Underwater Channel Board Stabilization via Polymer Grouting
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Solution Overview
Problem
Conventional methods for repairing and stabilizing subsided or damaged channel boards in water canals are inefficient, as they struggle to maintain stability and prevent seepage underwater, leading to further erosion and structural instability.
Innovation Solution
A method involving underwater grouting using stainless steel grouting pipes and non-aqueous reactive polyurethane polymer, combined with geotextile bags, to lift and stabilize channel boards by filling and consolidating the gravel layer, preventing water infiltration and erosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cement is used for underwater repair and stabilization of channel boards, then the repair process is simple and conventional, but the channel boards cannot be stabilized and lifted, leading to further subsidence and erosion
Solution Approach 1:
The patent changes the chemical parameters of the grouting material from traditional cement to non-aqueous reactive polymer grout. This polymer grout has different chemical properties that enable it to react and expand underwater, providing lifting force and effective stabilization. The parameter change in material composition resolves the contradiction by achieving both stabilization effectiveness and operational feasibility underwater.
Solution Approach 2:
The patent introduces geotextile bags as an intermediary element between the grout and the channel board. These bags are placed underneath the channel board and filled with non-aqueous reactive polymer grout, which expands and lifts the channel board to its original position. The geotextile bags act as a mediator that enables the lifting and stabilization process while managing the complexity of underwater operations.
2Reliability
If channel boards are replaced or repaired underwater using conventional methods, then the repair can be performed, but water erosion removes gravel and sand, causing further damage and affecting canal safety
Solution Approach 1:
The geotextile bags serve as an intermediary that prevents water from directly eroding the gravel and sand layers. When filled with expanding polymer grout, these bags lift the channel board and simultaneously create a protective barrier that stabilizes the underlying gravel layer, preventing water erosion while maintaining repair efficiency.
Solution Approach 2:
The patent uses a composite approach combining geotextile bags with non-aqueous reactive polymer grout. This composite material system provides both structural support for lifting the channel board and erosion protection for the underlying gravel layer, achieving both anti-erosion capability and repair efficiency simultaneously.
3Productivity
If non-aqueous reactive polymer grout is used for underwater grouting, then channel boards can be rapidly stabilized and lifted, but the grouting process becomes more complex
Solution Approach 1:
The grouting system is segmented into multiple components: geotextile bags positioned underneath the channel board, multiple grouting pipes inserted into the bags, and the non-aqueous reactive polymer grout itself. This segmentation allows for controlled injection and expansion, enabling rapid stabilization while managing the complexity through modular, systematic deployment.
Solution Approach 2:
The patent utilizes hydraulic principles by injecting liquid polymer grout through pipes into the geotextile bags. The grout expands under pressure, generating lifting force to raise the channel board rapidly. This pneumatic-hydraulic mechanism enables fast repair action while the systematic injection process manages the operational 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 method rapidly and effectively stabilizes and lifts channel boards, preventing further subsidence and erosion, while ensuring the structural integrity of the canal and providing a green, environmentally friendly solution for underwater repairs.
Implementation Method 1
performing a first polymer grouting through the multiple first grouting pipes, and then performing a second polymer grouting through the at least one second grouting pipe
Data Source
AI summary
A method for stabilizing and lifting a channel board by underwater grouting includes (A) when the channel board is damaged, removing the damaged channel board, cleaning and leveling a gravel layer under the damaged channel board, placing an undamaged channel board installed with first grouting pipes and a second grouting pipe on the gravel layer, wherein multiple geotextile bags are respectively bound to the first grouting pipes; when the channel board is subsided, installing first grouting pipes and a second grouting pipe into first grouting holes and a second grouting hole, respectively; (B) performing a first polymer grouting through the first grouting pipes, and performing a second polymer grouting through the second grouting pipe; (C) cutting off a part of the first grouting pipes the second grouting pipe which are exposed to the channel board, and leveling incisions; and (D) removing excess polymer left on the channel board.