
Solution Approach 2:
The integrated driving apparatus maintains continuous useful action by simultaneously performing striking and screwing operations in one continuous process. This eliminates the interruption and hole enlargement associated with removing a pre-drilling tool and replacing it with a screwing tool. The foundation is advanced continuously with uninterrupted engagement of the screw helix into the ground, preserving anchoring reliability.
3Strength
If combined rotary and striking tools are used to drive screwable foundations into hard soils, then penetration into hard soils is improved, but the foundation may be damaged due to the complexity of the driving system
Solution Approach 1:
The patent merges rotary and striking functions into a single integrated driving apparatus with a unified drive mechanism. Rather than using separate tools or a complex multi-component system, the invention combines the rotary drive shaft and striking mechanism into one cohesive unit that operates simultaneously, reducing overall system complexity while maintaining penetration strength into hard soils.
Solution Approach 2:
The driving apparatus is designed as a universal multi-functional tool that performs both rotary screwing and axial striking operations through a single integrated system. The drive head incorporates both the rotary drive shaft for screwing and the striking mechanism for breaking obstacles, allowing one tool to perform multiple functions that previously required separate specialized tools, thereby reducing complexity.
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
This approach ensures reliable anchoring of screwable foundations in hard and stony soils by preventing the screw helix from loosening the surrounding soil and overcoming obstacles without damaging the foundation, while maintaining a secure hold in the ground.
Implementation Method 1
a torque and a striking force onto the screwable foundation, aligned in the driving direction of the screwable foundation, are used in alternation in succession or at least temporarily simultaneously
Implementation Method 2
the screwable foundation has on its outer contour a thread-type external helix with a defined pitch
Implementation Method 3
the screwable foundation is not to loosen it substantially. Depending on the soil conditions, therefore different web heights have been developed
Data Source
AI summary
Disclosed is a method for driving a screwable foundation, which comprises a thread-type external helix that has a pitch on the outer contour thereof, into the ground. In said method, a striking force is applied to the screwable foundation in the driving direction in alternation with or at least temporarily simultaneously with a torque when the screwable foundation is driven into the ground.