水利学报2018，Vol.49Issue(3)：343-352,10.DOI:10.13243/j.cnki.slxb.20171070
碾压混凝土拱坝分缝防裂设计关键问题研究
Study on several key problems about anti-cracking design of induced joints in RCC archdams
摘要
Abstract
After decades of practice,it has been proved that setting joints in the dam is an effective measure to prevent cracks in a dam.As for RCC arch dams,transverse joints and induced joints are usually discussed together,and they have played a synergistic effect of preventing cracks because of their different structural features.However,in practical engineering,cracks haven't appeared in a lot of RCC arch dams or some cracks appeared in the positions where joints are not set,which means that the induced joints haven't met the expectations to induce cracks,instead,they bring some additional effects.In many reasons,improperly arrangement of induced joints affected the most.Since the Thermal Stress of RCC arch dam is complicated,changeable and dynamical,the anti-crack design must truly reflect the whole process of dam behavior from construction to operation.Practical application shows that the research of anti-cracking design based on the overall process simulation technology of the whole dam is an effective method,in which the induced joints and transverse joints of the RCC arch dam are simulated with open-closed iterative function,and the Equivalent Strength Theory is adopted for the failure criterion.Study on joints design and structural types of interface according to the simulation results can make the cracks appear as expected,releasing the tension stress caused by the temperature drop,which makes the construction quality of concrete of dam be ensured.关键词
RCC拱坝/防裂设计/诱导缝/等效强度Key words
RCC arch dams/anti-cracking design/induced joints/equivalent strength分类
建筑与水利引用本文复制引用
李海枫,杨波,张国新,徐秀鸣..碾压混凝土拱坝分缝防裂设计关键问题研究[J].水利学报,2018,49(3):343-352,10.基金项目
国家自然科学基金项目(51779276,51579252,51779277) （51779276,51579252,51779277）
中国水科院科研专项(SS0145B122018,SS0145B932017) （SS0145B122018,SS0145B932017）
水利部技术示范项目(SF-201701) （SF-201701）
