Geomembranes puncture

Not many analytical methods are available for evaluating geomembrane puncture. The most well-known method, by Giroud et al. (1995), is applicable only to geomembrane puncture because it does not address the selection of a protection geotextile. One of several relationships presented in this method is given in Eq. [17.1] ... 

Fp = geomembrane puncture force (N), foMs = thickness of a geomembrane in contact with a stone (m), tcMp = thickness of geomembrane in contact with a test probe (m), and = strain function. 

Brachman, R.W.I., Sabir, A., 2010. Geomembrane puncture and strains from stones in an underlying clay layer. Geotextiles and Geomembranes 28, 335—343. 

Giroud, J.P., Badu-Tweneboah, K., Soderman, K.L., 1995. Theoretical analysis of geomembrane puncture. Geosynthetics International 2 (6), 1019—1048. 

Ghosh TK. Puncture resistance of pre-strained geotextiles and its relation to uniaxial tensile strain at failure. Geotextiles and Geomembranes 1998 16 293-302. 

Wilson-Fahmy RF, Narejo D, Koerner RM. Puncture protection of geomembranes, part 1 theory. Geosynthetics International 1996 3 605-27. 

Protection Protection of geomembrane against puncture by means of a cushion of nonwoven geotextile. 

The use of a nonwoven geotextile to cushion a geomembrane to prevent it from getting punctured. 

Fig. 8.8. Schematic drawing (not to scale) of the puncture test. The tapered tran-cated cone with its dimensions (left), the arrangement of the tmncated cones on the base plate of the pressure vessel (right) and the test equipment with inserted geomembrane and protective nonwoven geotextile as well as the sand bed are indicated. The test procedure is described in the text...

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