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地表水及降雨入渗对巍山县某公路边坡稳定性影响

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利用MIDAS-GTS/NX软件对云南省巍山县某高速公路的边坡进行了数值仿真.通过镜像建模和模拟计算,分析了原始、降雨及降雨时采用单/双排抗滑桩加固后等多种情况下的边坡稳定性,展现了边坡破坏形态和变形趋势.结果表明:在初始工况下,边坡存在潜在的滑动,总体上是欠稳定的;在暴雨后,坡面下部土体已达到饱和状态,承载力进一步降低,使得坡面在水平和竖直方向都出现较大位移,边坡呈现不稳定状态,需进行加固处理;在降雨工况下,采用单/双排抗滑桩加固后的边坡稳定系数为2.43,边坡稳定,加固效果显著.同时表明MIDAS-GTS/NX有限元软件对多层土质边坡进行数值建模分析时,可以充分考虑到地表水渗流及降雨渗流等复杂条件对多层土质边坡稳定性的影响,其中SRM分析结果更加贴合实际工程计算结果.
Influence of Surface Water and Rainfall Infiltration on the Slope Stability of a Highway in Weishan County
The Midas-GTS/NX software is used to simulate the slope of a highway in Weishan County,Yunnan Province.Through the mirror modeling and the simulation,the stability of the slope is analyzed by strengthening the single and double rows of anti-slide pile,which indicating the failure pattern and the deformation trend of the slope.The results show that the potential sliding surface has occurred in the original working condition of the slope,and the entire slope is in an unstable state.After the rainstorm,the soil underneath the slope is in a saturated state,and the bearing capacity is further reduced,the slope is unstable because of the large displacement of the slope in both the horizontal and the vertical directions.Therefore,it is nec-essary to reinforce it.The factor of safety for the slope installed by the single/double-row anti-slip pile is 2.43 under the rain-fall condition,which indicating that the slope is stable,and the reinforcement effect is obvious.At the same time,it is shown that the Midas-GTS/NX finite element software can fully consider the influence of complex conditions such as surface water and rainfall infiltrations on the stability of the multi-layer soil slope.The SRM analysis results are consistent with the actual engi-neering estimation results.

Highway SlopeSurface Water InfiltrationRainfall InfiltrationFinite ElementMidas-GTS/NX

武邦芳、敖小兵、刁航

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中铁十二局集团市政工程有限公司,广州 511480

公路边坡 地表水入渗 降雨入渗 有限元 MIDAS-GTS/NX

2024

土工基础
湖北省土木建筑学会,中国科学院武汉岩土力学研究所,武汉市土木建筑学会

土工基础

影响因子:0.238
ISSN:1004-3152
年,卷(期):2024.38(2)
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