摘要
根据秦沈客运专线DK266+521路桥过渡段结构形式及过渡段的路基面纵向、横向的动应力测试结果,采用三维有限差分数值计算,模拟了动荷载作用下过渡段的沉降变形分别在线路纵向、横向及路基深度方向的变化规律及过渡段设置形式、材料刚度、过渡段的尺寸对沉降变形的影响。结果表明,正梯形过渡段的性能优于倒梯形过渡段;过渡段碎石刚度必须满足一定的要求;过渡段梯形上下底宽的变化对过渡段沉降的影响不明显。
Based on the construction form of transition zone and the longitudinal and transverse stresses measured from the DK266+521 bridge-subgrade transition in Qin-Shen passenger special line,the longitudinal,transverse and in-depth settlements of track transition under traveling load are analyzed by finite-difference program FLAC3D,and the settlement with different factors such as format,material stiffness,and dimension is also studied. The results show that:the engineering effect of track transition in trapezium form is better than in inverse trapezium form;the graded broken stone should be intensive enough;the size of trapezium has little effect on settlement.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2007年第S1期849-854,共6页
Rock and Soil Mechanics
关键词
路桥过渡段
数值模拟
动荷载
沉降
bridge-subgrade transition
numerical simulation
dynamic loading
settlement
