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Basal high strength geotextiles
Published in Jay Ameratunga, Sivakugan Nagaratnam, M. Das Braja, Soft Clay Engineering and Ground Improvement, 2021
Geotextiles (or geosynthetics) are defined as textile (or synthetic) materials used in a soil environment. Today, many different types of geotextiles and geosynthetics are available and these perform a wide range of functions when included in soils. Koerner (2012) and Shukla (2011) are good textbooks on geotextiles and geosynthetics in general. While different geosynthetics behave differently in soil environments, it is the ability of the high strength geotextiles (woven geotextiles and geogrids) to carry tensile loads at defined strains over long periods of time that make them ideal as soil reinforcement materials.
Principles of Landfill Barrier Systems
Published in T. H. Christensen, R. Cossu, R. Stegmann, Landfilling of Waste: Barriers, 2020
Thomas H. Chrristensen, Raffaello Cossu, Rainer Stegmann
Geocomposites are products obtained by combining two or more different geosynthetics and, sometimes, natural materials. The most typical configurations of geocomposites are: geotextile + bentonite + geotextile (bentonite geocomposite) and geotextile + synthetic drainage mat + geotextile (geocomposite drain).
POF Sensors for Structural Health Monitoring
Published in Marcelo Martins Werneck, Regina Célia da Silva Barros Allil, Plastic Optical Fiber Sensors, 2019
The large-scale monitoring of objects and facilities can be realized by integrating distributed fiber optic sensor elements in geosynthetic carrier structures. The eligibility of using geosynthetics as sensor carriers can be directly derived from the rapidly growing fields of application of these materials. Due to technical and economic advantages over conventional building materials, geosynthetics can be found in many civil engineering construction works and major projects. For example, they serve as building materials in coastal defense and flood protection, water traffic engineering, track and embankment constructions for landfills, and dam engineering. An additional integration of the fiber optic sensor cables into such geosynthetics allows creating multifunctional sensitive structures that have enormous potential for future solutions to many questions of large-scale monitoring for structural and civil engineering. Furthermore, the geosynthetics-integrated distributed fiber optic sensors are excellent tools to provide information about soil displacement, erosion control, critical mechanical deformations, and cracking in geotechnical, concrete, and masonry structures.
Behavior of Concrete Slabs Reinforced by Different Geosynthetic Materials
Published in HBRC Journal, 2022
Ahmed M. El-Hanafy, Samiha E. Alharthy, Ahmed M. Anwar
Geogrids are one of the polymeric materials classified under geosynthetics materials consisting of parallel arrangements of connected tensile ribs with openings of satisfactory measure to permit strike-through of surrounding geotechnical material [1]. Geogrids have been typically utilized in earthen structures such as pavements, embankments and shallow foundations. The essential work of geogrids is to supply fortification to earth structures. While unbound granular geo-materials ordinarily cannot withstand tension, the use of the geogrid reinforcement gives resistance to particle movement [2]. Geosynthetics have widely been used in geotechnical applications. They are utilized as reinforcement elements to achieve stabilization of soil. Geogrids have been successfully utilized to improve delicate subgrades and give a development stage over them [3,4]. Khadaii et al. studied using geogrids as interlayers to relieve intelligent cracking in black top overlays of jointed plain concrete (JPC).
Determination of critical phreatic level for landslide assessment using a scaled down laboratory model
Published in International Journal of Geotechnical Engineering, 2022
R. Ramkrishnan, Animesh Sharma, Karthik Viswanathan, D. Ravichandran
Mild steel (MS) metal sheet tank with dimensions 2.30 m x 1.00 m x 1.25 m was fabricated with openings covered with glass on one side of the tank to monitor the slope deformations and phreatic/water level as depicted in Figure 3(a,b) (Won 2010). The tank was further sub-divided into two compartments (length 2.0 m and 0.3 m respectively) using a perforated metal sheet wrapped with non-woven geotextile to allow water drainage through it. Slope prototypes were modelled in the larger compartment (2.0 m long) while the smaller compartment (0.3 m long) was gauged with ball-valves to maintain and regulate water through supplying water tank. A graduated scale was fixed on the glass container to enable measurement of the water level. Further grids were marked up within the tank to simulate required slope inclinations to monitor them. To allow drainage from the model slope, geotextiles i.e. permeable geosynthetic fabrics made from polypropylene or polyester were used for filtration and to drain water through it while preventing the flow of soil particles through it.
Dynamic puncture modeling of polyester needle-punched nonwoven geotextile fabrics using finite element method
Published in The Journal of The Textile Institute, 2021
Mina Sabet Eghlidi, Hasan Mashroteh, Mohammad Saleh Ahmadi, Emad Owlia
Geotextiles, as one of the most widely used geosynthetic materials, are woven, knitted or nonwoven fabrics that are used in contact with geotechnical materials. The needle-punched nonwoven geotextiles are cost effective materials with versatile mechanical and physical properties, which are widely used in various applications, such as filtration, separation, drainage, protection, etc. Therefore, it is important to study the properties of geotextiles to improve their performance. Among the mechanical properties of the needle-punched nonwoven geotextiles, their resistance to the static and dynamic punctures is of great importance, since it determines the performance of the geotextile against installation damages, which may occur by the falling sharp stones during installation. Therefore, various studies have been conducted in the past to investigate the puncture behavior of the textile fabrics.