Study on Analysis of Subsidence and Settlement of Soft Ground caused by Repeated Loading

本文收集整理了大量软土地基在反复荷载和循环荷载作用下的沉降实例，概述了软土地基循环沉降的机理，提出了一种预测软土地基地震沉降的方法。采用适合现场实际情况的参数进行了数值计算，并在此基础上用计算机程序对该方法的适用性进行了标定。提出了一种用于海床土体波浪沉降量预测的分析方法和计算机程序。同时，该解析法也可应用于波浪荷载作用下海床稳定性的估算。两种数值方法的计算结果与佐贺-白石和冈崎平原的试验结果吻合较好。

We have collected and classified many case studies on the settlements in soft ground under repeated and cyclic loading.We have outlined a mechanism for cyclic-induced settlement in soft ground.We have proposed a procedure for predicting earthquake-induced settlements. The applicability of the method has been calibrated with a computer program based on the proposed analytical procedure with numerical calculations using parameters suitable for actual field conditions.An analytical procedure together with a computer program has been proposed for the prediction of wave-induced settlements of seabed soil. It should also be noted that the analytical method can be applied to the estimation of the stability of the seabed under wave loading.We have proposed a method for one-dimensional consolidation settlement analysis with change of groundwater level. The calculated results of two numerical methods fits well with the experimental results in Saga-Shiraishi and Okazaki Plains.