模糊综合评判法分析地震滑坡启程能量转换
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摘要
地震滑坡启程能量转化分析对于后期滑坡动力学研究极为重要,因其影响因素较多,具有模糊性,目前还没有准确的定量计算公式。模糊综合评判法分析模糊问题具有明显的优势,能够综合考虑各种因素给出总体评价。选取地震加速度、岩体结构类型、控制性结构面特征、岩体完整程度、地层岩性、地下水、不利结构面与临空面的夹角7个因素作为地震滑坡启程剧动能量转换大小划分的主要因素,详细分析各个因素对能量转化的影响。采用逻辑分区法确定隶属函数,应用模糊层次分析法(FAHP)确定各因素的权重。在此基础上,运用模糊数学综合评判方法得出能量转化率等级,半定量地确定能量转化率大小。以东河口地震滑坡为例,应用模糊综合评判法对其启程能量转换分析结果客观合理,表明该方法是科学可行的,在同类理论研究中可以借鉴。
The analysis of energy conversion during the set-out process of seismic landslide is very important for the late landslide kinetic theoretical studies.Because the analysis impacted by many complex influencing factors is fuzzy,there is no accurate quantitative calculation formula for energy conversion rate.Fortunately,the fuzzy synthetic evaluation method has obvious advantage in the analysis of fuzzy problems,which can take various complex factors into account to make an overall assessment.Therefore,the method can be adopted to determine the grade of energy conversion rate.After analyzing the effect of every factor on the energy conversion rate in detail,seven factors,such as seismic acceleration,structure of rock mass,characteristics of controlling structural planes,integrity of rock mass,stratum lithology,groundwater,and angle between the unfavourable interfaces and free surface,are selected as the major factors.Using fuzzy analytic hierarchy process,the important degree of the above factors characterized by the influencing weight is obtained.And the logic classification method is adopted to determine the membership function.On this basis,the fuzzy synthetic evaluation is then used to draw the grade of energy conversion rate with its value determined semi-quantitatively.The proposed method is applied to study the Donghekou earthquake-induced landslide;and the obtained results meet the objective reality,so as to indicate that the method is scientific and feasible.Consequently,it can be used for reference in other similar theoretical researches.
The analysis of energy conversion during the set-out process of seismic landslide is very important for the late landslide kinetic theoretical studies.Because the analysis impacted by many complex influencing factors is fuzzy,there is no accurate quantitative calculation formula for energy conversion rate.Fortunately,the fuzzy synthetic evaluation method has obvious advantage in the analysis of fuzzy problems,which can take various complex factors into account to make an overall assessment.Therefore,the method can be adopted to determine the grade of energy conversion rate.After analyzing the effect of every factor on the energy conversion rate in detail,seven factors,such as seismic acceleration,structure of rock mass,characteristics of controlling structural planes,integrity of rock mass,stratum lithology,groundwater,and angle between the unfavourable interfaces and free surface,are selected as the major factors.Using fuzzy analytic hierarchy process,the important degree of the above factors characterized by the influencing weight is obtained.And the logic classification method is adopted to determine the membership function.On this basis,the fuzzy synthetic evaluation is then used to draw the grade of energy conversion rate with its value determined semi-quantitatively.The proposed method is applied to study the Donghekou earthquake-induced landslide;and the obtained results meet the objective reality,so as to indicate that the method is scientific and feasible.Consequently,it can be used for reference in other similar theoretical researches.
引文
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[5]祁生文,伍法权,刘春玲,等.地震边坡稳定性的工程地质分析[J].岩石力学与工程学报,2004,23(16):2792-2796.QI Shen-wen,WU Fa-quan,LIU Chun-ling,et al.Engineering geology analysis of stability of slope underearthquake[J].Chinese Journal of Rock Mechanics andEngineering,2004,23(16):2792-2796.
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[8]汪培庄,李洪兴.模糊系统理论与模糊计算机[M].北京:科学出版社,1996:92-129.
[9]邱向荣.岩溶塌陷稳定性的灰色模糊综合评判[J].水文地质工程地质,2004,47(4):58-61.QIU Xiang-rong.Grey fuzzy synthetic assessment forstability of karst collapse[J].Hydrogeology andEngineering Geology,2004,47(4):58-61.
[10]唐建新,徐宁霞,康钦容.模糊综合评判在矿山地质环境中的应用[J].重庆大学学报,2010,33(5):145-150.TANG Jian-xin,XU Ning-xia,KANG Qin-rong.Theapplication of fuzzy comprehensive evaluation based onAHP to forecast and dangerous assessment of geologichazards along highway[J].Journal of ChongqingUniversity,2010,33(5):145-150.
[11]鲁道洪.基于AHP的模糊综合评判在公路地质灾害的危险性评价[J].四川地质学报,2009,29(3):357-360.LU Dao-hong.The application of fuzzy comprehensiveevaluation based on AHP to forecast and dangerousassessment of geologic hazards along highway[J].ActaGeologica Sichuan,2009,29(3):357-360.
[12]孟衡.模糊数学在岩质边坡稳定性分析中的应用[J].岩土工程技术,2008,22(4):178-181.MENG Heng.Application of fuzzy mathematics to rockslope stability analysis[J].Geotechnical EngineeringTechnique,2008,22(4):178-181.
[13]王新民,赵彬,张钦礼.基于层次分析和模糊数学的采矿方法选择[J].中南大学学报(自然科学版),2008,39(5):875-879.WANG Xin-min,ZHAO Bin,ZHANG Qin-li.Miningmethod choice based on AHP and fuzzy mathematics[J].Journal of Central South University(Science andTechnology),2008,39(5):875-879.
