Case analysis
- Location: USA
- Product: 1.0mm Impermeable Membrane Liner
- Project: Canal Project
Project Status
In 2015, BPM was one of several suppliers bidding to supply 1.0mm impermeable membrane liner for US customers. The project is a prototype for in-situ lining of canals, relocation of canals across the United States, and the first of its kind in California. After the bidding process is completed, the client company decides to award the contract to the BPM company. In the autumn of 2015, Mr. Joe, the design engineer of BPM, contacted the client company to provide the PVC geomembrane liner. During the ensuing months, a great deal of research and development was carried out to address the issues of handling HDPE linings during the in-situ lining process. Because the project is on an expedited schedule, the actual fabrication of most of the equipment is underway, while other development work is being done on the handling of the lining material. Fabrication of the geomembrane took place in February and March 2015, shipment to California and physical placement of the liner in the canal began in June 2015.
Solution
Impermeable membrane liner was selected as the membrane lining material for the underwater application of this canal project. The agency selected geomembrane liner based on a number of factors, including:
(1)Availability of large panels. The HDPE is made into panels of 4m x 60m.
HDPE geomembranes are highly flexible and maintain their properties over a wide temperature range. This makes the liner more adaptable to the environment of the canal bed than other available geomembrane materials.
(2)HDPE geomembranes are easily spliced on-site with special adhesives. PVC geomembranes also have very good puncture, abrasion and tear resistance, which is important to minimize damage during installation.
(3)The history of the use of impermeable membrane liner in canal linings has been proven in many projects for over 205 years.
As the canal lining was to be done in two stages, requiring a longitudinal seam in the impermeable membrane liner down the center of the canal, it was necessary to use a geomembrane that could seal underwater. Since an unbonded longitudinal seam would not provide the necessary leakage control, laboratory studies concluded that a vinyl swimming pool adhesive used to repair pool liners would be an appropriate adhesive for the seam. Laboratory test results for joint strength of underwater joints proved to be comparable to normally manufactured field joints, even though these were constructed underwater.
There are also concerns that the freshly poured concrete could break off along the slope of the canal’s side walls. Initial design requirements called for a 200g/m2 non-woven geotextile to be applied to the slope on top of the HDPE. The final solution is to bond this geotextile to a HDPE liner at BPM’s factory to produce a composite HDPE geomembrane. The backing is then refolded and rolled up before installation at the project site. It is expected that factory laminated products will be available as 1.0mm PVC geomembrane and non-woven geotextile bonded to the lining side and will be available for future projects.
Advantage
- It has high tensile strength, excellent elongation and convenient construction.
- Aging resistance, good abrasion resistance, strong puncture resistance, chemical corrosion resistance, and ultraviolet radiation resistance.
- It has good low temperature flexibility and can well adapt to the temperature difference of the environment.
- Good high and low temperature resistance,
- Excellent hot-melt performance, which can be more convenient for construction welding
- Long service life
Summarize
Facts have proved that the choice of impermeable membrane liner for this project is an excellent choice. Custom fabrication of the impermeable membrane liner is used for handling with this equipment during placement and the additional cost of the geomembrane liner is minimal. In addition, the performance of the liner and geotextile combination for this project was very satisfactory. After this section of the canal is lined, a local third-party authority will monitor performance to determine whether additional sections should be lined and completed at a future date. Portions of canals across the United States that supply the canal with water are being investigated for potential resurfacing work. Due to the need to maintain water quality for environmental reasons, an environmental impact study was carried out before the project started.
Water quality was extensively monitored during the placement of the concrete and lining in the canal. No adverse effects on the environment have occurred or are expected. Environmental priorities are important as the canal supports a fishery with 16 different species, as well as irrigation water for the Coachella Valley.
Specifications of Impermeable Membrane Liner for Canal Project in USA
- Product: PVC Geomembrane
- Specification: 1.0mm thickness
- Roll Size: 4m×60m
- Quantity: 30000 square meters
About BPM
BPM has been specializing in delivering one stop geosynthetics products and solutions to worldwide customers since its foundation in 2007. BPM had provided many types of effective and state of the art geomembranes, geotextiles, geocells, geosynthetic clay liners (GCLs), drainage boards, geogrids to over 81 countries. Our main customers are from Australia, France, Sweden, UK, Hong Kong, Hungary, New Zealand, Poland, Mexico, Ecuador, Brazil, Pakistan, Bangladesh, Thailand, Vietnam, Malaysia, Indonesia, Singapore, Philippines, Sri Lanka, India, UAE, Saudi Arabia, Qatar, Kenya, Ghana, Ethiopia, Somalia, Nigeria, South Africa, Swaziland, Mongolia, etc.
BPM is not only manufacturing best quality geosynthetic products but also providing professional design and installation service. OEM, ODM, custom development and fabrication are also available. If you have any questions or inquiries, please fill and submit the following form, we will reply as soon as possible.
