高密度电法在不稳定斜坡勘察治理中的应用
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摘要
为查明湖南杨村一带因碎石、土体常年废弃堆积形成的不稳定斜坡的规模大小,采用高密度电法对其厚度和滑动界面进行了探测。根据土体和下伏基岩电阻率差异特征,对测量成果进行了推断解释;同时,以60Ω·m为异常上限,圈化了内部滑动界面。通过钻探验证,在20/L2测点揭露土体厚度为27.2m,物探推断厚度为24.0m,准确度达88.2%;在32/L3测点处揭露0~4.5m为含水土体和强风化碎石,与物探成果显示的浅表层状低阻十分吻合。由此说明,在探测目标层与基岩电性差异明显的情况下,通过高密度电阻率法测量可有效查明控滑控崩界面,可为地质灾害危险性评估和后期治理提供参考依据。
In order to obtain the information about the slope scale,the high density apparent resistivity method is used to ascertain the thickness and slipping interface of the unstable slope created by the soil and rocks abandon for many years in Yangcun Village in Hunan Province.Together with slipping interface sketching by the lower limit of 60Ω·m,the geophysical interpretations are carried out through the analysis on the electrical properties of soil mass and rocks.After the drilling,it is found that the actual thickness of the soil mass near the station 20/L2 is 27.2 m,comparing to the thickness 24.0 m from the geophycial testing conclusion with the accuracy of 88.2%.Soil and crashed rocks are explored at the depth from 0 to 4.5 m below the station 32/L3,which is matched very well with the shallow low-resistivity anomaly by geophycial method.All of above indicates the effectiveness of surveying unstable slope by the imaging method with high density resistivity on condition of overwhelming differences of electrical characters of target layer and bedrocks,which could provide the reference for the danger assessing and the further harnessing on geological disasters.
In order to obtain the information about the slope scale,the high density apparent resistivity method is used to ascertain the thickness and slipping interface of the unstable slope created by the soil and rocks abandon for many years in Yangcun Village in Hunan Province.Together with slipping interface sketching by the lower limit of 60Ω·m,the geophysical interpretations are carried out through the analysis on the electrical properties of soil mass and rocks.After the drilling,it is found that the actual thickness of the soil mass near the station 20/L2 is 27.2 m,comparing to the thickness 24.0 m from the geophycial testing conclusion with the accuracy of 88.2%.Soil and crashed rocks are explored at the depth from 0 to 4.5 m below the station 32/L3,which is matched very well with the shallow low-resistivity anomaly by geophycial method.All of above indicates the effectiveness of surveying unstable slope by the imaging method with high density resistivity on condition of overwhelming differences of electrical characters of target layer and bedrocks,which could provide the reference for the danger assessing and the further harnessing on geological disasters.
引文
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[14]祁民,张宝林,梁光河等.高分辨率预测地下复杂采空区的空间分布特征——高密度电法在山西阳泉某复杂采空区中的初步应用研究[J].地球物理学进展,2006,(1):256~262.Qi Ming,Zhang Baolin,Liang Guanghe et al.High-resolution prediction of space distribution characteristics of complicated underground cavities—preliminary application of high density electrical technique in an area of Yangquan,Shanxi[J].Progress in Geophysics,2006,(1):256~262.(in Chinese)
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[16]李好.高密度电法和瞬态瑞利波法在长江沿岸滑坡探测中的综合应用[J].工程勘察,2015,43(5):83~91.Li Hao.Comprehensive application of high density resistivity method and transient rayleigh wave method to survey landslides along the Yangtze River[J].Geotechnical Investigation&Surveying,2015,43(5):83~91.(in Chinese)
