广西航运枢纽工程建设中的极软岩研究
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摘要
广西郁江桂平至上游百色规划有10个千吨级航运枢纽梯级,其中老口、鱼梁、那吉处在南宁、百色第三纪盆地。盆地内泥质岩石属软~极软泥岩,它具有低强度、对环境敏感、弱改造等特性,反映在工程设计中地基承载力不足、地基应力及变形超标,抗剪强度低、抗滑稳定问题突出等方面;在工程施工中体现在岩体工程稳定性差,施工保护要求高等。根据那吉等工程勘探试验研究成果,提出针对软岩工程地质问题评价及基础验收、建基面保护、地基处理等应注意的问题和采取的对策。
About 10 navigation control junctions of kiloton-class have been planned on the Yujiang river,Guangxi province.Three junctions,Laokou,Yuliang and Naji,are located in Tertiary basins where.rocks are mainly composed of mudstone.The mudstone is saturated and has the characteristics of low compressive strength,sensitive to environment change and weakly breakage.The mudstone would cause problems in terms of low bearing capacity,excessive deformation,low factor of safety,poor rock mass stability and high requirements for design and construction.Based on the investigation of the mudstones in Naji, Laokou and Yuliang junctions,the characteristics of the mudstones are examined in this paper.Effective evaluation methods and the corresponding engineering strategies for junction construction in the mudstone are put forward.They include assessment of engineering geology conditions,measures for checking criterion for mudstone foundation,foundation mudstone protection,and foundation treatment.
About 10 navigation control junctions of kiloton-class have been planned on the Yujiang river,Guangxi province.Three junctions,Laokou,Yuliang and Naji,are located in Tertiary basins where.rocks are mainly composed of mudstone.The mudstone is saturated and has the characteristics of low compressive strength,sensitive to environment change and weakly breakage.The mudstone would cause problems in terms of low bearing capacity,excessive deformation,low factor of safety,poor rock mass stability and high requirements for design and construction.Based on the investigation of the mudstones in Naji, Laokou and Yuliang junctions,the characteristics of the mudstones are examined in this paper.Effective evaluation methods and the corresponding engineering strategies for junction construction in the mudstone are put forward.They include assessment of engineering geology conditions,measures for checking criterion for mudstone foundation,foundation mudstone protection,and foundation treatment.
引文
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[11]曲永新,张永双,杨俊峰等.中国膨胀岩、土一体化工程地质分类的理论与实践[A].中国地质学会工程地质专业委员会编.中国工程地质五十年[C].北京:地震出版社,2000,141~142.Qu Yongxin,Zhuang Yongshuang,Yang Junfeng,et al..Theoryand Practical in Engineering Geologic C lassification for ExpansiveRock and Soil in Ch ina.Ch inese Engineering Geology for 50years.Comp iled by Engineering geological comm ittee of CGS.Beijing:Ch ina Seism ic Pub lish ing House,2000,141~142.
[12]张加桂,曲永新.三峡库区泥灰质岩石溶蚀作用的微观研究[J].工程地质学报,2005,13(1):12~17.Zhang Jiagu i,Qu Yongxin.The d issolution process w ith m icro-structural variation in marlite in Three Gorges reservoir area.Journal of Engineering Geology,2005,13(1):12~17.
[13]史玉金,曾正强,严学新,陈静.上海市崇明岛浅层砂土、粉土分布探讨[J].工程地质学报,2005,13(1):34~39.Sh i Yu jin,et al..D istribution of the shallow sandy soil and siltysoil ofChongm ing island,Shanghai.Journal ofEngineering Geol-ogy,2005,13(1):34~39.
[14]殷跃平,胡瑞林.三峡库区巴东组(T2b)紫红色泥岩工程地质特征研究[J].工程地质学报,2004,12(2):124~135.Y in Yuep ing,Hu Ru ilin.Engineering geological characteristicsof purplish-red mudstone of m idd le tertiary formation at theThree-Gorges reservoir.Journal ofEngineering Geology,2004,12(2):124~135.
[2]范秋雁,凌国智等.广西第三系泥岩的物理力学特性研究[J].广西大学学报,1997,22(增刊):40~45.Fan Q iuyan,L ing Guozh i,et al..A research on the engineeringproperties of the Tertiary mudstone in Guangxi.Journal ofGuangxiUn iversity,1997,22(supple.):40~45.
