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依据随机加权法,实现了岩体单元模型中每个单元体的力学参数非均质化。以含结构面的非均质化岩体单元为研究对象,通过对结构面倾角、结构面长度(迹长)、结构面宽度、结构面端部间距和岩桥倾角等五个参数进行分析,并进行正交试验,拟合得出静载作用下结构面岩体的岩桥贯通系数公式,修正了现有的贯通系数。利用自主开发的岩体工程结构与模型分析系统(GeoSMA-3D),结合上述理论,对某隧道进行关键块体的空间位置搜索及工程稳定性分析。
According to the random weighting method, the heterogeneity of mechanical parameters of each unit body in the rock mass unit model is realized. Taking heterogeneous rock mass units containing structural planes as the research object, five parameters of structural plane inclination, structural plane length (trace length), structural plane width, structural plane end spacing and rock bridge inclination are analyzed. The orthogonal experiment was carried out to get the formula of rock-through coefficient of rock mass under the action of static load, and the existing penetration coefficient was corrected. Based on GeoSMA-3D, a self-developed rock mass engineering structure and model analysis system, the spatial location of key blocks and engineering stability analysis of a tunnel are analyzed.