Removable Ground Anchor Rotation Wedge Release
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Solution Overview
Problem
Conventional removable ground anchor systems face difficulties in complete separation and re-assembly of steel wires or deformed steel bars due to wedges that are cumbersome to retract and re-enlarge, leading to incomplete separation and inconvenience in construction processes, especially under external impacts.
Innovation Solution
A removable ground anchor body using rotation, featuring a screw bar with an octagonal flange and guide groove, a compression spring, and a wedge connection system that allows for easy separation and reconnection of PC strands or deformed steel bars through a key groove and idle portion mechanism, enabling secure and continuous connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional wedge and spring mechanism is used to prevent detachment of the steel wire, then the connection strength is improved, but the ease of operation deteriorates because the wedge cannot be completely retracted and enlarged, making removal difficult
Solution Approach 1:
The patent applies the dynamics principle by making the wedge movable between locked and retracted positions through rotational movement of the operation member. The wedge can be dynamically adjusted: when the operation member rotates to the locked position, the wedge engages with the steel wire to provide strong connection; when rotated to the retracted position, the wedge disengages completely, allowing easy removal. This dynamic mechanism resolves the contradiction by enabling both strong connection during use and complete detachment during removal.
Solution Approach 2:
The patent segments the connection mechanism into distinct functional components: the operation member with key groove and idle portion, the wedge with connection surface, and the steel wire. The key groove and idle portion are separately defined on the operation member, allowing the wedge to be positioned in either a locked state (engaging the key groove) or a retracted state (positioned at the idle portion). This segmentation enables independent control of connection and release functions, resolving the contradiction between maintaining connection strength and enabling easy removal.
2Reliability
If the wedge is continuously compressed by a spring to prevent detachment, then the reliability of connection is improved, but the device complexity increases due to the burden of the spring and wedge mechanism
Solution Approach 1:
The patent replaces the continuous compression mechanism with a dynamic positioning system. Instead of a spring continuously pushing the wedge, the operation member can be rotated to positioned the wedge in either a locked position (engaging the key groove for reliable connection) or a retracted position (at the idle portion for release). This dynamic approach maintains connection reliability when needed while eliminating the continuous mechanical burden of springs, thereby reducing device complexity.
Solution Approach 2:
The patent extracts the spring component from the traditional wedge mechanism and replaces it with a rotation-based positioning system using the operation member. The key groove and idle portion are directly formed on the operation member, eliminating the need for separate spring components to maintain wedge position. This extraction simplifies the device structure while maintaining connection reliability through the rotational locking mechanism.
3Ease of operation
If the anchor body is designed for complete separation, then the ease of operation for removal is improved, but the reliability of re-assembly deteriorates due to external impact and misalignment
Solution Approach 1:
The patent applies asymmetry through the key groove and idle portion design on the operation member. The key groove has a specific asymmetric shape that corresponds to the wedge geometry, ensuring that when the wedge engages the key groove, it achieves precise alignment and proper engagement. The idle portion is positioned asymmetrically to allow complete retraction. This asymmetric design ensures reliable re-assembly by providing a unique, predetermined engagement path while maintaining ease of separation through the idle portion.
Solution Approach 2:
The operation member acts as an intermediary between the wedge and the steel wire during the connection and separation processes. The key groove and idle portion on the operation member mediate the transition between locked and retracted states. During re-assembly, the operation member guides the wedge back into the correct position through the key groove, ensuring proper alignment even after complete separation, thereby maintaining reliability of re-assembly while enabling easy 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 simple and complete separation and reconnection of ground anchor components, maintaining a strong and safe connection state even under impact, facilitating efficient slope reinforcement construction and easy handling of anchor bodies.
Implementation Method 1
an elastic spring for compressing the wedge forward is provided at a rear end of the wedge such that the detachment and separation of the steel wire cab be prevented by compressing the wedge
Implementation Method 2
an operation member on which a screw bar to be connected to screw grooves of a water-proof cap is formed and an octagonal flange is formed on a lower side of the screw bar, from a lower end to upward of which a guide groove is formed
Data Source
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AI summary
The present invention relates to a removable ground anchor body using a rotation wherein when a pc strand or a deformed steel bar (10) is rotated, a screw bar (141) is interlock-rotated to raise an operation member (140) and sequentially raise a body (150) and a wedge (130) from the pc strand or the deformed steel bar (10) thereby to release the connection state. Since an octagonal flange (142) is disposed on an idle portion (156) at the time point when the connection is completed, it can be recognized easily and thus a proper connection state can be kept and the separation due to the decreasing of compression force can be prevent and further excessive compression can be prohibited. Furthermore, the pc strand or the deformed steel bar can be separated and removed simply and at the same time connected fully to keep the strong connection state continuously and safely and re-connected conveniently and simply regardless of places even though the pc stand or the deformed steel bar is separated.