Combined Suction Anchor Reinforced by Grouting Spiral
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Solution Overview
Problem
Suction anchors face limitations in anti-overturning bearing capacity when subjected to large vertical and horizontal forces, with existing solutions either failing to improve this capacity or causing soil disturbance during installation.
Innovation Solution
A combined suction anchor reinforced by a grouting spiral anchor, which includes a gravity suction anchor, an L-shaped skirt board, and a spiral anchor, where the spiral anchor is grouted into the seabed soil to form a high-strength concrete anti-pulling area, enhancing vertical, horizontal, and anti-overturning bearing capacities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a traditional suction anchor is used, then the construction is simple and it adapts to various marine environments, but the anti-overturning bearing capacity is insufficient when subjected to large vertical and horizontal forces
Solution Approach 1:
The patent combines a suction anchor with a spiral anchor to form a composite anchor system. The suction anchor provides initial installation capability while the spiral anchor provides enhanced anti-overturning bearing capacity through its helical blades that engage with the seabed soil, resolving the contradiction between construction simplicity and anti-overturning strength.
Solution Approach 2:
The patent uses a composite structure combining the suction anchor body with the spiral anchor components, creating a hybrid system that leverages the advantages of both anchor types - the suction mechanism for installation and the spiral geometry for improved bearing capacity against overturning forces.
2Productivity
If rotation is used to reduce downward-penetration resistance, then installation efficiency improves, but excessive soil disturbance occurs and bearing capacity is reduced
Solution Approach 1:
The patent employs a rotatable spiral anchor that can rotate during installation to reduce penetration resistance and improve installation efficiency. The rotational capability allows the spiral blades to cut through soil more effectively while controlling the rotation to minimize excessive soil disturbance and maintain bearing capacity.
Solution Approach 2:
The spiral anchor geometry is designed to preliminarily prepare the soil path during rotation, creating a controlled disturbance pattern that facilitates easier installation while minimizing overall soil disruption compared to forced penetration methods.
3Strength
If multiple side barrels are connected to the main barrel, then the structure provides additional support, but the integrity is compromised and bearing capacity cannot be exerted as a whole
Solution Approach 1:
The patent integrates the spiral anchor components with the suction anchor main body into a unified composite structure. The spiral anchor blades are positioned and configured to work together with the suction anchor as a single integrated system, maintaining structural integrity while providing enhanced support capabilities.
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 solution significantly improves the overall bearing capacities and safety performance of suction anchors by forming a reinforced concrete area that resists external forces effectively, ensuring stability and integrity during operation.
Implementation Method 1
suction anchors, as a basic form of the ocean, have characteristics of adapting to a variety of marine environments
Implementation Method 2
the spiral anchor is grouted into the seabed soil to form a high-strength concrete anti-pulling area
Data Source
AI summary
Provided is a combined suction anchor reinforced by a grouting spiral anchor, including a gravity suction anchor, an L-shaped skirt board and a spiral anchor. The gravity suction anchor includes a suction anchor top plate and a wall of a suction anchor barrel body and uses a concrete press block to reach an estimated set position faster during penetration due to self-weight thereof. Thereafter, the skirt board is lifted to outside of the suction anchor through a lug, and a fixing bolt is used to connect the skirt board to the suction anchor. The spiral anchor rod passes through a skirt board hole performed in the skirt board to penetrate into a deep site of seabed, and concrete is grouted through the skirt board hole to a seabed soil area loosened due to penetration of the spiral anchor rod, thereby forming a concrete reinforced area after the concrete solidifies.