三峡工程船闸边坡的反馈分析

建立了岩石高边坡力学参数的联合位移反分析模型，该模型可以预测复杂区域材料的弹粘塑性力学参数，且可考虑施工爆破及卸荷的影响。依据反分析得出的力学参数，对三峡工程船闸边坡进行施工过程追踪预报分析，结果表明：边坡整体是稳定的，但存在局部失稳的可能性；边坡直立墙的最大变位可控制在50mm以内，风化层的最大变位可控制在80mm以内；开挖完成后最大为2．63mm的时效位移增长，发生于中隔墩直立墙的顶部，该变形在7－8个月内完成。

Feedback Analysis of the Rock Slope of Three Gorges Project Shiplock

A methodology of back analysis on the mechanical parameters of slope excavated in rock masses is illustrated, based on the combination of the elasto-viscoplastic finite element method and the complex shape minimum method. Special attention has been paid to the simulation of the variation of the parameter because of the blasting and the stress unloading relax ation. The slope excavated in the granite rock mass situated at the ship lock of the Three Gorges Project is studied. According to the mechanical parameters of the rock masses from back analysis, the deformation and stability of the rock slope are forecasted in time as going on of the slope excavation. The important conclusion has been made that the whole slope is stable but local failure can occur during the construction. The maximum displacement can be controlled within 50 mm at the top of the ship lock chamber and 80 mm at the top of slope, and the maximum residual displacement is 2.63 mm which will be completed within 7 to 8 months alter the completion of the excavation.