欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
采用动力有限差分数值计算方法，针对列车荷载作用下，宜万铁路白云山隧道穿越大型溶腔段连拱隧道结构动力响应问题进行计算分析，并进一步基于DingqingLi塑性应变模型，探讨列车长期反复荷载作用下岩溶地基的累积沉降变形计算方法。研究结果表明：穿越大型溶腔的白云山隧道连拱结构段，各典型位置受列车荷载振动影响不明显，最大拉压应力峰值和位移变形均小于结构材料的设计值和正常使用允许值；隧底岩溶地基在列车长期荷载反复作用100a后，累积塑性变形小于20mm，能够满足列车高速运行对线路平顺性的要求，不会对列车长期运营造成破坏性影响。
英文摘要：
Using the dynamic finite difference method, the dynamic response of double arch tunnel in Kast region of Baiyunshan tunnel on Yichang--Wanzhou railway was analyzed. The calculating method of the cumulative deformation of Kast foundation under long-term train loading was discussed further based on Dingqing Li plastic strain model. The results show that the vibration of typical positions of Baiyunshan double arch tunnel in Kast region is small, and both the tensile and compressive peak value and the displacement are less than the design values; Under the long-term train loading （i.e. 100 a）, the cumulative plastic deformation of Kast foundation is less than 20 mm, which can satisfy the smooth requirement of line to high speed train.
同期刊论文项目
同项目期刊论文
期刊信息
位置：