暗穴对黄土边坡稳定性的影响分析
详细信息 查看官网全文
- 英文论文题名：Analysis of the influence on loess slope stability of hidden holes
- 论文作者：陈志敏 ; 余云燕 ; 杨瑞
- 英文论文作者：Chen Zhimin ; Yu yunyan ; Yang rui ; Key Laboratory of Road & Bridges and Underground Engineering of Gansu Province ; Lanzhou Jiaotong University ; National and Provincial Joint Engineering Laboratory of Road & Bridge Disaster Prevention and Control ; Lanzhou Jiaotong University ; Xi'an Railway Survey and Design Institute Co. ; Ltd.
- 年：2016
- 作者机构：兰州交通大学甘肃省道路桥梁与地下工程重点实验室;兰州交通大学道桥工程灾害防治技术国家地方联合工程实验室;中铁西安勘察设计研究院有限责任公司;
- 论文关键词：黄土边坡 ; 暗穴 ; 稳定性 ; 强度折减
- 英文论文关键词：loess slope ; hidden hole ; stability ; strength reduction
- 会议召开时间：2016-09-05
- 会议录名称：2016年全国工程勘察学术大会论文集（上册）
- 英文会议录名称：Geotechnical Investigation & Surveying
- 语种：中文
- 分类号：TU444
- 学会代码：ZJKC
- 会议名称：2016年全国工程勘察学术大会
- 会议地点：中国山西太原
- 主办单位：全国建筑工程勘察科技情报网、全国建筑工程勘察科技情报网华北情报站、中国建筑学会工程勘察分会
- 学会名称：中国建筑学会工程勘察分会
- 页数：7
- 文件大小：1421k
- 原文格式：O
- 会议级别：全国
摘要
黄土暗穴在黄土地区作为一种独特的地质现象,会严重影响黄土边坡的稳定性,造成不利的影响。本文通过开展不同暗穴洞径、暗穴坡面距、暗穴位置对边坡稳定性的对比研究。研究表明暗穴在坡底时对边坡影响最大,暗穴洞径增大,边坡安全系数越小;坡顶暗穴对边坡起减载效应,且洞径越大,减载效应越明显。暗穴在不同位置时,随着坡面距逐渐增加,边坡安全系数都是呈现先减小后增大的趋势;随着暗穴从坡顶降至坡底,坡顶滑动面出口位置与坡面距离逐渐增大。
As a special geological phenomenon in loess area,loess-hidden holes could influence the stability of a loess slope seriously and the adverse effects might occur.In this paper,the slope stabilities were compared based on different hole diameters,slope distances and positions of loess hidden holes.The results show that the hidden holes have the greatest impact when they are at the bottom of the slope.Slope safety coefficient decreases with the increase of the hole diameter.The holes in the top of the slope have the unloading effect for the stability of the slope.The main influencing factor of the unloading effect is hole diameter.When the holes are at different positions,the slope safety coefficient always presents the trend of decreasing firstly and then increasing with the increase of slope distance.The distance between location of sliding surface on the slope top and the slop surface increases with the position of the holes down from top to bottom.
As a special geological phenomenon in loess area,loess-hidden holes could influence the stability of a loess slope seriously and the adverse effects might occur.In this paper,the slope stabilities were compared based on different hole diameters,slope distances and positions of loess hidden holes.The results show that the hidden holes have the greatest impact when they are at the bottom of the slope.Slope safety coefficient decreases with the increase of the hole diameter.The holes in the top of the slope have the unloading effect for the stability of the slope.The main influencing factor of the unloading effect is hole diameter.When the holes are at different positions,the slope safety coefficient always presents the trend of decreasing firstly and then increasing with the increase of slope distance.The distance between location of sliding surface on the slope top and the slop surface increases with the position of the holes down from top to bottom.
