粘土地盤における盛土に伴う側方流動圧の簡易予測法(<小特集>側方変位・流動の予測と対策)

概要

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In order to simply predict the lateral flow pressure in clay foundation ground acting a embankment load, a chart giving the influence values of the horizontal stress induced by a symmetric embankment load was provided using the Boussinesq's solution, which is widely used for estimating stresses induced by additional loads in foundation ground in design because of its simplicity. However, this solution based on an elasticity theory has many assumptions different from the characteristics of natural soils and deformation conditions of actual ground installed retaining structures. Moreover, the lateral flow pressure in the actual clay ground is strongly influenced by the construction speed of embankment. In order to investigate the effects of these factors, laboratory model test were carried out for the different conditions of construction speed and shape of embankment. Comparing the theoretical and experimental results, a method for modifying the theoretical distribution of the horizontal stress based on the Boussinesq's solution was proposed. It was also confirmed that the lateral flow pressure predicted by this method almost agrees with the measured values.
社団法人地盤工学会の論文
2002-02-01