Textile Grid Reinforced Mortar Lining for Pipe Rehabilitation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional mortar lining methods for water and sewage pipe rehabilitation face issues with low construction quality, excessive thickness reducing pipe cross-section, and susceptibility to fine cracks due to drying shrinkage and environmental loads, especially when using non-continuous reinforcement materials like reinforcing bars or wire meshes.
Innovation Solution
An apparatus and method utilizing a textile grid reinforcement material with a work vehicle, textile grid disposing apparatus, mortar nozzle, and cone-type drag trowel to form a continuous mortar lining on the inner surface of water and sewage pipes, reducing the thickness of the mortar lining and preventing fine cracks by using a high-strength composite material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional mortar lining methods are used without continuous reinforcement, then construction is simpler, but the lining is susceptible to fine cracks due to drying shrinkage and environmental loads
Solution Approach 1:
The patent applies composite materials by combining mortar lining with textile grid reinforcement. The textile grid, made of high-strength fibers, is embedded within the mortar layer to create a composite structure that maintains crack resistance while allowing for thinner, more efficient lining applications.
Solution Approach 2:
The textile grid reinforcement provides localized strength enhancement at critical points within the mortar lining. The grid structure distributes stress locally, preventing crack propagation without requiring the entire lining to be uniformly thick or heavily reinforced.
2Strength
If excessive thickness of mortar lining is used to ensure structural integrity, then strength is improved, but the pipe cross-section is reduced
Solution Approach 1:
By using textile grid reinforcement embedded in mortar, the composite structure achieves high strength-to-thickness ratio. The high-strength fibers carry tensile loads while the mortar provides compression resistance, allowing thinner lining sections that preserve pipe cross-section while maintaining structural integrity.
Solution Approach 2:
The patent changes the material parameters by introducing high-strength fiber-reinforced composite materials, which have superior mechanical properties compared to conventional mortar alone. This allows reduction of lining thickness while maintaining or improving strength characteristics.
3Strength
If conventional reinforcing materials like reinforcing bars or wire meshes are used, then structural support is provided, but corrosion occurs reducing service lifetime
Solution Approach 1:
The patent replaces conventional metal reinforcement (rebar or wire mesh) with textile grid reinforcement made of corrosion-resistant high-strength fibers. This composite material provides equivalent or superior structural support while being immune to corrosion, thereby extending the service lifetime of the pipe lining.
Solution Approach 2:
The textile grid reinforcement is designed as a non-metallic, corrosion-proof alternative that eliminates the need for corrosion protection measures. While the material itself is durable, the solution avoids the lifecycle costs associated with maintaining and replacing corroded metal reinforcement.
4Ease of operation
If non-continuous reinforcement materials are used, then construction is easier, but construction quality is low and fine cracks develop
Solution Approach 1:
The textile grid reinforcement is designed to be flexible and easy to install like conventional materials, but its continuous mesh structure provides uniform reinforcement throughout the mortar lining. The grid's geometry and material properties ensure consistent crack resistance and construction quality without complicating the installation process.
Data Source
AI summary
Provided are an apparatus for forming non-excavation water and sewage pipe lining for rehabilitation using a textile grid reinforcement material and mortar lining, which allows a textile grid reinforcement material to be continuously disposed and mortar lining to be formed thereon when an old water and sewage pipe is rehabilitated by forming mortar lining in the old water and sewage pipe to fundamentally suppress fine cracks generated on the coated mortar lining, allows the textile grid reinforcement material, to be applied so as to solve a problem of corrosion of the reinforcement material generated when a conventional reinforcing bar or a wire mesh is applied, and in comparison to a conventional method of forming lining of only mortar, allows the textile grid reinforcement material to be applied to reduce a thickness of mortar lining and to perform continuous construction so as to perform economical construction, and a method thereof.