Traffic-load-induced permanent deformation of road on soft subsoil
Traffic-load-induced permanent deformation of road on soft subsoil
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DOI：
10.1061/(asce)1090-0241(2002)128:11(907
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发表时间：
2002-11-01
影响因子：
3.9
通讯作者：
Miura, N
中科院分区：
文献类型：
--
作者：
Chai, JC;Miura, N
提出了一种预测低路堤软土地基上道路交通荷载引起的沉降的方法。采用多层弹性理论(本文未涉及)计算交通荷载作用下地基土的动应力。在此基础上，利用与地基物理力学性质相关的经验公式计算了地基中的塑性竖向应变。该方法被应用于日本佐贺的三个不同案例的分析。计算值与现场数据的对比表明，该方法能较好地预测低路堤软土地基上交通荷载引起的道路永久沉降。该方法对软土地基上低路堤道路的设计具有一定的参考价值。对于路堤厚度为0.75~2.7m的情况，受交通荷载影响较大的深度在路基以下约为6。
A method for predicting the traffic-load-induced settlement of road on soft subsoil with a low embankment is proposed. The traffic-load-induced dynamic stress in subsoil is calculated by the multilayer elastic theory (not covered in this paper). Then the plastic vertical strain in subsoil is calculated by an empirical equation, in which constants are related to the physical and mechanical properties of subsoil. The method was applied to analyze three different cases in Saga, Japan. Comparisons of the calculated values with field data indicate that the proposed method can provide a reasonable prediction of traffic-load-induced permanent settlement of the road on soft subsoil with a low embankment. The method is useful for designing the road with a low embankment on soft subsoil. For the cases studied with embankment thickness of 0.75 to 2.7 m, the depth significantly influenced by traffic load is about 6 in below the base of the embankments.