客运专线桥基高边坡稳定性三维有限元分析

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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。

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	张利国
	王春雷

关键词 ：客运专线, 桥基荷载, 高边坡, 三维有限元, ANSYS

Abstract：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.

Key words： passenger dedicated line bridge load high-steep slope three-dimensional finite element ANSYS

收稿日期: 2009-11-25

PACS:	213.1+3
	U238

作者简介: 张利国, 1970年出生, 男, 高级工程师;王春雷, 1978年出生, 男, 工程师。

引用本文:

张利国；王春雷. 客运专线桥基高边坡稳定性三维有限元分析[J]. 铁道工程学报, 2010, 27(2): 45-48.
ZHANG Li-Guo, WANG Chun-Lei. Three-Dimensional Finite Element Analysis of Stability of High-steep Slope under Load of Bridge of Passenger Dedicated Line. 铁道工程学报, 2010, 27(2): 45-48.

链接本文:

http://tdgcxb.crec.cn/CN/ 或 http://tdgcxb.crec.cn/CN/Y2010/V27/I2/45

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