[3]张信贵,黄绍铿,易念平.南宁第三系湖相沉积泥岩特性试验研究[J].广西大学学报(自然科学版),1999,24(2):93~95.Zahng X ingu i,Huang Shaokeng,Y i N ianp ing.Characteristic Ex-perim ent Research on Tertiary Lake Facies D espositedMudstone inNann ing.Journal of Guangxi Un iversity,1999,24(2):93~95.
[4]范秋雁,吴起星,周国贵.第三系泥岩桩端承载力计算机模拟研究[J].地质与勘探,2003,39(5):88~90.Fan Q iuyan,W u Q ixing,Zhou Guogu i.Computer simu lation ofloda-bearing capactiy of thrtiary mudstone p ile-tip.Geology andProspecting,2003,39(5):88~90.
[5]张信贵.南宁盆地泥岩承载力性状研究[J].岩石力学与工程学报,2000,19(3):357~360.Zhang X ingu i.Restarch on the bearing properties of mudstone inNann ing basin,Ch inese Journal of Rock M echan ics and Engineer-ing,2000,19(3):357~360.
[6]蒋忠信.百色盆地膨胀岩的特性与堑坡工程[J].铁道工程学报,1996,(2):221~230.Jiang Zhongxin.Geologic characteristics of expansive rock and cutslope engineering in Baise basin.Journal of Railway EngineeringSociety,1996,(2):221~230.
[7]冯玉勇,张永双,曲永新,黄常波.南昆铁路百色盆地膨胀上路堤病害机理研究[J].岩土工程学报,2001,23(4):463~467.Feng Yuyong,Zhang Yongshuang,Qu Yongxin.M echan ism ofembankm ent defects caused by expansive soils in Baise Basin,Nankun railway.Ch inese Jounal of Geotechn ical Engineering,2001,23(4):463~467.
[8]万宗礼,聂德新,吴曾谋.黄河上游新第三系红层工程地质特性研究[J].西北水电,2002,(2):60~63.W ang Zongli,N ieD exin,W u Zengmou.Study on engineering geologic characteristicsofNeo-Tertiary red sandstone for hydropower projects on the Up-per Yellow R iver.NorthwestW ater Power,2002,(2):60~63.
[9]何满朝.中国煤矿软岩工程地质力学研究进展[A].中国地质学会工程地质专业委员会编.中国工程地质五十年[C].北京:地震出版社,2000:109~110.He Manchao.Study progress on engineering geologic m echan ics ofsoft rock in Ch ina Coal Industry.Ch inese Engineering Geology for50 years.Comp iled by Engineering geological comm ittee of CGS.Beijing:Ch ina Seism ic Pub lish ing House,2000,109~110.
[10]陈德基主编.中国水利百科全书水利工程勘测分册[S].北京:中国水利水电出版社,2004.Chen D eji ch iefly ed ited.W ater project survey sub-volum e ofCh ina water conservancy cyclopaed ia.Beijing:Ch ina W ater andPower Pub lish ing House,2004.
[11]曲永新,张永双,杨俊峰等.中国膨胀岩、土一体化工程地质分类的理论与实践[A].中国地质学会工程地质专业委员会编.中国工程地质五十年[C].北京:地震出版社,2000,141~142.Qu Yongxin,Zhuang Yongshuang,Yang Junfeng,et al..Theoryand Practical in Engineering Geologic C lassification for ExpansiveRock and Soil in Ch ina.Ch inese Engineering Geology for 50years.Comp iled by Engineering geological comm ittee of CGS.Beijing:Ch ina Seism ic Pub lish ing House,2000,141~142.
[12]张加桂,曲永新.三峡库区泥灰质岩石溶蚀作用的微观研究[J].工程地质学报,2005,13(1):12~17.Zhang Jiagu i,Qu Yongxin.The d issolution process w ith m icro-structural variation in marlite in Three Gorges reservoir area.Journal of Engineering Geology,2005,13(1):12~17.
[13]史玉金,曾正强,严学新,陈静.上海市崇明岛浅层砂土、粉土分布探讨[J].工程地质学报,2005,13(1):34~39.Sh i Yu jin,et al..D istribution of the shallow sandy soil and siltysoil ofChongm ing island,Shanghai.Journal ofEngineering Geol-ogy,2005,13(1):34~39.
[14]殷跃平,胡瑞林.三峡库区巴东组(T2b)紫红色泥岩工程地质特征研究[J].工程地质学报,2004,12(2):124~135.Y in Yuep ing,Hu Ru ilin.Engineering geological characteristicsof purplish-red mudstone of m idd le tertiary formation at theThree-Gorges reservoir.Journal ofEngineering Geology,2004,12(2):124~135.
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