Slope Stability Calculation and Support Design Considering Three-Dimensional Constraint Effects
There are three faults in the entrance slope of the tunnel spillway of Shuangjiangkou Hydropower Station.After the excavation of the slope,the fault cuts to form a large-scale potential unstable wedge,and the safety risk during the construction period and the operation period is large.The three-dimensional effect of the slope is significant,and it is difficult to select representative sections for two-dimensional stability calculation analysis and treatment.The three-dimensional distinct element method is used to calculate,analyze and evaluate the stress deformation and stability of the slope.On the basis of considering the three-dimensional constraint effects,the targeted three-dimensional space anchoring measures are adopted for the slope according to the calculation results.The anchor cables are reasonably arranged in consideration of fault locking and block reinforcement,and the principle of redundancy design and anhydrous operation is followed to ensure the stability of the excavation slope during construction and operation.The design experience can be used for reference by similar projects.
slope stabilitythree-dimensional constraint effectswedge bodydistinct element methodthree-dimensional space anchoring
万方数据
维普
