软岩填筑路基沉降特征的参数影响研究

Study on Influence of Parameters of Settlement Characteristics of Soft Rock Subgrade

运用PLAXIS软件对软岩填筑路基的沉降进行了数值模拟计算,分析了不同因素影响下的路基沉降规律。结果表明:高填方软岩填筑路堤的沉降受到路堤填土高度、湿化条件、上部荷载作用等因素影响较为显著。其中,路堤高度增加,最终沉降量增大,增幅递增;上部荷载越大,沉降量越大,增幅递增;软岩在最优含水率时沉降最小。

Numerical simulation calculation was carried out on the settlement of the soft rock subgrade by PLAXIS software and the settlement law of the subgrade under the influence of different factors was analyzed. The results showed that the settlement of high-fill soft rock embankment is significantly affected by such factors as embankment filling height, humidification conditions and upper load, etc, among which, the height of the embankment increases, the final settlement increases, with increasing amplification. The larger the upper load, the larger the settlement, with increasing amplification;the duck leg rock filler has the smallest settlement at the optimum water content.