Membrane-Lined Buried Wall Installation Sled for Levee Reinforcement
Find Innovative SolutionsGenerate Solutions
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 and other forces without reinforcement.
Innovation Solution
A membrane-lined wall system is formed in-place in a trench using a low-permeability geomembrane liner and a reinforcement mat, filled with cementitious material to create a reinforced, impermeable barrier that prevents leakage and pollution, with optional moisture detection and vibration to enhance structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional cutoff walls are constructed using permeable materials like concrete, then the wall can be built with simple construction methods, but the wall's integrity and strength are reduced due to material permeability and soil contamination during curing
Solution Approach 1:
A geomembrane liner is installed within the trench before backfilling. This flexible film creates an impermeable barrier that prevents soil contamination of the concrete during curing and eliminates permeability issues, while allowing the concrete structure to maintain its simple construction approach
Solution Approach 2:
The cutoff wall system combines multiple materials: concrete for structural strength, geomembrane for impermeability, and reinforcement elements. This composite approach resolves the contradiction by allowing each material to perform its optimal function - concrete provides ease of construction and structural framework, while the geomembrane ensures reliability through contamination prevention
2Productivity
If cutoff walls are constructed without reinforcement, then the construction process is simpler and faster, but the walls become susceptible to seismic and other external forces
Solution Approach 1:
Reinforcement elements are pre-installed within the trench and positioned before concrete pouring. This preliminary action ensures proper placement and alignment, allowing rapid concrete placement without requiring complex formwork or adjustment procedures during construction, thus maintaining high productivity while ensuring structural strength
Solution Approach 2:
The system combines concrete with reinforcement materials (such as steel rebar or mesh) to create a composite structure. The concrete provides mass and simplicity of construction, while the reinforcement embedded within provides resistance to seismic forces, resolving the contradiction between construction speed and structural strength
3Reliability
If a membrane-lined wall system is installed with proper liner and reinforcement, then the wall's impermeability and structural integrity are significantly improved, but the construction process becomes more complex
Solution Approach 1:
The construction process is divided into distinct sequential steps: trench preparation, geomembrane liner installation, reinforcement placement, and concrete pouring. This segmentation allows each component to be optimized independently and installed by specialized crews, reducing overall complexity despite the multiple steps involved
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 system effectively reinforces levees, prevents water contamination, and enhances structural integrity by creating a durable, impermeable barrier resistant to seismic forces and pollution, while allowing for remote monitoring of moisture levels.
Implementation Method 1
wherein 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 system and method for installing a membrane-lined wall for levee reinforcement or leak prevention. The installation system may comprise a sled positioned above the trench having a length, and may comprise a frame and support members, and a weight suspension system mounted on the frame to lower an elongated weight into the trench. The liner installation sled may also include a liner roller rotatably mounted on the frame, the liner roller adapted to hold a roll of a liner above the surface on a first side of the trench when the liner installation sled is in an installation position relative to the trench, wherein a longitudinal axis of the roll of liner can be aligned with the length of the trench. The elongated weight is usable to force the liner into the trench.