Dredging Suction Head with Ridge and Furrow Ports
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Solution Overview
Problem
Conventional dredging systems struggle to efficiently clear mud from the furrows between Z-shaped gravel ridges on an underwater foundation bed surface, leading to ineffective contact between immersed tube sections and abnormal settlement during subsea immersed tunnel construction.
Innovation Solution
A dredging system with a suction head featuring ridge surface and furrow suction ports, connected to a power component and pipeline, allows simultaneous mud removal from the top surfaces of gravel ridges and furrows, utilizing a lifting and moving mechanism controlled by a sophisticated control system, including GPS-RTK and electro-hydraulic drives, to ensure efficient and precise dredging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional dredging system is used to clear mud from the gravel foundation bed surface, then the mud on the top surfaces of gravel ridges can be removed, but the mud in the furrows between adjacent gravel ridges cannot be efficiently cleared
Solution Approach 1:
The suction head is segmented into multiple independent suction ports: ridge surface suction ports for clearing mud on top surfaces of gravel ridges, and furrow suction ports for clearing mud in furrows between ridges. This segmentation allows simultaneous dredging of different surface types, resolving the contradiction by enabling comprehensive coverage while maintaining high productivity.
Solution Approach 2:
Different suction ports are positioned at different heights and orientations to match the local geometry of the Z-shaped gravel ridge surface. The ridge surface suction ports are positioned to clear mud on elevated ridge tops, while furrow suction ports are positioned lower to access mud in depressed furrow areas, enabling effective dredging across varying local conditions.
2Productivity
If a Z-shaped gravel ridge foundation bed surface is formed by riprapping, then the foundation bed can be paved efficiently, but furrows are created between adjacent gravel ridges that are difficult to dredge
Solution Approach 1:
The dredging system merges ridge surface dredging and furrow dredging into a single integrated suction head assembly. Both ridge surface suction ports and furrow suction ports operate simultaneously from one positioned unit, eliminating the need for separate dredging operations or complex multi-component systems, thus avoiding increased device complexity while maintaining paving efficiency.
Solution Approach 2:
The suction head is designed as a universal multi-functional device that can clear mud from both ridge surfaces and furrows simultaneously. This multi-functionality allows a single dredging system to handle the complete dredging requirement for Z-shaped gravel ridge surfaces, preventing the need for additional specialized equipment.
3Ease of operation
If multiple suction ports are added to the dredging head to clear both ridges and furrows, then dredging coverage is improved, but the structure becomes more complex
Solution Approach 1:
The multiple suction ports are nested within a single integrated suction head structure. The ridge surface suction ports and furrow suction ports are arranged in a compact configuration where smaller suction elements are positioned within or adjacent to the main suction body, reducing overall structural complexity while maintaining comprehensive dredging coverage.
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 system effectively clears mud from both ridge surfaces and furrows, improving the quality and efficiency of the dredging process, preventing settlement issues and ensuring effective contact between immersed tube sections, while being simple in structure and operation.
Implementation Method 1
the dredging suction head includes at least one ridge surface suction port and at least one furrow suction port; each ridge surface suction port is used for sucking mud on the top surface of each gravel ridge; and each furrow suction port is used for sucking mud in a furrow
Data Source
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AI summary
The present application discloses a dredging system for a pre-paved gravel foundation bed surface (01) in open sea deep water, including a dredging mechanism (1), which includes a dredging suction head (11), a power component (12) and a dredging pipeline (13), wherein the dredging suction head is connected with the dredging pipeline; the dredging pipeline is communicated with the power component; the dredging suction head includes at least one ridge surface suction port (111) and at least one furrow suction port (112); the openings of all the furrow suction ports are lower than those of all the ridge surface suction ports; a lifting mechanism (2), which is connected with the dredging suction head and is used for lifting the dredging suction head to the gravel foundation bed surface; a moving mechanism (3), which is connected with the lifting mechanism and is used for driving the dredging suction head to move within a dredging range of the gravel foundation bed surface. By the adoption of the dredging system for the pre-paved gravel foundation bed surface in the open sea deep water of the present application, the dredging suction head includes the ridge surface suction ports and the furrow suction ports, and may suck mud on the top surfaces of gravel ridges and the mud in furrows between two gravel ridges at the same time, thereby guaranteeing the dredging quality of the gravel foundation bed surface and improving the working efficiency. The dredging system is simple in structure, convenient to use and good in dredging effect.