考虑流固相互作用的加筋土路基力学行为研究

The Study of Mechanic Characteristic of Reinforced Subgrade Considering the Interaction between Fluid and Solid

分析了在考虑土体中流体与土体相互作用情况下加筋土路基的力学行为,先利用Biot固结理论说明了土体中流体与土体相互作用的机理,再通过数值计算比较在考虑流固相互作用及不考虑流固相互作用两种情况下,路基的侧向位移、沉降、土体中应力变化及筋材的应变等特点,并与试验路的测试数据相比较,结果表明,考虑流固相互作用的分析与实际情况更相吻合。所以,在今后的加筋土路基的力学行为分析中,应计入流固相互作用的影响,研究成果对加筋土路基的工程实际有一定的指导作用。

This article analyses the mechanic characteristic of reinforced subgrade considering the interaction between fluid and solid, At first, this article declares the mechanism of this interaction by Blot consolidation theory, then it compares the lateral displacements, settlements of subgrade, the variety of stress in the soil and the strain of reinforcement by numerical calculation considering the interaction between fluid and solid or not, and these outcomes are compared with the obtained data of a test road. The conclusion is ： the outcomes which consider the interaction between fluid and solid are more consistent with the test ones. So, the interaction between fluid and solid should be considered when analyzing the mechanic characteristic of reinforced subgrade henceforth. These conclusions can be used to guide real reinforced subgrades engineering.