CAJ | 학술논문

在提出特高拱坝悬臂高度个性化控制概念的基础上,进一步给出特高拱坝施工期全坝段个性化悬臂高度控制的数值分析方法.以国内在建的某特高拱坝为例,考虑自重荷载、温度荷载、混凝土自身体积变形与徐变等因素影响,采用三维有限元方法对其进行仿真分析,研究了不同坝段在不同灌浆高程情况下的最大主应力极值随悬臂高度增加而变化的规律,并给出应力标准控制值下的全坝段悬臂高度控制值分布示意图.研究成果表明:大坝不同部位的悬臂控制高度未呈现可循规律,须实行个性化控制.悬臂高度个性化控制有利于优化施工进度,缩短施工工期,从而按计划实现坝体挡水度汛及预期发电等关键目标.
재제출특고공패현비고도개성화공제개념적기출상,진일보급출특고공패시공기전패단개성화현비고도공제적수치분석방법.이국내재건적모특고공패위례,고필자중하재、온도하재、혼응토자신체적변형여서변등인소영향,채용삼유유한원방법대기진행방진분석,연구료불동패단재불동관장고정정황하적최대주응력겁치수현비고도증가이변화적규률,병급출응력표준공제치하적전패단현비고도공제치분포시의도.연구성과표명:대패불동부위적현비공제고도미정현가순규률,수실행개성화공제.현비고도개성화공제유리우우화시공진도,축단시공공기,종이안계화실현패체당수도신급예기발전등관건목표.
In this paper,a concept of individual control over cantilever height of super-high dam was pro?posed. Based on this concept, a related numerical analysis method for determining the individual ultimate values of cantilever height under construction are presented. Taking a super-high arch dam under construc?tion in China as an example,the regularity of the extremum of the major principal stress varying with can?tilever height for different monolith in different joint-grouting period was analyzed by a 3D finite element method, with the effects of dead load, thermal load, concrete creep and its autogenously volume deforma?tion considered. Meanwhile, the allowable cantilever height for the arch dam under a standard control is presented graphically. The results indicate that the allowable cantilever heights for different monolith do not show distribution regularities, and individual control over cantilever height should be carried out in su?per-high arch dams. Individual control over cantilever height is favorable to optimize the construction prog?ress and shorten the construction period.