安县晓坝镇震后新建场址主要岩土工程问题及对策
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摘要
安县晓坝镇处于"5.12"汶川大地震极重灾区,受灾严重,不具备重建条件,需选址重建。在野外详细调查的基础上,通过现场勘查和室内试验,深入研究了晓坝镇灾后新建场址的主要岩土工程问题。研究表明,新建场址主要土层为粉质粘土和淤泥质土,属高压缩性软弱土;地下水埋深浅,对基础施工和地基土承载力影响大;建筑场地类别Ⅱ类,属抗震不利地段。提出了深层水泥土搅拌法和换填地基两种软基处理方案,以及加强地基基础抗震设计等措施。
Xiaoba Town of Anxian County,almost totally destroyed in the Wenchuan earthquake,did not have the reconstruction conditions and need to site redevelop.In order to study reconstruction-related geotechnical problems in heavy quake-hit areas,taking Xiaoba town as an example,we studied the main geotechnical problems of its new site based on detailed field survey and laboratory test.The results show that the main reconstruction-related geotechnical problems of this site are as follows: bad physical and mechanical properties of ground soils;shallow groundwater level;and unfavorable seismic site.Focusing on those problems,we present two methods,namely deep mixing method and replacement of ground soil method,to treat the soft ground,and suggest strengthening seismic design of subsoil-foundation.
Xiaoba Town of Anxian County,almost totally destroyed in the Wenchuan earthquake,did not have the reconstruction conditions and need to site redevelop.In order to study reconstruction-related geotechnical problems in heavy quake-hit areas,taking Xiaoba town as an example,we studied the main geotechnical problems of its new site based on detailed field survey and laboratory test.The results show that the main reconstruction-related geotechnical problems of this site are as follows: bad physical and mechanical properties of ground soils;shallow groundwater level;and unfavorable seismic site.Focusing on those problems,we present two methods,namely deep mixing method and replacement of ground soil method,to treat the soft ground,and suggest strengthening seismic design of subsoil-foundation.
引文
[1]邓起东,陈社发,赵小麟.龙门山及其邻区的构造和地震活动及动力学[J].地震地质,1994,16(4):389~403.DENG Qi-dong,CHEN She-fa,ZHAO Xiao-lin.Tectonics,Seismicity and Dynamics of Longmenshan Mountains and Its Adja-cent Regions[J].Seismology and Geology,1994,16(4):389~403.(in Chinese)
[2]李勇,周荣军,A.L.Densmore.青藏高原东缘龙门山晚新生代走滑—逆冲作用的地貌标志[J].第四纪研究,2006,26(1):40~51.LI Yong,ZHOU Rong-jun,A.L.Densmore.Geomorphic Evidence for the Late Cenozoic Strike-slipping and Thrusting inLongmen Mountain at the Eastern Margin of the Tibetan Plateau[J].Quaternary Sciences,2006,26(1):40~51.(in Chinese)
[3]何宏林,孙昭民,王世元,等.汶川Ms8.0地震地表破裂带[J].地震地质,2008,30(2):359~362.HE Hong-lin,SUNZhao-min,WANG Shi-yuan,et al.Rupture of the Ms8.0 Wenchuan Earthquake[J].Seismology and Geol-ogy,2008,30(2):359~362.(in Chinese)
[4]李传友,叶建青,谢富仁,等.汶川M8.0地震地表破裂带北川以北段的基本特征[J].地震地质,2008,30(3):683~696.LI Chuan-you,YE Jian-qing,XIE Fu-ren,et al.Characteristics of the Surface Rupture Zone of the Ms8.0 Wenchuan Earth-quake,China along the Segment North to Beichuan[J].Seismology and Geology,2008,30(3):683~696.(in Chinese)
[5]徐锡伟,闻学泽,叶建青,等.汶川M8.0地震地表破裂带及其发震构造[J].地震地质,2008,30(3):597~629.XU Xi-wei,WEN Xue-ze,YE Jian-qing,et al.The Ms8.0 Wenchuan Earthquake Surface Ruptures and Its Seismogenic Struc-ture[J].Seismology and Geology,2008,30(3):597~629.(in Chinese)
[6]马保起,张世民,田勤俭,等.汶川8.0级地震地表破裂带[J].第四纪研究,2008,28(4):513~517.MA Bao-qi,ZHANG Shi-min,TIAN Qin-jian,et al.The Surface Rupture of Wenchuan Earthquake(Ms8.0)[J].QuaternarySciences,2008,28(4):513~517.(in Chinese)
