Natural environment and bearing capacity of subgrade soil - correlation analysis of weather factors, underground factors and bearing capacity

The soil is continuously subject to the influence of the surrounding natural environment. In particular, the bearing capacity of subgrade soil (unsaturated soil) which varies with soil- moisture conditions is considered as being governed by natural environment. Therefore, quantitative determination of the factors of natural environment acting on the bearing capacity of subgrade soil is an important problem to be considered in pavement design. In the present study, one of various natural environment factors affecting roads, weather environment, including sunshine duration, air temperature, humidity, precipitation and evaporation, and underground environment, including the moisture content of subgrade soil, underground temperature and soil suction, were examined, and their secular changes and correlations were stochastically and statistically examined. Further, to evaluate the bearing capacity of subgrade soil, its variations were investigated by carrying out the repeated unconfined compression and CBR tests under the suction condition, and correlations between weather environment and underground environment were also investigated. As a result, it has been clarified that the soil suction is governed by the weather environment, such as sunshine duration, evaporation and air temperature, and that these factors also affect the bearing capacity of subgrade soil, such as the CBR value. This indicates the possibility of predicting the soil suction and the time series variations in the bearing capacity on the basis of the weather environment, provided that the type of soil and other conditions are not changed (a).


  • English

Media Info

  • Pagination: 497-516
  • Serial:
    • Volume: 2

Subject/Index Terms

Filing Info

  • Accession Number: 01438044
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 0909796076
  • Files: ATRI
  • Created Date: Aug 24 2012 9:20PM