铁道标准设计Issue(8)：12-17,6.DOI:10.13238/j.issn.1004-2954.2014.08.003
高速铁路粗粒土路基沉降特征及预测研究
Study on Settlement Characteristics and Forecasting Method of Coarse-Grained Soil Subgrade of High-speed Railway
摘要
Abstract
The full-scale subgrade model of ballastless track was set up and a long-term monitoring was carried out by using single-point settlement meter, so as to analyze the settlement characteristics of coarse-grained soil subgrade of high-speed railway. The results showed that the settlement of subgrade with coarse-grained soil filling was mainly composed of these factors: the instantaneous compression deformation of subgrade filling, the rheological deformation of coarse-grained soils, the deformation caused by external loading, and so on. More specifically, the deformation of subgrade filling accounted for about 50% of the total settlement, the rheological deformation of coarse-grained soils accounted for about 40% of the total settlement. The results also showed that after the finish of subgrade filling, the proportion of rheological deformation of coarse-grained soils reached up to 80% of the total settlement, which means that the rheological deformation of coarse-grained soils dominates the final subgrade deformation. Further, according to the settlement characteristics of coarse-grained soil subgrade, a subgrade settlement forecasting function based on Kelvin rheological model was established, and the research showed that the settlement forecasting results based on Kelvin rheological model agreed better with the measured data. This method can provide references for the settlement forecasting of coarse-grained soil subgrade of high-speed railway.关键词
高速铁路/路基/沉降预测/流变特性Key words
high-speed railway/subgrade/settlement forecasting/rheological properties分类
交通工程引用本文复制引用
王启云,张家生,孟飞..高速铁路粗粒土路基沉降特征及预测研究[J].铁道标准设计,2014,(8):12-17,6.基金项目
高速铁路建造技术国家工程实验室基金项目(30120512) （30120512）
福建工程学院科研启动基金(GY-Z14003) （GY-Z14003）
