客运专线桥基高边坡稳定性三维有限元分析  

Three-Dimensional Finite Element Analysis of Stability of High-steep Slope under Load of Bridge of Passenger Dedicated Line

作　　者：张利国[1] 王春雷[1] 

机构地区：[1]铁道第三勘察设计院集团有限公司,天津300142

出　　处：《铁道工程学报》2010年第2期45-48,共4页Journal of Railway Engineering Society

摘　　要：研究目的:拟建的某铁路客运专线经过地段山高谷深,沟壑纵横,形成了一些桥梁墩台基础置于高陡岸坡上的高边坡工程。桥基荷载作用下高陡边坡的稳定性分析目前没有公认合理的方法。以某铁路客运专线桥基高边坡为例,运用ANSYS有限元分析软件,对荷载作用下的高边坡岩体力学行为特征和稳定性进行三维有限元分析,研究结果可为桥梁高边坡设计及稳定性评价提供参考。研究结论:结果表明,荷载对坡面岩体应力的影响很小,边坡的位移量很小,仅左岸坡脚处较小范围内发生塑性破坏,其它地方均无塑性破坏区。在目前的设计条件下,大桥左右岸边坡安全系数分别为1.85和2.20,大桥边坡整体是稳定的。Research purposes： One Passenger Dedicated Line to be built will pass through the high mountain with deep valley and interlaced gully, so some pier foundations will be located on high - steep slopes. However, nowadays there is no generally accepted and reasonable method for analysis of the stability of high - steep slope under bridge load. In this paper, the analysis of mechanical behavior and stability of rock mass of high - steep slope under load is made with ANSYS in detail, and the results can provide some reference to design of high - steep slope and evaluation of its stability under bridge load. Research conclusions：The results show that bridge load has little effect on the stress of rock mass of slope, and the slope displacement is very small. The plastic failure zone mainly occurred at a small area of basal slope of left bank, and there was no plastic failure zone in other places. The safety factor of the left and the right banks of the high - steep slope under bridge load is 1.85 and 2.20 separately, and the high - steep slope of the bridge is entirely steady at present.

关 键 词：客运专线 桥基荷载 高边坡 三维有限元 ANSYS 

分 类 号：U213.157[交通运输工程—道路与铁道工程] U238