构造活动地区工程构造稳定性研究

在０．６１×１０￣５Ｒｅ６．０１×１０￣５，０．９３Ｈ／Ｄ２．５０（Ｈ为波高，Ｄ为圆柱直径）的范围内实验研究了弹性圆柱在浪流联合作用下的流体载荷。通过测量柱表面压力，得到了脉动升力和阻力系数，并给出了Ｍｏｒｉｓｏｎ公式中的Ｃ＿Ｄ，Ｃ＿Ｍ值随Ｋｃ数的变化关系，实验结果表明：在浪流联合作用下的圆柱体，其流体载荷与雷诺数的变化密切相关，并且圆柱的振动对流体载荷也有影响。

HYDRODYNAMIC FORCES ACTING ON AN ELASTIC CIRCULAR CYLINDERIN COMBINED WAVE AND CURRENT FLOW AT HIGH REYNOLDS NUMBERS

The Wuluwati Hydropower Station on Kalakashi River in Xinjiang is located in an area with recent high active tectonic movement.The field evidence shows that fault F12 at the dam site exhibited multiphase activity up to the late Pleistocene,and faulting occurred on the North Shimen fault in the neighboring area in the Quaternary.We analysed the samples of fault materials collected along the faults at dam site and its surroundings by means of analysis of microstructures,quartz surface textures and TL dating. The results indicate that the upper time limit of the last faulting is about 30 and 20ka BP along the fault F12 and North Shimen fault,respectively,while the F30 and Shimen fault exhibited actitities by the Late Pleistocene.The structural model experiments based on distribution of the regional faults and stress field predict that stress concentration segment is located in an area far from the dam site. The dam area is a relatively stable segment.