摘要
Abstract
By taking the key technologies for construction of super-high arch dam in severe cold and strong seismic region as the objective,the countermeasures,such as the shape margin design,dam body cracking control,integrated seismic control,etc.,are adopted for the key technologies of the selection of foundation face,dam stress control and dynamic response analysis,stabilization of abutment deformation,dam body cracking control,integral anti-disaster ability of dam,etc.for the construction of QBT Project.The result shows that the shape of the arch dam from the multi-objective optimization has the characteristics of strong adaptability,better seismic performance,sufficient safety,high integral safety.It is indicated from the result that combined with in the intelligent temperature control measure,the adoptions of low thermal cement and full-sectional insulation of dam body can effectively decrease the temperature stress for controlling the occurrence of crack and solving a series of the construction contradictions for control of the construction period within severe-cold region,i.e.short time limit for construction,large volume of concrete placement,coordination between temperature control and concrete placing strength,etc.,thus ensuring the safe operation of the project during both the construction and the operation periods.The adoption of the integrated seismic measure makes a better integrity for the dam body under the effect of the design earthquake,which can meet the relevant requirement of the seismic design.The study result can provide more beneficial references for the dam construction in severe-cold and strong seismic region in the days to come.关键词
严寒/强震/特高拱坝/体形裕度设计/智能温控/综合抗震控制/QBT工程Key words
severe cold/strong seismic/super-high arch dam/shape margin design/intelligent temperature control/integrated seismic control/QBT Project分类
建筑与水利