[17]张光保.褚家营巨型滑坡的高密度电法勘察及效果分析[J].地球物理学进展,2012,27(6):2716~2721.Zhang Guangbao.Exploration and effectiveness analysis of high density resistivity method on Chujiaying landslide site[J].Progress in Geophysics,2012,27(6):2716~2721.(in Chinese)
[18]尚耀军.高密度电法在贵州金沙某滑坡勘察中的应用[J].工程地球物理学报,2013,10(6):771~776.Shang Yaojun.Application of high density resistivity method in landslide investigation of Jinsha,Guizhou[J].Chinese Journal of Engineering Geophysics,2013,10(6):771~776.(in Chinese)
[19]孔繁良,陈超,孙冠军.高密度电法在清江水布垭库区滑坡调查中的应用[J].工程地球物理学报,2008,5(2):201~204.Kong Fanliang,Chen Chao,Sun Guanjun.Application of multi-electrical method to landslide investigation in Qingjiang Shuibuya Reservor[J].Chinese Journal of Engineering Geophysics,2008,5(2):201~204.(in Chinese)
[20]程志平.电法勘探教程[M].北京:冶金工业出版社,2007:1~3.Cheng Zhiping.Principle and method of electrical prospecting[M].Beijing:Metallurgical Industry Press,2007:1~3.(in Chinese)
[21]蔡晶晶,阎长虹,王宁等.高密度电法在地铁岩溶勘察中的应用[J].工程地质学报,2011,19(6):935~940.Cai Jingjing,Yan Changhong,Wang Ning et al.Application of high density resistivity method to karst investigation of metroengineering[J].Journal of Engineering Geology,2011,19(6):935~940.(in Chinese)
[22]郑冰,李柳德.高密度电法不同装置的探测效果对比[J].工程地球物理学报,2015,12(1):33~39.Zheng Bing,Li Liude.The exploration effective comparison of different settings in resistivity tomography[J].Chinese Journal of Engineering Geophysics,2015,12(1):33~39.(in Chinese)
[23]柳建新,曹创华,郭荣文等.不同装置下的高密度电法测深试验研究[J].工程勘察,2013,41(4):85~89.Liu Jianxin,Cao Chuanghua,Guo Rongwen et al.Experimental study on the sounding with high density resistivity method by using different devices[J].Geotechnical Investigation&Surveying,2013,41(4):85~89.(in Chinese)
[2]郭果,陈筠,李明惠等.土质滑坡发育概率与坡度间关系研究[J].工程地质学报,2013,21(4):607~612.Guo Guo,Chen Jun,Li Minghui et al.Statistic relationship between slop gradient and land-slide probability in soil slopes around reservoir[J].Journal of Engineering Geology,2013,21(4):607~612.(in Chinese)
[3]徐永年.土质条件对坡体崩塌的影响[J].中国地质灾害与防治学报,1999,(4):8~15.Xu Yongnian.Influence of earth condition on avalanche[J].The Chinese Journal of Geological Hazard and Control,1999,(4):8~15.(in Chinese)
[4]张春红,李宽,苗卫明等.不同土体厚度的泥石流启动研究[J].陕西水利,2013,(3):150~151.Zhang Chunhong,Li Kuan,Miao Weiming et al.Studies on debris flows with soils of different thickness[J].Shaanxi WaterResources.2013,(3):150~151.(in Chinese)
[5]阳岳龙,周群,林剑.湖南主要地质灾害与地形地貌之关系[J].灾害学,2007,(3):36~40.Yang Yuelong,Zhou Qun,Lin Jian.The relationship between main geological hazards and topography in Hunan[J].Journal of Catastrophology,2007,(3):36~40.(in Chinese)
[6]向阳,李玉冰,易利等.排列方式及电极距对高密度电法异常响应的影响分析[J].工程地球物理学报,2011,8(4):426~427.Xiang Yang,Li Yubing,Yi Li et al.The effect of array and electrode sapcing on abnormal response of high density resistivity method[J].Chinese Journal of Engineering Geophysics,2011,8(4):426~427.(in Chinese)
[7]严加永,孟贵祥,吕庆田等.高密度电法的进展与展望[J].物探与化探,2012,36(4):576~584.Yan Jiayong,Meng Guixiang,Lv Qingtian et al.The progress and prospect of the high electrical resistivity imaging survey[J].Geophysical and Geochemical Exploration,2012,36(4):576~584.(in Chinese)
[8]董浩斌,王传雷.高密度电法的发展与应用[J].地学前缘,2003,(1):171~176.Dong Haobin,Wang Chuanlei.Development and application of2D resistivity imaging surveys[J].Earth Science Frontiers,2003,(1):171~176.(in Chinese)
[9]冯松涛,张晓峰,王显详等.高密度电法在城市轨道基岩突起区勘察中的应用研究[J].工程勘察,2017,45(12):70~74.Feng Songtao,Zhang Xiaofeng,Wang Xianxiang et al.Application of high density electrical method in bedrock protrusions area in urban railway survey works[J].Geotechnical Investigation&Surveying,2017,45(12):70~74.(in Chinese)
