Quick estimation method on parameters of loosened zone around large underground cavern based on measured data from embedded multipoint extensometers
In construction process of large underground caverns, huge quantity computation is involved in feedback analysis of loosened zone of surrounding rock, corresponding estimate values are needed for keeping in step with excavation schedule.At first, elastic modular estimate type of surrounding rock at measure point is deduced from the classic deformation formula of circular tunnel, and an estimation method for correlation parameter is confirmed according to data reading characteristic of multipoint extensometers.Then, after excavation of top layer in main cavern, when loose zone hasnt been measured, initial test of the algorithm is carried out and its feasibility is verified.Furthermore, computation way of displacement pattern is improved.Finally, the method is applied to feedback analysis of main cavern after excavation of next layers, and it is shown that the methods computation precision meets demand of practical engineering.So that, the estimation method with brief computation and reliable estimate results, will be hopefully applied in more other large underground cavern projects in the future.
J.Zou Z.K.Li
State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering,Tsinghua U State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering,Tsinghua U
国际会议
The 3rd ISRM Young Scholars Symposium on Rock Mechanics(第三届国际岩石力学青年学者论坛)
北京
英文
45-51
2014-11-08（万方平台首次上网日期，不代表论文的发表时间）