[7]谢和平,邓建辉,台佳佳,等.汶川大地震灾害与灾区重建的岩土工程问题[J].岩石力学与工程学报,2008,27(9):1781~1791.XIE He-ping,DENG Jian-hui,TAI Jia-jia,et al.Wenchuan Large Earthquake and Post-Earthquake Reconstruction-relatedGeotechnical Problems[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(9):1781~1791.(in Chinese)
[8]崔鹏,韦方强,何思明,等.5.12汶川地震诱发的山地灾害及减灾措施[J].山地学报,2008,26(3):280~282.CUI Peng,WEI Fang-qiang,HE Si-ming,et al.Mountain Disasters Induced by the Earthquake of May12 in Wenchuan and theDisasters Mitigation[J].Journal of Mountain Science,2008,26(3):280~282.(in Chinese)
[9]李渝生,黄润秋.中国汶川特大地震损毁城镇恢复重建选址的工程地质评价[J].工程地质学报,2008,16(6):764~773.LI Yu-sheng,HUANG Run-qiu.Engineering Geological Assessments of Reconstruction Sites for Cities and Towns Destroyed byWenchuan Earthquake[J].Journal of Engineering Geology,2008,16(6):764~773.(in Chinese)
[10]冯杭建,王兰中,唐小明.青川县马鹿乡地震灾后恢复重建的地质灾害危险性评估[J].山地学报,2009,27(1):115~121.FENG Hang-jian,WANG Xiao-ming,TANG Lan-zhong.Appraise of Geology Disaster Fatalness for Rebuilding Plan of Malu ofQingchuang after 5.12 Wenchuan Earthquake[J].Journal of Mountain Science,2009,27(1):115~121.(in Chinese)
[2]李勇,周荣军,A.L.Densmore.青藏高原东缘龙门山晚新生代走滑—逆冲作用的地貌标志[J].第四纪研究,2006,26(1):40~51.LI Yong,ZHOU Rong-jun,A.L.Densmore.Geomorphic Evidence for the Late Cenozoic Strike-slipping and Thrusting inLongmen Mountain at the Eastern Margin of the Tibetan Plateau[J].Quaternary Sciences,2006,26(1):40~51.(in Chinese)
[3]何宏林,孙昭民,王世元,等.汶川Ms8.0地震地表破裂带[J].地震地质,2008,30(2):359~362.HE Hong-lin,SUNZhao-min,WANG Shi-yuan,et al.Rupture of the Ms8.0 Wenchuan Earthquake[J].Seismology and Geol-ogy,2008,30(2):359~362.(in Chinese)
[4]李传友,叶建青,谢富仁,等.汶川M8.0地震地表破裂带北川以北段的基本特征[J].地震地质,2008,30(3):683~696.LI Chuan-you,YE Jian-qing,XIE Fu-ren,et al.Characteristics of the Surface Rupture Zone of the Ms8.0 Wenchuan Earth-quake,China along the Segment North to Beichuan[J].Seismology and Geology,2008,30(3):683~696.(in Chinese)
[5]徐锡伟,闻学泽,叶建青,等.汶川M8.0地震地表破裂带及其发震构造[J].地震地质,2008,30(3):597~629.XU Xi-wei,WEN Xue-ze,YE Jian-qing,et al.The Ms8.0 Wenchuan Earthquake Surface Ruptures and Its Seismogenic Struc-ture[J].Seismology and Geology,2008,30(3):597~629.(in Chinese)
[6]马保起,张世民,田勤俭,等.汶川8.0级地震地表破裂带[J].第四纪研究,2008,28(4):513~517.MA Bao-qi,ZHANG Shi-min,TIAN Qin-jian,et al.The Surface Rupture of Wenchuan Earthquake(Ms8.0)[J].QuaternarySciences,2008,28(4):513~517.(in Chinese)
[7]谢和平,邓建辉,台佳佳,等.汶川大地震灾害与灾区重建的岩土工程问题[J].岩石力学与工程学报,2008,27(9):1781~1791.XIE He-ping,DENG Jian-hui,TAI Jia-jia,et al.Wenchuan Large Earthquake and Post-Earthquake Reconstruction-relatedGeotechnical Problems[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(9):1781~1791.(in Chinese)
[8]崔鹏,韦方强,何思明,等.5.12汶川地震诱发的山地灾害及减灾措施[J].山地学报,2008,26(3):280~282.CUI Peng,WEI Fang-qiang,HE Si-ming,et al.Mountain Disasters Induced by the Earthquake of May12 in Wenchuan and theDisasters Mitigation[J].Journal of Mountain Science,2008,26(3):280~282.(in Chinese)
[9]李渝生,黄润秋.中国汶川特大地震损毁城镇恢复重建选址的工程地质评价[J].工程地质学报,2008,16(6):764~773.LI Yu-sheng,HUANG Run-qiu.Engineering Geological Assessments of Reconstruction Sites for Cities and Towns Destroyed byWenchuan Earthquake[J].Journal of Engineering Geology,2008,16(6):764~773.(in Chinese)
[10]冯杭建,王兰中,唐小明.青川县马鹿乡地震灾后恢复重建的地质灾害危险性评估[J].山地学报,2009,27(1):115~121.FENG Hang-jian,WANG Xiao-ming,TANG Lan-zhong.Appraise of Geology Disaster Fatalness for Rebuilding Plan of Malu ofQingchuang after 5.12 Wenchuan Earthquake[J].Journal of Mountain Science,2009,27(1):115~121.(in Chinese)
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