Membrane-Lined Wall for Levee Integrity and Leakage Prevention
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Solution Overview
Problem
Levee cutoff walls face integrity and strength issues due to permeable materials and soil contamination during curing, and are susceptible to seismic forces without reinforcement, leading to leakage and pollution concerns.
Innovation Solution
A membrane-lined wall system is constructed by excavating a trench and installing a low-permeability geomembrane liner with a reinforcement mat, filled with cementitious material that hardens in place, providing a continuous impermeable barrier and structural integrity, and optionally incorporating moisture sensors for monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cutoff walls made of concrete are used, then the wall structure is simple and construction is straightforward, but the permeability of the material and soil contamination during curing reduce the integrity and strength of the wall
Solution Approach 1:
The patent applies composite materials by combining concrete with a geomembrane liner and reinforcement mat. The liner prevents soil contamination during curing, while the reinforcement mat enhances structural strength. This composite structure resolves the contradiction by maintaining material integrity without excessive complexity.
Solution Approach 2:
The geomembrane liner acts as a flexible thin film that lines the trench before concrete is poured. This liner prevents soil particles from contaminating the concrete during placement and curing, thereby maintaining the integrity and impermeability of the cutoff wall without requiring complex construction procedures.
2Strength
If unreinforced cutoff walls are used, then construction is simpler and faster, but the walls are susceptible to seismic and other forces
Solution Approach 1:
The reinforcement mat, typically made of galvanized steel mesh, is integrated with the concrete and liner to create a composite structure. This mat provides tensile strength and ductility to the cutoff wall, enabling it to withstand seismic forces while maintaining a relatively simple construction process.
Solution Approach 2:
The reinforcement mat is installed in sections that are joined together to form a continuous reinforcement structure. This segmentation allows for easier handling and installation during construction, reducing the complexity of the reinforcement process while still providing the necessary strength against seismic forces.
3Object-generated harmful factors
If a membrane-lined wall system is implemented, then leakage and pollution are prevented through the impermeable barrier, but the construction process becomes more complex
Solution Approach 1:
The geomembrane liner serves as an impermeable barrier that lines the trench before concrete is poured. This flexible film prevents water and contaminants from penetrating through the cutoff wall, effectively addressing leakage and pollution concerns while integrating seamlessly with the concrete structure.
Solution Approach 2:
The liner is installed in the trench before the concrete is poured. This preliminary action ensures that the impermeable barrier is in place before the concrete is placed, preventing any potential contamination or leakage paths from forming during the construction process.
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 membrane-lined wall effectively prevents leakage and pollution by creating a durable, impermeable barrier that withstands seismic forces and groundwater movement, ensuring the integrity and longevity of the levee system while allowing for remote monitoring of moisture levels.
Implementation Method 1
the weight of the cementitious material forces the liner into close contact with the sides of the trench
Implementation Method 2
vibration, such as by an internal vibrator, may be applied to the cementitious material before it hardens. The vibration during the hardening process can remove air in the cementitious material and prevent honeycombing
Data Source
AI summary
A method for forming a trench and a membrane-lined wall in the trench for levee reinforcement or leak prevention, prevention of water migration, and pollution control of impoundments. The membrane-lined wall generally includes a cementitious or concrete wall formed within an excavated trench. The concrete may be internally reinforced, and the wall may also comprise a double-layer of impermeable geomembrane liner that forms a barrier between the concrete and the sides and bottom of the trench. The membrane or liner reduces water migration, prevents levee leakage, and prevents the escape of contaminants in impoundments.