摘要
针对冬季低温条件下面板坝接缝止水结构抗冻胀的可靠性问题,通过设计室内模型试验,模拟了不同降温速率下冻胀对锚固系统的拉拔破坏力值及冰与螺栓、冰与扁钢压条和冰与橡胶盖板的冻结强度参数。研究了冻融循环对C30混凝土中膨胀螺栓锚固力及不同灌封型式的影响。最后在分析漂浮冰块撞击防渗盖板产生破坏的基础上,结合试验测试结果,提出了寒冷地区止水锚固体系设计及施工中应注意的主要问题和建议。
A series of indoor model tests were carried out to explore the reliability of water - proof structure of concrete faced rockfill dam under the low temperature condition in winter. Through these tests, we simulated the destructing force of frost heav- ing to the anchorage system under different cooling down conditions, and also obtained the frost parameters of ice to flat steel lay- ering, to bolts and rubber covering plate. The influence of freeze - thaw cycling on anchoring force of expansion bolts in C30 can- crete and the various grouting - sealing patterns were researched. At last, aiming to the measured data in case of collision be- tween floating ice and the anti - seepage covering plates, the attention points and suggestions for the design of water - proof struc- tures and anchorage system of concrete faced rockfifl dam in cold area are put forward.
出处
《人民长江》
北大核心
2015年第10期24-28,33,共6页
Yangtze River
关键词
止水结构
冻胀
锚固系统
冻融循环
面板堆石坝
water - proof structure
frost heaving
anchorage system
freeze - thaw cycling
concrete faced rockfill dam
