Segmented Fiber Reinforced Pipe Liner for Watertight Structural Integrity
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Solution Overview
Problem
High-strength pipe liners made of woven fibers with polymeric matrices often develop pinhole leaks due to water permeability issues, allowing groundwater to infiltrate and pressurized fluids to escape, compromising the structural integrity and watertightness of pipes.
Innovation Solution
A method involving the use of a water penetration-resistant layer and a strengthening layer of fiber-reinforced polymer, where the water penetration-resistant layer is woven in a resistant weave and positioned to cover the pipe's inner or outer surface, combined with a strengthening liner to enhance structural reinforcement and provide a watertight barrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a woven fibrous liner with polymeric matrix is used to strengthen the pipe, then the structural strength is improved, but water permeability increases allowing pinhole leaks to form
Solution Approach 1:
The liner is divided into two distinct functional layers: a strengthening layer for structural reinforcement and a water barrier layer for preventing water infiltration. This segmentation allows each layer to optimize its specific function without compromising the other.
Solution Approach 2:
The solution uses a composite structure combining different fiber types and material properties - the strengthening layer uses high-strength fibers while the water barrier layer uses tightly woven fibers with water-resistant properties. This composite approach resolves the contradiction between strength and watertightness.
2Ease of manufacture
If a loose weave structure is used in the fiber liner, then the polymeric material can penetrate and bond effectively, but water can infiltrate through the openings between fibers
Solution Approach 1:
The liner is segmented into two layers with different weave densities. The strengthening layer can have a looser weave to facilitate polymer impregnation, while the water barrier layer uses a tight weave to prevent water infiltration, eliminating the need to compromise between these conflicting requirements in a single layer.
Solution Approach 2:
Different regions of the liner structure have different qualities - the strengthening layer has a weave optimized for polymer penetration and structural strength, while the water barrier layer has a weave optimized for water resistance. Each layer's local quality is optimized for its specific function.
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 effectively enhances the structural strength of the pipe while creating a watertight barrier, preventing groundwater infiltration and pressurized fluid leakage, even under high pressure conditions.
Implementation Method 1
The curable polymer in the water penetration resistant layer and the strengthening layer is cured while the water penetration resistant layer and strengthening layer are positioned in relation to the pipe
Data Source
AI summary
In a method of reinforcing a pipe, a water penetration resistant layer and strengthening layer of fibrous material are impregnated with a curable polymer, positioned in a lining position near the pipe, and cured to form a water penetration resistant liner and a strengthening liner. The two layers can be impregnated and positioned separately or at once, for example, as a composite liner. Together, the liners provide a waterproof barrier and structural reinforcement to the resulting pipe. In a method of waterproofing a reinforced pipe, a water penetration resistant layer is impregnated with curable polymer, positioned over a previously installed reinforcing liner, and cured to form a waterproof barrier inhibiting ground water egress into the pipe. In certain embodiments of the methods, the water penetration resistant layer includes fibers woven in one of a satin weave and a twill weave.