高混凝土面板堆石坝波形止水带数值模拟分析
|
摘要
高混凝土面板堆石坝接缝中支撑橡胶棒在变形和水压下不沉入接缝是波形止水带发挥作用的关键。结合某200 m级高面板堆石坝,采用ABAQUS软件对周边缝波形止水带进行了数值模拟计算,分析了在不同条件下止水带的变形以及应力应变分布。结果表明,波形止水带具有较强的适应变形能力,但由于自身刚度较小,当受到水压作用时,主要依靠其下面橡胶棒的支撑作用,确保波形止水带可以保持在接缝缝口。
It is the key for corrugated waterstop of high concrete faced rockfill dams( CFRDs) to keep the supporting rubber bar from sinking into joint under the actions of deformation and the water pressure. Taking a CFRD of 200 m-high level as case study,the numerical analysis of corrugated waterstop at peripheral joints is conducted by using ABAQUS. The deformations and the stress and strain distributions of corrugated waterstop under different conditions are analyzed. The results show that the corrugated waterstop has strong ability to adapt to the deformation of dam body,but due to its small stiffness,the corrugated waterstop relies mainly on lower supporting rubber to keep itself above the joint under water pressure.
It is the key for corrugated waterstop of high concrete faced rockfill dams( CFRDs) to keep the supporting rubber bar from sinking into joint under the actions of deformation and the water pressure. Taking a CFRD of 200 m-high level as case study,the numerical analysis of corrugated waterstop at peripheral joints is conducted by using ABAQUS. The deformations and the stress and strain distributions of corrugated waterstop under different conditions are analyzed. The results show that the corrugated waterstop has strong ability to adapt to the deformation of dam body,but due to its small stiffness,the corrugated waterstop relies mainly on lower supporting rubber to keep itself above the joint under water pressure.
引文
[1]贾金生,郦能惠,徐泽平,等.高混凝土面板坝安全关键技术研究[M].北京:中国水利水电出版社,2014.
[2]徐耀,郝巨涛.混凝土面板堆石坝面板接缝止水技术的发展与展望[J].中国水利水电科学研究院学报,2018,16(5):457-465.
[3]中国水利水电科学研究院.清江水布垭混凝土面板堆石坝新型止水结构与新型止水材料研究报告[R].北京:中国水利水电科学研究院,1998.
[4] HAO Jutao,LU Yihui,JIA Jinsheng,et al. Adaptability of slab joint waterstops to very high CFRDs[J]. Hydropower&Dams,2010,17(1):78-83.
[5]贾金生,郝巨涛,吕小彬,等.高混凝土面板堆石坝周边缝新型止水[J].水利学报,2001,1(2):35-38.
[6]中国水利水电科学研究院. 300 m级高面板堆石坝防渗和止水系统适应性研究成果报告[R].北京:中国水利水电科学研究院,2009.
[2]徐耀,郝巨涛.混凝土面板堆石坝面板接缝止水技术的发展与展望[J].中国水利水电科学研究院学报,2018,16(5):457-465.
[3]中国水利水电科学研究院.清江水布垭混凝土面板堆石坝新型止水结构与新型止水材料研究报告[R].北京:中国水利水电科学研究院,1998.
[4] HAO Jutao,LU Yihui,JIA Jinsheng,et al. Adaptability of slab joint waterstops to very high CFRDs[J]. Hydropower&Dams,2010,17(1):78-83.
[5]贾金生,郝巨涛,吕小彬,等.高混凝土面板堆石坝周边缝新型止水[J].水利学报,2001,1(2):35-38.
[6]中国水利水电科学研究院. 300 m级高面板堆石坝防渗和止水系统适应性研究成果报告[R].北京:中国水利水电科学研究院,2009.