【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。更多还原

【Abstract】 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.更多还原