CAJ | 학술논문

针对西南地区岩溶隧道的实际工程,开展了隐伏岩溶群对公路隧道顶板承载力影响的三维数值敏感性分析研究.经对岩溶顶板稳定性影响因素分析,选择溶洞顶板厚度、顶板岩体的工程地质特性(定量指标为岩体的力学参数)、溶洞的宽度、溶洞高度、上覆土层厚度为影响溶洞顶板稳定性的五个主要影响因素作为影响因子,进行正交敏感性数值试验.根据影响因素敏感度的正交三维有限元法分析结果得出,影响顶板承载力和项板中心下沉位移大小顺序依次为:岩体力学参数、顶板岩层厚度、覆盖土层厚度、溶洞宽度、溶洞高度.
침대서남지구암용수도적실제공정,개전료은복암용군대공로수도정판승재력영향적삼유수치민감성분석연구.경대암용정판은정성영향인소분석,선택용동정판후도、정판암체적공정지질특성(정량지표위암체적역학삼수)、용동적관도、용동고도、상복토층후도위영향용동정판은정성적오개주요영향인소작위영향인자,진행정교민감성수치시험.근거영향인소민감도적정교삼유유한원법분석결과득출,영향정판승재력화항판중심하침위이대소순서의차위:암체역학삼수、정판암층후도、복개토층후도、용동관도、용동고도.
Based on a tunnel real engineering of southwest region,a three dimensional numerical analysis concerning the sensitivity influence of the concealed karst caverns on the bearing capacity of the top plate of the highway tunnel was carried out.Through the stability analysis of influence factors on top plate of tunnel,five main influence factors on the stability of top plate,including the thickness of top plate,the geological properties of roof rock mass (the quantitative indexes are the mechanical parameters of rock mass),the width of karst caverns,the height of karst caverns and the thickness of overlay rock mass,were selected for orthogonal sensitivity numerical analysis.The result of FEM orthogonal sensitivity numerical experiment indicates that the degree sequence of the influence factors on the bearing capacity and subsidence displacement of the top plate is the properties of rock mass.the thickness of top plate,the thickness of overlay rock mass,the width of karst caverns and the height of karst caverns.