CAJ | 학술논문

层状岩体的广泛分布是地下工程无法回避的现实.以渝湘高速公路共和隧道为工程背景,采用自行研制的弹脆性模型相似材料,制作出层状岩体隧道模型.采用大型真三轴岩土工程模型试验机进行加载试验,采用围岩应变监测、洞室内窥摄影、试件破坏形态的研究与分析,从而对缓倾角层理岩体中隧道的二次应力分布特征及破坏机制进行研究.试验中还通过超载系数,提供了一个安全储备的定量评估指标.试验的破坏特征与隧道实际破坏一致,说明了模型试验的正确性,同时也为顺层偏压隧道的加固机制研究及加固设计提供了试验基础.
층상암체적엄범분포시지하공정무법회피적현실.이투상고속공로공화수도위공정배경,채용자행연제적탄취성모형상사재료,제작출층상암체수도모형.채용대형진삼축암토공정모형시험궤진행가재시험,채용위암응변감측、동실내규섭영、시건파배형태적연구여분석,종이대완경각층리암체중수도적이차응력분포특정급파배궤제진행연구.시험중환통과초재계수,제공료일개안전저비적정량평고지표.시험적파배특정여수도실제파배일치,설명료모형시험적정학성,동시야위순층편압수도적가고궤제연구급가고설계제공료시험기출.
Wide contribution of layered rockmass cannot be avoided in underground construction. Based on the Gonghe tunnel in Yuxiang Highway a physical model for layered rockmass is made adopting elastobrittle simulated material which is developed independently. Loading through the large scale real triaxial geotechnical engineering testing machine, the configuration trait of secondary stress and failure mechanisms of layered rockmass tunnel with low inclination angle are presented. Various failure mechanisms present in various place via the strain in surrounding rock, inner video and failure configuration around the tunnel. The test provides a quantitative evaluating index for safety storage with overload coefficient. The failure in the test is consistent with the practical tunnel which validates the anisotropic model and provides a foundation for the research on reinforcing mechanism and reinforcing design of tunnels in layered anisotropy rockmass.