摘要
通过对考虑隧道围岩蠕变特性的初衬变形的理论公式的分析,利用现场实测数据的拟合公式,确定了围岩的流变参数。结合规范对于隧道二衬支护时间的确定准则,确定各级别围岩中隧道二次衬砌支护的合理时机,并利用已知的流变参数进一步求得不同初衬厚度、开挖跨度时的二衬合理支护时机。给出的流变参数和二衬合理支护时机,可为类似工程参考。
Tunnel deformation on the basis ofrheological theory is discussed, followed by an exponential fitting of the field monitoring data. Three rheological parameters are then given. Using these three parameters, the appropriate supporting time of second lining is proposed according to the national specifications. Further more, the time of secondary lining in tunnels with different primary lining thicknesses as well as different excavation spans are given using these parameters.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2010年第A01期3241-3246,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
广东省交通厅技术攻关项目(2007A16)
关键词
隧道工程
二次衬砌
支护时机
蠕变
隧道变形
tunnelling engineering secondary lining supporting time
creep
tunnel deformation