[14]丁月双.东河口滑坡成因机理与运动特征研究[R].成都:成都理工大学,2009.
[15]许强,裴向军,黄润秋,等.汶川地震大型滑坡研究[M].北京:科学出版社,2009.
[16]程谦恭,胡厚田,胡广韬,等.高速岩质滑坡临床弹冲与峰残强降复合启程加速动力学机理[J].岩石力学与工程学报,2000,19(2):173-176.CHENG Qian-gong,HU Hou-tian,HU Guang-tao,et al.A study of complex acceleration dynamics mechanism ofhigh-speed landslide by elastic rocky impulse andpeak-residual strength drop[J].Chinese Journal of RockMechanics and Engineering,2000,19(2):173-176.
[2]殷跃平.汶川地震地质与滑坡灾害概论[M].北京:地质出版社,2009.
[3]毛彦龙,胡广韬,赵法锁,等.地震动触发滑坡体滑动的机理[J].西安工程学院学报,1998,20(4):45-49.MAO Yan-long,HU Guang-tao,ZHAO Fa-suo,et al.Mechanics of the landslide sliding caused byearthquake[J].Journal of Xi’an Engineering University,1998,20(4):45-49.
[4]王来贵,章梦涛,王泳嘉,等.基岩振动干扰下的动力滑坡机制研究[J].工程地质学报,1997,5(2):137-142.WANG Lai-gui,ZHANG Meng-tao,WANG Yong-jia,et al.The study of mechanism for dynamic slope-slippingby vibration in base rock[J].Journal of EngineeringGeology,1997,5(2):137-142.
[5]祁生文,伍法权,刘春玲,等.地震边坡稳定性的工程地质分析[J].岩石力学与工程学报,2004,23(16):2792-2796.QI Shen-wen,WU Fa-quan,LIU Chun-ling,et al.Engineering geology analysis of stability of slope underearthquake[J].Chinese Journal of Rock Mechanics andEngineering,2004,23(16):2792-2796.
[6]毛彦龙,胡广韬,毛新虎,等.地震滑坡启程剧动的机理研究及离散元模拟[J].工程地质学报,2001,9(1):74-80.MAO Yan-long,Hu Guang-tao,MAO Xin-hu,et al.Mechanism of set-out violent slide of slope mass duringearthquake and its simulation by using discrete elementmethod[J].Journal of Engineering Geology,2001,9(1):74-80.
[7]苏永华,何满潮,孙晓明.岩体模糊分类中隶属函数的等效性[J].北京科技大学学报,2007,29(7):670-675.SU Yong-hua,HE Man-chao,SUN Xiao-ming.Equivalent chara-cteristic of membership function type inrock mass fuzzy classification[J].Journal of Universityof Science and Technology Beijing,2007,29(7):670-675.
[8]汪培庄,李洪兴.模糊系统理论与模糊计算机[M].北京:科学出版社,1996:92-129.
[9]邱向荣.岩溶塌陷稳定性的灰色模糊综合评判[J].水文地质工程地质,2004,47(4):58-61.QIU Xiang-rong.Grey fuzzy synthetic assessment forstability of karst collapse[J].Hydrogeology andEngineering Geology,2004,47(4):58-61.
[10]唐建新,徐宁霞,康钦容.模糊综合评判在矿山地质环境中的应用[J].重庆大学学报,2010,33(5):145-150.TANG Jian-xin,XU Ning-xia,KANG Qin-rong.Theapplication of fuzzy comprehensive evaluation based onAHP to forecast and dangerous assessment of geologichazards along highway[J].Journal of ChongqingUniversity,2010,33(5):145-150.
[11]鲁道洪.基于AHP的模糊综合评判在公路地质灾害的危险性评价[J].四川地质学报,2009,29(3):357-360.LU Dao-hong.The application of fuzzy comprehensiveevaluation based on AHP to forecast and dangerousassessment of geologic hazards along highway[J].ActaGeologica Sichuan,2009,29(3):357-360.
[12]孟衡.模糊数学在岩质边坡稳定性分析中的应用[J].岩土工程技术,2008,22(4):178-181.MENG Heng.Application of fuzzy mathematics to rockslope stability analysis[J].Geotechnical EngineeringTechnique,2008,22(4):178-181.
[13]王新民,赵彬,张钦礼.基于层次分析和模糊数学的采矿方法选择[J].中南大学学报(自然科学版),2008,39(5):875-879.WANG Xin-min,ZHAO Bin,ZHANG Qin-li.Miningmethod choice based on AHP and fuzzy mathematics[J].Journal of Central South University(Science andTechnology),2008,39(5):875-879.
[14]丁月双.东河口滑坡成因机理与运动特征研究[R].成都:成都理工大学,2009.
[15]许强,裴向军,黄润秋,等.汶川地震大型滑坡研究[M].北京:科学出版社,2009.
[16]程谦恭,胡厚田,胡广韬,等.高速岩质滑坡临床弹冲与峰残强降复合启程加速动力学机理[J].岩石力学与工程学报,2000,19(2):173-176.CHENG Qian-gong,HU Hou-tian,HU Guang-tao,et al.A study of complex acceleration dynamics mechanism ofhigh-speed landslide by elastic rocky impulse andpeak-residual strength drop[J].Chinese Journal of RockMechanics and Engineering,2000,19(2):173-176.
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