A simple method to predict traffic-load-induced permanent settlement of road on soft subsoil
A simple method to predict traffic-load-induced permanent settlement of road on soft subsoil
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发表时间：
2009
影响因子：
1.5
通讯作者：
Huang Mao-song
中科院分区：
文献类型：
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作者：
Huang Mao-song
交通荷载引起的软土地基上道路的过度沉降是导致路面破坏的主要原因。正确预测这部分沉降对道路设计具有重要意义。根据试验结果，提出了一个适用于软粘土的重复荷载作用下残余应变预测的简单经验模型。上海软土的动三轴试验结果验证了模型的有效性。对于实际的边值问题，采用多层弹性理论计算交通荷载引起的动应力，采用该模型计算交通荷载引起的地基残余应变分布，再将残余应变沿深度沿着积分得到沉降量。最后以佐贺机场路为例进行了实例分析。
Excessive settlement of road on soft subsoil induced by traffic load is the main reason leading to pavement failure. To predict this part of settlement correctly is very important for road design. A simple empirical model for predicting residual strain under repeated load suitable for soft clays is proposed based on test results. The validity of the model is verified by cyclic triaxial test results of Shanghai soft clays. For practical boundary value problems, the traffic-load-induced dynamic stress is calculated by multilayer elastic theory; the residual strain distribution of subsoil induced by traffic load is calculated by the proposed model; and then the settlement can be given by integrating the residual strain along depth. A practical problem, Saga Airport Road, is analyzed to illustrate the proposed prediction method.