河北省宽城县某滑坡特征与稳定性评价
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摘要
位于河北省宽城县某拟建铁路将穿越一老滑坡体,体积约77×104 m3,并在滑坡前缘以路堑方式穿过,因开挖施工导致老滑坡复活。在现场地质调查基础上,阐明了滑坡所在的地质环境条件和发育特征,系统分析了老滑坡的形成原因和复活机理,即老滑坡是受附近断层影响,岩体完整性较差,而前缘河流冲刷和回漩旁蚀降低了边坡的整体稳定性,在暴雨或地震诱发下形成,而修建铁路的路堑开挖则是导致前缘抗滑段失效而复活的主要原因。在现场试验和室内试验成果基础上,分别对沿现滑面和古滑面在不同工况下的稳定性进行计算,并系统分析了铁路路堑边坡开挖对滑坡稳定性的影响程度,并对滑坡治理提出了措施建议。
In Kuancheng county of Hebei province,a railway to be built will cut across an ancient landslide of about 770 000 cubic meters,and in front of it in cutting way though.Excavation of the cutting slope leads to the ancient landslide revivification.Based on geological survey in the field,this paper expounded the geological environmental conditions and developmental characteristics,analyzed the forming reason and revival mechanism systematically,i.e.: Influence of faults nearby damaged the rock mass integrity,the scour and lateral erosion by the front river reduced the slope stability,and the landslide occurred with rainstorm or earthquake.Cutting slope excavation of the railway is the main cause of anti-sliding section invalidation and the ancient landslide revivification.On the basis of results of field test and laboratory experiment,calculated the landslide stability respectively along the existing and the ancient sliding surface with different working conditions.And analyzed the influence degree of slope excavation to the landslide stability systematically.Finally reasonable treatment measures were put forward for the landslide.
In Kuancheng county of Hebei province,a railway to be built will cut across an ancient landslide of about 770 000 cubic meters,and in front of it in cutting way though.Excavation of the cutting slope leads to the ancient landslide revivification.Based on geological survey in the field,this paper expounded the geological environmental conditions and developmental characteristics,analyzed the forming reason and revival mechanism systematically,i.e.: Influence of faults nearby damaged the rock mass integrity,the scour and lateral erosion by the front river reduced the slope stability,and the landslide occurred with rainstorm or earthquake.Cutting slope excavation of the railway is the main cause of anti-sliding section invalidation and the ancient landslide revivification.On the basis of results of field test and laboratory experiment,calculated the landslide stability respectively along the existing and the ancient sliding surface with different working conditions.And analyzed the influence degree of slope excavation to the landslide stability systematically.Finally reasonable treatment measures were put forward for the landslide.
引文
[1]Chen Song,Xu Guangli.Research on engineering geology character-istics of soil in sliding zone of Huangtupo landslide in Three GorgesReservoir area[J].Rock and Soil Mecha-nics,2009,30(10):3048-3052[陈松,徐光黎.三峡库区黄土坡滑坡滑带工程地质特征研究[J].岩土力学,2009,30(10):3048-3052]
[2]Zhou Fuhua,Luo Shiyi,Sun Jichao.The formation mechanism andcomprehensive engineering treatment of cutting slope land-slide atK18 section of expressway around Nanning[J].Journal of Highwayand Trans-portation Research and Development,2007,24(7):44-51[周富华,罗世毅,孙即超.南宁环城高速公路K18路堑滑坡形成机制与综合处治对策[J].公路交通科技,2007,24(7):44-51]
[3]Hu Ruilin,Wang Shanshan.Main features and identification methodof sliding-surface in soil and rock slopes[J].Journal of EngineeringGeology,2010,18(1):35-40[胡瑞林,王珊珊.滑坡滑面(带)的辩识[J].工程地质学报,2010,18(1):35-40]
