【摘要】 通过三维有限元方法进行了溪洛渡拱坝渗流场分析,并采用增量荷载法研究考虑了渗流场通过地基变形作用于高拱坝结构的影响。结合溪洛渡工程,研究了渗流场对高拱坝地基变形的影响,包括横河向和顺河向两方面。对比蓄水前后,采用增量荷载法,研究地基变形增量对高拱坝结构应力和变形的影响及大小。研究成果初步表明渗流场是影响溪洛渡拱坝监测资料反映的径向往上游变形的影响因素之一,后续将深入研究岩石与水力学作用,分析和掌握因水库蓄水而产生的各类荷载以及岩石力学性质的变化,最终明晰高拱坝结构变形机理和真实工作状态。更多还原

【Abstract】 In this paper,deformation of high-arch dam foundation caused by seepage filed was simulated by 3D FEM. Incremental load method,a practical method was called for study of seepage filed effect on high-arch dam structure. In the light of Xiluodu dam, longitudinal and transverse foundation deformations were studied after considering seepage filed. Then with the proposed method, the distribution and magnitude of stresses and displacement caused by foundation deformation increment before and after the impoundment was simulated. Simulation result proves that seepage is one of the important reasons for phenomenon of the radial deformation of Xiluodu dam,which is upriver from the monitoring data. Future studies will focus on deformation mechanism and real the work state of high arch dam by studying water_rock interaction and changes of loads and physical-mechanical properties of rocks caused by reservoir impoundment.更多还原