摘要
介绍在复杂地质条件下按新奥法施工的高速公路隧道的监控量测内容和方法,并采用扩张卡尔曼滤波有限元法对量测数据进行了反演分析,得到了围岩内部剪应变和塑性区的历时变化估计。计算结果表明围岩塑性区呈不对称分布,这与实测结果相符合,而更深层地揭示了围岩内部状态,为判别围岩稳定、优化施工方法提供了有益的指导。
The items and methods of monitoring for expressway tunnel constructed by NATM with complex geology are discussed. Back analysis is made by using monitored data with extended Kalman filter-FEM and the time-varying estimation of the distribution of internal shear strain and plastic zone are obtained. Result shows that the distribution of plastic zone for rock mass is asymmetrical and it is in agreement with the monitored data. The internal development state of surrounding rocks is revealed and valuable guidance is provided for optimizing construction method.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第20期3460-3464,共5页
Chinese Journal of Rock Mechanics and Engineering
