[关键词]
[摘要]
复合土工膜心墙堆石坝是为了防止堆石坝渗流和应力变形问题而设计的一种新型坝体。以白龙江某复合土 工膜心墙堆石坝为例, 建立三维有限元模型, 并利用MIDAS/ GTS 大型岩土分析软件, 对正常蓄水期、正常蓄水期 加8 度地震烈度和无膜情况三种工况下坝体和复合土工膜心墙的应力变形进行了模拟, 分析了地震作用下复合土 工膜对坝体应力变形的影响。比较发现, 复合土工膜在很大程度上抑制了坝体的应力变形。
[Key word]
[Abstract]
Geomembr ane w all ro ck2fill dam is a new ro ck2fill dam to pr ev ent the seepag e and st ress deformation. A thr ee2dimen2 sio nal finite element model was dev elo ped fo r a composite geomembr ane w all rock2fill dam in Bailongjiang . The larg e geotechni2 cal analysis softw are MIDAS/ GTS was used to simulate the st ress deformat ion of the composite g eomembrane w all ro ck2fill dam under thr ee w o rking conditio ns, including the norma l sto rag e per iod, no rmal stor age per iod w ith 82deg ree ear thquake, and no rmal stor age period w ith 82deg ree ear thquake but w ithout membrane. T he effects of compo site g eomembrane o n the stress de2 fo rmation of the ro ck2fill dam w ere analyzed under eart hquake. The r esult s showed that t he compo site g eomembrane restr ains the str ess deformat ion of the r ock2f ill dam.
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[基金项目]
长江学者和创新团队发展计划( IRT 1139)