Effect of infiltration on the performance of an unsaturated geotextile-bolstered soil wall


  1. A entire-scale geotextile-reinforced soil wall was developed in purchase to evaluate the characteristics of drinking water infiltration and its impact on the structure efficiency. Nonwoven geotextiles had been selected as inclusions in purchase to offer not only reinforcement, but also interior drainage to the wonderful-grained soil used as backfill material.
  2. The composition was built in a laboratory setting, which facilitated implementation of a comprehensive instrumentation program to evaluate volumetric water content material changes of soil, suction, experiencing displacements and reinforcement strains. An irrigation system was utilised to simulate controlled rainfall functions. The monitoring system allowed the evaluation of the improvement of infiltration and inner geosynthetic drainage.
  3. Evaluation of the effect of the hydraulic response on the all round performance of the construction incorporated evaluation of the advancement of capillary breaks at soil-geotextiles interfaces. Capillary breaks resulted in drinking water storage earlier mentioned the geotextile reinforcements and led to retardation of the infiltration front in comparison to the infiltration that would take place with out the presence of permeable reinforcements. Right after breakthrough, drinking water was also found to migrate along the geotextiles, suggesting that the reinforcement layers ultimately offered in-aircraft drainage potential.
  4. While era of optimistic pore drinking water pressures was not evidenced during the tests, the advancing infiltration entrance was located to impact the efficiency of the wall. Especially, infiltration led to increasing reinforcement strains and going through displacements, as effectively as to the progressive loss of suction. Whilst the accumulation of water because of to the short term capillary split also resulted in an enhanced backfill unit fat, its influence on deformation of the wall was not attainable to be captured but it is intrinsic on the all round actions observed in this examine.
  5. Correlations among reinforcement strains/confront displacement and the common of suction in the backfill soil, as measured by tensiometers in different places inside the backfill mass, point to the relevance of the suction as a agent indicator of the deformability of the geotextile-bolstered wall subjected to h2o infiltration. Reinforcement strains and experience displacements ended up identified to minimize much more drastically with reduction of suction till a particular value of suction from which the charge of lowering declines.