[10]程邈,傅焰林,李振宇.高密度电法在查明潜伏断裂中的应用[J].工程地球物理学报,2011,8(4):417~420.Cheng Miao,Fu Yanlin,Li Zhenyu.Application of high density resistivity method to hidden fault investigation[J].Chinese Journal of Engineering Geophysics,2011,8(4):417~420.(in Chinese)
[11]杨湘生.高密度电法在湘西北岩溶石山区找水中的应用[J].湖南地质,2001,(3):230~232,236.Yang Xiangsheng.Application of high density E-Phase method for prospecting underground water in karst mountain area in northwestern Hunan[J].Hunan Geology,2001,(3):230~232,236.(in Chinese)
[12]陈松,陈长敬,李小彬等.充电法和高密度电法在典型岩溶区勘查中的应用分析[J].工程地球物理学报,2017,14(1):6~12.Chen Song,Chen Changjing,Li Xiaobin et al.The application analysis of charging and high density resistivity methods to prospecting of typical karst areas[J].Chinese Journal of Engineering Geophysics,2017,14(1):6~12.(in Chinese)
[13]张光保.高密度电法在复杂岩溶地区路基勘测中的应用[J].工程地球物理学报,2010,7(3):344~347.Zhang Guangbao.Application of high-density electrical technique to karst roadbed in complex areas[J].Chinese Journal of Engineering Geophysics,2010,7(3):344~347.(in Chinese)
[14]祁民,张宝林,梁光河等.高分辨率预测地下复杂采空区的空间分布特征——高密度电法在山西阳泉某复杂采空区中的初步应用研究[J].地球物理学进展,2006,(1):256~262.Qi Ming,Zhang Baolin,Liang Guanghe et al.High-resolution prediction of space distribution characteristics of complicated underground cavities—preliminary application of high density electrical technique in an area of Yangquan,Shanxi[J].Progress in Geophysics,2006,(1):256~262.(in Chinese)
[15]肖敏,陈昌彦,白朝旭等.北京地区浅层采空区高密度电法探测应用分析[J].工程地球物理学报,2014,11(1):29~35.Xiao Min,Chen Changyan,Bai Chaoxu et al.Analysis and application of shallow underground goaf detection using highdensity electrical method in Beijing[J].Journal of Engineering Geophysics,2014,11(1):29~35.(in Chinese)
[16]李好.高密度电法和瞬态瑞利波法在长江沿岸滑坡探测中的综合应用[J].工程勘察,2015,43(5):83~91.Li Hao.Comprehensive application of high density resistivity method and transient rayleigh wave method to survey landslides along the Yangtze River[J].Geotechnical Investigation&Surveying,2015,43(5):83~91.(in Chinese)
[17]张光保.褚家营巨型滑坡的高密度电法勘察及效果分析[J].地球物理学进展,2012,27(6):2716~2721.Zhang Guangbao.Exploration and effectiveness analysis of high density resistivity method on Chujiaying landslide site[J].Progress in Geophysics,2012,27(6):2716~2721.(in Chinese)
[18]尚耀军.高密度电法在贵州金沙某滑坡勘察中的应用[J].工程地球物理学报,2013,10(6):771~776.Shang Yaojun.Application of high density resistivity method in landslide investigation of Jinsha,Guizhou[J].Chinese Journal of Engineering Geophysics,2013,10(6):771~776.(in Chinese)
[19]孔繁良,陈超,孙冠军.高密度电法在清江水布垭库区滑坡调查中的应用[J].工程地球物理学报,2008,5(2):201~204.Kong Fanliang,Chen Chao,Sun Guanjun.Application of multi-electrical method to landslide investigation in Qingjiang Shuibuya Reservor[J].Chinese Journal of Engineering Geophysics,2008,5(2):201~204.(in Chinese)
[20]程志平.电法勘探教程[M].北京:冶金工业出版社,2007:1~3.Cheng Zhiping.Principle and method of electrical prospecting[M].Beijing:Metallurgical Industry Press,2007:1~3.(in Chinese)
[21]蔡晶晶,阎长虹,王宁等.高密度电法在地铁岩溶勘察中的应用[J].工程地质学报,2011,19(6):935~940.Cai Jingjing,Yan Changhong,Wang Ning et al.Application of high density resistivity method to karst investigation of metroengineering[J].Journal of Engineering Geology,2011,19(6):935~940.(in Chinese)
[22]郑冰,李柳德.高密度电法不同装置的探测效果对比[J].工程地球物理学报,2015,12(1):33~39.Zheng Bing,Li Liude.The exploration effective comparison of different settings in resistivity tomography[J].Chinese Journal of Engineering Geophysics,2015,12(1):33~39.(in Chinese)
[23]柳建新,曹创华,郭荣文等.不同装置下的高密度电法测深试验研究[J].工程勘察,2013,41(4):85~89.Liu Jianxin,Cao Chuanghua,Guo Rongwen et al.Experimental study on the sounding with high density resistivity method by using different devices[J].Geotechnical Investigation&Surveying,2013,41(4):85~89.(in Chinese)