引文
[1]李喜安.黄土暗穴的成因及其公路工程灾害效应研究[D].西安:长安大学2004.Li Xi-an.Study on the causes and effects of highway engineering disasters of loess hidden holes[D].xi'an Chang'an University,2004(in Chinese)
[2]李治财,刘高.黄土滑坡与黄土洞穴的相关性及相互作用机理[J].兰州大学学报(自然科学版),2014,50(1):21-25.Li Zhicai,Liu Gao.Correlation and interaction mechanism between loess landslides and loess caves[J].Journal of Lanzhou University(NATURAL SCIENCES),2014,50(1):21-25.(in Chinese)
[3]李喜安,黄润秋,李荣建等.暗穴环境下非饱和黄土边坡稳定性分析[J].工程地质,2014,22(3):366-371.Li Xian,Huang Runqiu,Li Rongjian et al.Fem stability analysis of loess slope with tunneling erosion[J].Engineering geology,2014,22(3):366-371.(in Chinese)
[4]范敏,倪万魁.黄土高原地区公路路基土性参数统计分析[J].地球科学与环境学报,2006,28(2):75-79.Fan Min,Ni Wankui.Statistical analysis on loess parameter of highway subgrade in loess plateau area[J].Journal of Earth Sciences and Environment,2006,28(2):75-79.(in Chinese)
[5]李炜,郑南翔,支喜兰等.黄土路堑高边坡断面形式研究[J].公路交通科技(应用技术版),2007(10):68-71.Li Wei,Zheng Nanxiang,Zhi Xilan et al.Study on the high slope of loess cutting section[J].Highway traffic science and Technology(Application Technology),2007(10):68-71.(in Chinese)
[6]李萍,黄丽娟,李振江等.甘肃黄土高边坡可靠度研究[J].岩土力学,2013,34(3):811-817.Li Ping,Huang Lijuan,Li Zhenjiang et al.Study of reliability for loess high slopes in Gansu area[J].Rock and Soil Mechanics,2013,34(3):811-817.(in Chinese)
[7]王新建,母霓莎,吴琦.新黄土物理力学性质指标统计特征[J].公路工程,2014,39(1):88-93.WangXinjian,Mu Nisha,Wu Qi.Statistical characteristics of physico-mechanical indices of the new loess[J].Highway Engineering,2014,39(1):88-93.(in Chinese)
[8]张鲁渝,郑颖人,赵尚毅等.有限元强度折减系数法计算土坡稳定安全系数的精度研究[J].水利学报,2003(1):21-26.Zhang Luyu,Zheng Yingren,Zhao Shangyi et al.The feasibility study of strength-reduction method with FEM or calculating safety factors of soil slope stability[J].Journal of Hydraulic Engineering,2003(1):21-26.(in Chinese)
[9]刘祖典.黄土力学与工程[M].西安:陕西科学技术出版社,1997.Liu Zudian.Loess Mechanics and Engineering[M].Xi'an:Shanxi Science and Technology Press,1977(in Chinese)
[2]李治财,刘高.黄土滑坡与黄土洞穴的相关性及相互作用机理[J].兰州大学学报(自然科学版),2014,50(1):21-25.Li Zhicai,Liu Gao.Correlation and interaction mechanism between loess landslides and loess caves[J].Journal of Lanzhou University(NATURAL SCIENCES),2014,50(1):21-25.(in Chinese)
[3]李喜安,黄润秋,李荣建等.暗穴环境下非饱和黄土边坡稳定性分析[J].工程地质,2014,22(3):366-371.Li Xian,Huang Runqiu,Li Rongjian et al.Fem stability analysis of loess slope with tunneling erosion[J].Engineering geology,2014,22(3):366-371.(in Chinese)
[4]范敏,倪万魁.黄土高原地区公路路基土性参数统计分析[J].地球科学与环境学报,2006,28(2):75-79.Fan Min,Ni Wankui.Statistical analysis on loess parameter of highway subgrade in loess plateau area[J].Journal of Earth Sciences and Environment,2006,28(2):75-79.(in Chinese)
[5]李炜,郑南翔,支喜兰等.黄土路堑高边坡断面形式研究[J].公路交通科技(应用技术版),2007(10):68-71.Li Wei,Zheng Nanxiang,Zhi Xilan et al.Study on the high slope of loess cutting section[J].Highway traffic science and Technology(Application Technology),2007(10):68-71.(in Chinese)
[6]李萍,黄丽娟,李振江等.甘肃黄土高边坡可靠度研究[J].岩土力学,2013,34(3):811-817.Li Ping,Huang Lijuan,Li Zhenjiang et al.Study of reliability for loess high slopes in Gansu area[J].Rock and Soil Mechanics,2013,34(3):811-817.(in Chinese)
[7]王新建,母霓莎,吴琦.新黄土物理力学性质指标统计特征[J].公路工程,2014,39(1):88-93.WangXinjian,Mu Nisha,Wu Qi.Statistical characteristics of physico-mechanical indices of the new loess[J].Highway Engineering,2014,39(1):88-93.(in Chinese)
[8]张鲁渝,郑颖人,赵尚毅等.有限元强度折减系数法计算土坡稳定安全系数的精度研究[J].水利学报,2003(1):21-26.Zhang Luyu,Zheng Yingren,Zhao Shangyi et al.The feasibility study of strength-reduction method with FEM or calculating safety factors of soil slope stability[J].Journal of Hydraulic Engineering,2003(1):21-26.(in Chinese)
[9]刘祖典.黄土力学与工程[M].西安:陕西科学技术出版社,1997.Liu Zudian.Loess Mechanics and Engineering[M].Xi'an:Shanxi Science and Technology Press,1977(in Chinese)