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采用能够同时考虑主次固结变形的Yin-Graham一维弹黏塑性模型,对三角形周期荷载作用下软土路堤运行期间和运行期结束时的长期沉降进行了理论分析,获得三角形周期荷载作用下软基路堤运行期结束时的总沉降计算公式和工后沉降计算公式。分析了三角形周期荷载作用下软基不考虑流固耦合与考虑流固耦合时长期沉降之间的相互关系,证明了三角形周期荷载作用下当循环荷载次数趋向于无穷大时软基具有最终沉降量与应力随时间增长的模式无关的性质。按照文中提供的总沉降计算公式,针对具体工程的土工参数,对路堤运行期结束时的总沉降量进行了计算,并由此确定运行期开始时软基应发生的沉降量,为合理确定高速公路路面铺筑时机提供沉降标准。
Using the Yin-Graham one-dimensional elastic-viscoplastic model, which can take into account the primary and secondary consolidation deformations, the long-term settlement during the operation and the end of the soft soil embankment subjected to cyclic loading of the triangle is theoretically analyzed. The cyclic loading is obtained under the triangular cyclic loading Calculation formula of total settlement and post-construction settlement at the end of soft soil embankment operation period. The relationship between the fluid-solid coupling and the long-term settlement considering the fluid-structure interaction is analyzed under the cyclic load of the triangle. It is proved that the cyclic settlement of the soft foundation with the ultimate settlement of The mode-independent nature of stress over time. According to the calculation formula of total settlement provided in this article, according to the geotechnical parameters of specific engineering, the total settlement at the end of embankment operation period is calculated, and the settlement of soft foundation should be determined at the beginning of operation period. Road paving time to provide settlement standards.