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。
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（D0）. 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.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2010年第A02期3812-3819,共8页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(90715042)
国家杰出青年科学基金项目(50725931)
"十一五"国家科技支撑计划项目(2008BAB29B01)
关键词
隧道工程
地下洞室
突变理论
非线性动力学模型
监测位移
tunnelling engineering
underground cavern
catastrophe theory
nonlinear dynamic model
monitoring displacement
