混凝土-堆石组合坝小型振动台模型试验研究  

Small Shaking Table Model Test Study on Concrete-rockfill Combination Dam

作　　者：王建新[1] 杨贵[2,3] 唐新军[1] 刘彦辰[2,3] 

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052 [2]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [3]河海大学安全与防灾工程研究所,江苏南京210098

出　　处：《防灾减灾工程学报》2016年第6期878-884,共7页Journal of Disaster Prevention and Mitigation Engineering

基　　金：教育部长江学者和创新团队发展计划项目(IRT1125);国家自然科学基金项目(51479059)资助

摘　　要：开展了一系列小型振动台混凝土-堆石组合坝(Concrete-rockfill Combination Dam,简称CRC坝)模型试验,利用常规图像标记法分析了组合坝下游堆石料坝坡在不同加速度峰值、频率和持时条件下的变形规律,并结合PIV(Particle Image Velocimetry)技术探讨和分析了其能否反映坝坡斜面的破坏过程。试验结果表明:CRC坝下游坝坡的堆石体颗粒的运动符合一般土石坝的振动破坏规律,CRC坝坝坡斜面的堆石体顺坡向位移随着输入加速度峰值、振动频率的增大而增大,随着振动持时的增大而相应增大、但增大到一定时刻便趋于稳定;PIV技术对于组合坝坝坡斜面内的振动破坏过程的监测是可行的,可以利用该技术测定坝坡变形直至破坏的完整过程,这也为后续组合坝大型振动台及类似试验的坝坡斜面破坏过程的监测提供了可行的手段。A series of concrete-rockfill combination dam model tests are conducted on the basis of a small shaking table.We analyse the deformation rules of the downstream slope of this dam at different acceleration amplitudes,frequencies and durations conditions by using the conventional image tagging method.Besides,we discuss and analyze whether PIV（Particle Image Velocimetry）technology can reflect the damage process of the dam slope.The results show that：on the concrete-rockfill combination dam slope,the displacement of rockfill increases with the increase of acceleration amplitudes and vibration frequencies,and it enlarges with the increase of vibration duration,but the displacement of rockfill is stable within a certain moment and the concrete-rockfill combination dam＇s movement of rockfill particles on the downstream slope is consistent with the general rules of earth rockfill dam;PIV technology is feasible for concrete-rockfill combination dam to monitor the process of vibration damage in the plane of the dam slope.It can be used to measure the process of the slope deformation until it damages,and it provides a visible method to monitor the process of vibration damage in the plane of the dam slope for subsequent concreterockfill combination dam shaking table test and similar tests.

关 键 词：混凝土-堆石组合坝 小型振动台 模型试验 PIV 坝坡 

分 类 号：TV641.4[水利工程—水利水电工程]