中文摘要：

软土微观结构的仿真几何模型是进行软土微观数值模拟的前提和基础。根据常规土工试验获得的土样孔隙比和各粒组含量百分比,采用蒙特卡罗方法生成一定数量的随机多边形单元代表软土微观结构中的各类结构单元体和孔隙,然后通过把它们随机分布到给定大小的区域中,建立了软土微观结构的随机几何模型。把上述方法应用到广东省某高速公路工程软土土样的微观结构仿真建模中,结果表明所建立的仿真几何模型与土样实际微观结构图像具有一定的相似度,验证了文中方法的可行性。

英文摘要：

Simulation geometric model of soft soil microstructure is the premise and foundation for micro numerical simulation of soft soil.According to the void ratio and the percent contents of each fraction obtained from conventional soil test,the Monte Carlo method is applied to generate a certain amount of random polygon elements to represent the various structure elements and pores of soil microstructure,the random geometric model of soft soil microstructure is established by distributing these polygons into a given size region randomly.By applying this method to the microstructure simulation modeling for the soft soil samples in a certain highway engineering in Guangdong Province,the result shows that the simulation geometric model has certain similarity with the actual microstructure image of the soil sample,the feasibility of proposed method is verified.