法国鲁昂试验路堤与大气相互作用数值模拟

 在土–大气相互作用的模型和计算方法的基础上，采用现场记录的气象数据，对法国鲁昂试验路堤中心轴线上的温度、体积含水量和吸力随气候的变化进行一维数值模拟，并与现场实测结果进行对比。数值计算模拟与现场实测结果的对比分析表明，计算所采用的模型是合适的，但需要设置合理的边界条件以及土性参数。另外，由于试验路堤的压实使得填土具有较低的渗透性(＜10－8 m/s)，因而该试验中大气降雨和蒸发对路堤含水量和吸力的影响主要局限于距离路堤表面一定深度范围内。

NUMERICAL SIMULATION OF INTERACTION BETWEEN ATMOSPHERE AND EXPERIMENTAL EMBANKMENT IN ROUEN, FRANCE

Unsaturated soil is often involved in geotechnical engineering. Its behavior is strongly affected by the interaction of soil and atmosphere. When climatic conditions change，the temperature，water content and suction of soil ground will change. An experimental embankment was constructed in Rouen，France，to study the embankment behavior under climatic effects. Based on the work of coupled soil-atmosphere modeling，the changes in temperature，volumetric water content and suction at central axis have been simulated from the meteorological data measured in the field. Comparison between the measurements and simulations shows the relevance of the adopted method，providing that suitable boundary conditions and soil parameters are taken into consideration. Moreover，both the simulation results and field monitoring results show that climatic effects are limited to a shallow depth，which are resulted from the low permeability(＜10－8 m/s of the compacted fill.