土石混合路堑边坡稳定分析
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摘要
江苏340省道南京段改扩建工程团山垭口路段路堑边坡上部III级边坡为典型岩、土混合边坡,客观上存在下伏中风化岩表面软弱结构面稳定与土石互层堆积物的整体滑动稳定问题。文章分别运用无限边坡分析模型和强度折减法数值分析验算了该边坡的稳定性,揭示了软弱结构面和土石互层堆积物边坡整体稳定良好,并提出了双重稳定分析控制原则,为简单放坡护坡方案提供了依据。
With the III-level slope at the upper cutting slope of Tuanshanyakou section of 340 provincial highway Nanjing Segment reconstruction and expansion project in Jiangsu Province as the typical rock and soil mixed slope,there is objectively the stability problem of weak structural surface at underlying weathered rock surface and the overall sliding stability problem of interbedded rock-soil layer deposits.This article checks the stability of this slope through numerical analysis of infinite slope analysis model and strength reduction method,reveals the good overall slope stability at weak structural surface and at interbedded rock-soil layer deposits,and proposes the double stability analysis control principle,thereby providing the basis for the simple grading and slope protection scheme.
With the III-level slope at the upper cutting slope of Tuanshanyakou section of 340 provincial highway Nanjing Segment reconstruction and expansion project in Jiangsu Province as the typical rock and soil mixed slope,there is objectively the stability problem of weak structural surface at underlying weathered rock surface and the overall sliding stability problem of interbedded rock-soil layer deposits.This article checks the stability of this slope through numerical analysis of infinite slope analysis model and strength reduction method,reveals the good overall slope stability at weak structural surface and at interbedded rock-soil layer deposits,and proposes the double stability analysis control principle,thereby providing the basis for the simple grading and slope protection scheme.
引文
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[2]Zienkiewicz O C,Humpheson C,Lewis R W.Associated and non-associated visco-plasticity and plasticity in soil mechanics[J].Geotechnique,1975,25(4):671-689.
[3]秦刚.海岛滑坡灾害预测的数值分析研究[D].福州:福州大学,2006.
[4]卢达.基于赤平投影法的岩质边坡稳定性分析[J].铁道建筑,2010(11):69-71.
[5]王俊,黄润秋,聂闻,等.基于无限边坡算法的降雨型滑坡预警系统的模型试验研究[J].岩土力学,2014,35(12):3503-3510.
[6]连保金.流态型滑坡破坏前兆及破坏运移机理研究[D].成都:成都理工大学,2017.
[7]李海亮,黄润秋,吴礼舟,等.非均质土坡降雨入渗的耦合过程及稳定性分析[J].水文地质工程地质,2013,40(4):70-76.
[8]李永亮,周国胜,李永鹏.有限元强度折减法边坡失稳判据的适用性研究[J].水利与建筑工程学报,2018,16(5):125-129.
[9]李建国,汪稔,虞海珍,等.初始主应力方向对钙质砂动力特性影响的试验研究[J].岩土力学,2005,26(5):723-727.
[10]李春忠,陈国兴,樊有维.基于ABAQUS的强度折减有限元法边坡稳定性分析[J].防灾减灾工程学报,2006,26(2):207-212.
[11]张绪涛.ABAQUS强度折减法在边坡稳定分析中的应用[J].人民长江,2009,40(9):62-64.
[12]刘忠玉,马崇武.降雨入渗条件下无限边坡的稳定性分析[J].郑州大学学报(工学版),2007,28(3):27-30.
[13]阎宗岭.堆石体物理力学特性及其工程应用研究[D].重庆:重庆大学,2003.
[14]王刚,叶沁果,查京京.珊瑚礁砂砾料力学行为与颗粒破碎的试验研究[J].岩土工程学报,2018,40(5):802-810.
[15]商翔宇.不同应力水平深部粘土力学特性研究[D].徐州:中国矿业大学,2009.
[16]钱春杰,李忠平,谭风雷,等.珊瑚砂填料强度特征试验研究[J].公路交通科技(应用技术版),2018(1):133-136.
[17]谭风雷.重塑饱和珊瑚礁砂动力响应试验研究[D].南京:东南大学,2017.