四川省理县—小金公路岩质边坡监测试验研究
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摘要
根据在四川省理县—小金路震区边坡开展的边坡现场监测试验,并结合监测期间区域范围内发生的三次4.8级以上地震,表明:表面岩体结构面总体出现了一个变形量迅速增大的过程,其施工对震区岩质边坡坡面产生的松散变形影响依然是最大的,施工后坡面在经历2个月的变形衰减后,基本趋于稳定;对于该处边坡的反向结构面,地震还将对坡表岩体结构产生一个挤密的变形作用,这有利于坡表岩层的稳定性;水平位移变化频繁,与该处位置及其荷载、地震激发等因素相关。在该处下边坡设立挡土墙是十分必要的,其后期的观测数据表明该处已基本恢复稳定。
In-situ monitoring experiment was carried out in combination with the slope of the Lixian-Xiaojin Highway in Sichuan province seismic area.In the period of monitoring,three earthquakes whose magnitudes were more than 4.8 grades occurred in this area.Based on the monitoring results,the main conclusions are as followed.The deformation of overall of the surface rock structure has a process of rapid increase,which indicates that the construction still produces the largest affect on the loose deformation of rock slope in this seismic area.The deformation had attenuated for about 2 months,and then tend to be stable.For reverse structural surface,the rock structure of slope surface would also produce compacted deformation by earthquake,which was conducive to the stability of rock slope.The change in horizontal displacement was frequent,which was related to its location,load and seismic excitation.It is necessary to set up retaining walls under the slope.Moreover,the latter observation data indicates that the slope has been basically stabilized.
In-situ monitoring experiment was carried out in combination with the slope of the Lixian-Xiaojin Highway in Sichuan province seismic area.In the period of monitoring,three earthquakes whose magnitudes were more than 4.8 grades occurred in this area.Based on the monitoring results,the main conclusions are as followed.The deformation of overall of the surface rock structure has a process of rapid increase,which indicates that the construction still produces the largest affect on the loose deformation of rock slope in this seismic area.The deformation had attenuated for about 2 months,and then tend to be stable.For reverse structural surface,the rock structure of slope surface would also produce compacted deformation by earthquake,which was conducive to the stability of rock slope.The change in horizontal displacement was frequent,which was related to its location,load and seismic excitation.It is necessary to set up retaining walls under the slope.Moreover,the latter observation data indicates that the slope has been basically stabilized.
引文
[1]Siad L.Seismic stability analysis of fractured rockslopes by yield design theory[J].Soil Dynamics andEarthquake Engineering,2003(23):203-212.
[2]苏永华,赵明华,李志勇,等.基于虚拟试验的边坡失稳概率分析方法[J].中国公路学报,2008,21(6):14-19.[SU Y H,ZHAO M H,LI Z Y,et al.Instability probability analysis method of slope basedon dummy test[J].China Journal of Highway andTransport,2008,21(6):14-19.(in Chinese)]
[3]刘汉龙,费康,高玉峰.边坡地震稳定性时程分析方法[J].岩土力学,2003,24(4):553-556.[LIUH L,FEI K,GAO Y F.Time history analysis methodof slope seismic stability[J].Rock and SoilMechanics,2003,24(4):553-556.(inChinese)]
[4]吴兆营,薄景山,刘红帅,等.岩体边坡地震稳定性动安全系数分析方法[J].防灾减灾工程学报,2004,24(3):237-241.[WU Z Y,BO J S,LIU HS,et al.A method for evaluating dynamic safetyfactor rock slope seismic stability analysis[J].Journalof Disaster Pnevention and Mitigation Engineering,2004,24(3):237-241.(in Chinese)]
[5]宋胜武.汶川大地震工程震害调查分析与研究[M].北京:科学出版社,2009:24-87.[SONG SW.Investigation and research for engineering seismicdamage in Wenchuan-earthquake[M].Beijing:Science Press,2009:24-87.(in Chinese)]
[6]李勇,周荣军,董顺利,等.汶川特大地震的地表破裂与逆冲—走滑作用[J].成都理工大学学报:自然科学版,2008,35(4):404-413.[LI Y,ZHOUR J,DONG S L,et al.Ground surface ruptures andthrust in Wenchuan-earthquake:strike-slipping action[J].Journal of Chengdu University of Technology:Science&Technology Edition,2008,35(4):404-413.(in Chinese)]
[7]ZHOU Zhong,WANG Hong-gui,FU He-lin,et al.Influences of rainfall infiltration on stability ofaccumulation slope by in-situ monitoring test[J].Journal of Central South University of Technology,第1期水文地质工程地质.131.2009,16(2):297-302.
[8]宰金珉.岩土工程测试与监测技术[M].北京:中国建筑工业出版社,2008:76-92.[ZAI J M.Testing and monitoring technology for geotechnicalengineering[M].Beijing:China Building IndustryPress,2008:76-92.(in Chinese)]
[2]苏永华,赵明华,李志勇,等.基于虚拟试验的边坡失稳概率分析方法[J].中国公路学报,2008,21(6):14-19.[SU Y H,ZHAO M H,LI Z Y,et al.Instability probability analysis method of slope basedon dummy test[J].China Journal of Highway andTransport,2008,21(6):14-19.(in Chinese)]
[3]刘汉龙,费康,高玉峰.边坡地震稳定性时程分析方法[J].岩土力学,2003,24(4):553-556.[LIUH L,FEI K,GAO Y F.Time history analysis methodof slope seismic stability[J].Rock and SoilMechanics,2003,24(4):553-556.(inChinese)]
[4]吴兆营,薄景山,刘红帅,等.岩体边坡地震稳定性动安全系数分析方法[J].防灾减灾工程学报,2004,24(3):237-241.[WU Z Y,BO J S,LIU HS,et al.A method for evaluating dynamic safetyfactor rock slope seismic stability analysis[J].Journalof Disaster Pnevention and Mitigation Engineering,2004,24(3):237-241.(in Chinese)]
[5]宋胜武.汶川大地震工程震害调查分析与研究[M].北京:科学出版社,2009:24-87.[SONG SW.Investigation and research for engineering seismicdamage in Wenchuan-earthquake[M].Beijing:Science Press,2009:24-87.(in Chinese)]
[6]李勇,周荣军,董顺利,等.汶川特大地震的地表破裂与逆冲—走滑作用[J].成都理工大学学报:自然科学版,2008,35(4):404-413.[LI Y,ZHOUR J,DONG S L,et al.Ground surface ruptures andthrust in Wenchuan-earthquake:strike-slipping action[J].Journal of Chengdu University of Technology:Science&Technology Edition,2008,35(4):404-413.(in Chinese)]
[7]ZHOU Zhong,WANG Hong-gui,FU He-lin,et al.Influences of rainfall infiltration on stability ofaccumulation slope by in-situ monitoring test[J].Journal of Central South University of Technology,第1期水文地质工程地质.131.2009,16(2):297-302.
[8]宰金珉.岩土工程测试与监测技术[M].北京:中国建筑工业出版社,2008:76-92.[ZAI J M.Testing and monitoring technology for geotechnicalengineering[M].Beijing:China Building IndustryPress,2008:76-92.(in Chinese)]
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