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城市固体废弃物中竖向应力沿深度方向的变化规律是应用MSW沉降模型计算废弃物沉降的重要依据。本文采用了河海大学研制的MSW室内柱状沉降仪进行了人工配比的MSW填埋试验。在沉降桶的底部安装了荷载传感器,测出填埋层顶部所施加竖向荷载沿深度方向的变化值。推导出Powrie和Beaven在1999年得到的竖向有效应力沿深度方向的应力传递公式,计算出荷载沿深度方向分布的计算值。结果表明,实测值和计算值相当吻合。
The vertical variation of vertical stress in urban solid waste along the depth direction is an important basis for calculating the settlement of waste using the MSW sedimentation model. In this paper, MSW landfill sedimentation experiment was carried out by MSW indoor columnar sedimentation instrument developed by Hohai University. A load cell was installed at the bottom of the settler to measure the variation of the vertical load applied to the top of the buried layer along the depth. The stress transfer formula of vertical effective stress in the depth direction obtained by Powrie and Beaven was deduced in 1999, and the calculated value of load distribution in the depth direction was calculated. The results show that the measured and calculated values are in good agreement.