The dam heightening,which is an effective way to increase reservoir volume,has been paid close attention by engineers.Three problems should be dealt with when an arch dam needs to be heightened:stress state getting wo...The dam heightening,which is an effective way to increase reservoir volume,has been paid close attention by engineers.Three problems should be dealt with when an arch dam needs to be heightened:stress state getting worse at dam heel,cracking on new added concrete dam surface,and weak bonding between new added concrete and old dam.Taking Geba arch dam as an example,these problems are examined in details through simulation analysis by the finite element method.The tensile stresses on dam’s surface and joint face that have certain relations to the dam heightening can be controlled by some measures.展开更多
With the increasing efforts to protect the safety of drinking water in rural areas,brackish groundwater,as a drinking water resource,needed desalinating urgently in the western region of China.In response to this prob...With the increasing efforts to protect the safety of drinking water in rural areas,brackish groundwater,as a drinking water resource,needed desalinating urgently in the western region of China.In response to this problem,static and dynamic single stacked tray and two stacked tray distillation experiments were researched on steady-state conditions.Results reflected the way how the efficiency of展开更多
文摘The dam heightening,which is an effective way to increase reservoir volume,has been paid close attention by engineers.Three problems should be dealt with when an arch dam needs to be heightened:stress state getting worse at dam heel,cracking on new added concrete dam surface,and weak bonding between new added concrete and old dam.Taking Geba arch dam as an example,these problems are examined in details through simulation analysis by the finite element method.The tensile stresses on dam’s surface and joint face that have certain relations to the dam heightening can be controlled by some measures.
文摘With the increasing efforts to protect the safety of drinking water in rural areas,brackish groundwater,as a drinking water resource,needed desalinating urgently in the western region of China.In response to this problem,static and dynamic single stacked tray and two stacked tray distillation experiments were researched on steady-state conditions.Results reflected the way how the efficiency of
