Use of HDPE geomembranes as alternative to the use of concrete for channels lining in remote areas

¹ Chair, IGS Chile. CEO, Axios Engineering SpA, Chile
² Project Civil Engineer, Axios Engineering SpA, Chile
³ Geotechnical Engineer, Axios Engineering SpA, Chile. MSc Candidate in Seismic and Geotechnical Engineering, University of Chile.

^* Andrés León: andres.leon@axiosingenieria.cl
^† Felipe Cornejo: felipe.cornejo@axiosingenieria.cl
^‡ Daniel Zúñiga: daniel.zuniga@axiosingenieria.cl

Abstract

The use of high-density polyethylene (HDPE) geomembranes as channels linings for water transportation is an effective solution that offers numerous advantages over traditional concrete lining systems. This paper evaluates the use of these geomembranes as lining system for diversion channels for a photovoltaic power plant in the II Region of Antofagasta, Chile. The study consisted of the analysis of advantages and limitations of using geomembranes as channels linings for water transportation, compared to traditional concrete lining. Additionally, it is described the main recommendations for proper installation and maintenance of the geomembranes to ensure their effectiveness and durability over time. To ensure optimal performance, the hydraulic design of the geomembranes considered parameters such as water velocity and flow rate, slope, and crosssectional area of the channel. Structural design factors such as impact resistance, rupture resistance, and erosion were also considered. The study concludes that HDPE geomembranes are an efficient solution for water channels lining, guaranteeing safe and long-lasting water retention. Flexibility, adaptability to terrain irregularities, simple transportation and installation are some of the main advantages of geomembranes. Additionally, geomembranes have long-term durability, resistance to low and high temperatures, and are an optimal solution for remote areas with logistical difficulties.