[4]Li Shouding.Study on Ji'an landslide charcters and origin inWanzhou Chongqin[J].Chinese Journal of Rock Mechanics andEngineering,2005,24(17):3159-3164[李守定.重庆万州吉安滑坡特征与成因研究[J].岩石力学与工程学报,2005,24(17):3159-3164]
[5]Sun Hongyue.Formation mechanism and control measures of thepebbly clay landslide[D].Hangzhou:Zhejiang University,2005[孙红月.含碎石粘性土滑坡的成因机理与防治对策[D].杭州:浙江大学2,005]
[6]Liu Chuanzheng,A new discussion about genesis and failure mecha-nism of Badu Land-slides in Nanning-Kunming railway[J].Hydrogeology&Engineering Geology,2007(5):1-5[刘传正.南昆铁路八渡滑坡成因机理新认识[J].水文地质工程地质,2007(5):1-5]
[7]Fu Helin,Li Changyou,Guo Fenge,t al.Situ-test of abduction ele-ments of landslide and its influence[J].Journal of Central SouthUni-versity:Science and Technology,2009,40(3):781-785[傅鹤林,李昌友,郭峰,等.滑坡触发因素及其影响的原位试验[J].中南大学学报:自然科学版2,009,40(3):781-785]
[8]Xie Feihong,Wang Jinshan,Yin Boyue.Landslide analysis andtreatment in the area of Chengdu-Nanning expressway[J].Chi-nese Journal of Rock Mechanics and Engi-neering,2005,24(S2):5795-5798[谢飞鸿,王锦山,尹伯悦.成南高速公路滑坡稳定性分析及治理[J].岩石力学与工程学报,2005,24(S2):5795-5798]
[9]Specification of geological investigation for landslide stabilization[S].DZ/T0218-2006[滑坡防治工程勘查规范[S].DZ/T0218-2006]
[10]Code for investigation of geotechnical engi-neering[S].GB50021-2001.[岩土工程勘察规范[S].GB50021-2001]
[11]Code for unfavorable geological condition of railway engineering[S].TB 10027-2001[铁路工程不良地质勘察规范[S].TB10027-2001]
[2]Zhou Fuhua,Luo Shiyi,Sun Jichao.The formation mechanism andcomprehensive engineering treatment of cutting slope land-slide atK18 section of expressway around Nanning[J].Journal of Highwayand Trans-portation Research and Development,2007,24(7):44-51[周富华,罗世毅,孙即超.南宁环城高速公路K18路堑滑坡形成机制与综合处治对策[J].公路交通科技,2007,24(7):44-51]
[3]Hu Ruilin,Wang Shanshan.Main features and identification methodof sliding-surface in soil and rock slopes[J].Journal of EngineeringGeology,2010,18(1):35-40[胡瑞林,王珊珊.滑坡滑面(带)的辩识[J].工程地质学报,2010,18(1):35-40]
[4]Li Shouding.Study on Ji'an landslide charcters and origin inWanzhou Chongqin[J].Chinese Journal of Rock Mechanics andEngineering,2005,24(17):3159-3164[李守定.重庆万州吉安滑坡特征与成因研究[J].岩石力学与工程学报,2005,24(17):3159-3164]
[5]Sun Hongyue.Formation mechanism and control measures of thepebbly clay landslide[D].Hangzhou:Zhejiang University,2005[孙红月.含碎石粘性土滑坡的成因机理与防治对策[D].杭州:浙江大学2,005]
[6]Liu Chuanzheng,A new discussion about genesis and failure mecha-nism of Badu Land-slides in Nanning-Kunming railway[J].Hydrogeology&Engineering Geology,2007(5):1-5[刘传正.南昆铁路八渡滑坡成因机理新认识[J].水文地质工程地质,2007(5):1-5]
[7]Fu Helin,Li Changyou,Guo Fenge,t al.Situ-test of abduction ele-ments of landslide and its influence[J].Journal of Central SouthUni-versity:Science and Technology,2009,40(3):781-785[傅鹤林,李昌友,郭峰,等.滑坡触发因素及其影响的原位试验[J].中南大学学报:自然科学版2,009,40(3):781-785]
[8]Xie Feihong,Wang Jinshan,Yin Boyue.Landslide analysis andtreatment in the area of Chengdu-Nanning expressway[J].Chi-nese Journal of Rock Mechanics and Engi-neering,2005,24(S2):5795-5798[谢飞鸿,王锦山,尹伯悦.成南高速公路滑坡稳定性分析及治理[J].岩石力学与工程学报,2005,24(S2):5795-5798]
[9]Specification of geological investigation for landslide stabilization[S].DZ/T0218-2006[滑坡防治工程勘查规范[S].DZ/T0218-2006]
[10]Code for investigation of geotechnical engi-neering[S].GB50021-2001.[岩土工程勘察规范[S].GB50021-2001]
[11]Code for unfavorable geological condition of railway engineering[S].TB 10027-2001[铁路工程不良地质勘察规范[S].TB10027-2001]
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