STUDY ON THE IMPERVIOUSNESS OF SHEET USED IN THE CONSTRUCTION OF SLOPE WORK WITH GEOCELLS AND SOIL NAILS

Abstract

RRS method has been developed for improving cost-effectively the stability of existing embankments against large earthquakes and rainfalls by combining geocells and soil nails. In the aim to improving further the stability of RRS embankments against rainfalls along with their cost-effectiveness, it is proposed to use additionally an impervious sheet. By effectively restraining the infiltration of rainwater into the embankment, the number of soils nails can also be reduced in comparison to conventional RRS embankments. During the sheet installation, some heterogeneities inevitably appear (junction parts, damaged parts by anchor pin fixation) so that a series of rainfall laboratory tests and numerical analyses have been conducted to investigate their permeability properties.