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An experimental study on the improvement of tunnel drainage system using a geogrid composite
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 Title & Authors
An experimental study on the improvement of tunnel drainage system using a geogrid composite
Lee, Jun S.; Choi, Il-yoon; Lim, Jihoon; Yoon, Suk Chul;
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 Abstract
A new testing equipment is designed to investigate the characteristics of the drainage fabric which is used in the tunnel drain system. The equipment is possible to model the loading as well as boundary conditions of the shotcrete precisely and it follows the general guideline of ASTM D4716 so that the interface between shotcrete and concrete lining retains the real situation in the tunnel site. Using the real loading conditions and surface irregularities, the flow rate and its capacity of the regular fabric has been estimated. A composite drainage fabric having geogrid inside was also used to investigate the flow rate and its efficiency. The advantages of the composite fabric compared with the regular one have been demonstrated using the experimental data and brief outline of the future work is finally proposed.
 Keywords
Drainage system;Geogrid;Permeability;Roughness;Flow rate;
 Language
Korean
 Cited by
 References
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