【摘要】 依据监测位移,基于突变理论,提出快速、简便评判围岩稳定的新方法和量化标准。建立非线性动力–尖点突变模型,根据突变的失稳判据(突变特征值D≤0),计算出突变位移速率;依据稳定判据(突变特征值D>0)确定稳定位移速率,并计算位移速率比值。根据该方法,提出主厂房(或主变室)评判量化标准:稳定位移速率为0.4mm/d(或0.2mm/d),突变位移速率为9.0mm/d(或2.5mm/d),位移速率比值为18%(或14%)。并将此方法应用于大型工程围岩稳定性评判,验证评判方法和量化标准的合理性和有效性,可为同类工程提供参考。更多还原

【Abstract】 Based on monitoring displacement and catastrophe theory,a new rapid and simply quantitative criterion is proposed to assess the stability of surrounding rock. The nonlinear dynamic-cusp catastrophe model is established. According to the instability catastrophe criterion(catastrophe feature value D≤0),catastrophe displacement rate is calculated. The stable displacement rate is determined and the ratio of displacement rate is calculated by using stability criterion(D>0). According to the method,the judgment quantitative criterion for main power house (or main-transformed cavern) is put forward,which is that the stability displacement rate, catastrophe displacement rate and the ratio of displacement rate are 0.4(or 0.2) mm/d,9.0(or 2.5) mm/d and 18%(or 14%),respectively. The judgment quantitative criterion is applied to assess the surrounding rock stability of large-scale project. The rationality and effectiveness of the judgment method and quantitative criterion are validated,which can provide reference for the similar project.更多还原