地质体与人造工程几何形态极其复杂,其三维可视化是地学的一个难题。通过多层 DEM 形成层状地质体界面,在此基础上,借助中轴变换技术概念,用地层厚度和地层中层面将地层的形状特征及拓扑关系表现出来,建立了一个判断地层任意位置属性值...地质体与人造工程几何形态极其复杂,其三维可视化是地学的一个难题。通过多层 DEM 形成层状地质体界面,在此基础上,借助中轴变换技术概念,用地层厚度和地层中层面将地层的形状特征及拓扑关系表现出来,建立了一个判断地层任意位置属性值的方法,藉此运用空间插值技术、等值线生成技术、扫描表示技术等可视化技术将地层以及地下工程开挖绘制出来,避免了复杂的开挖体元属性及形体判断和开挖面与体元求交过程。采用此方法实现了某水电站地层与厂房基坑开挖三维可视化。展开更多
Rockburst,earthquake and blasting cause some dynamic loads on rock support and rock reinforcement system.Elements of rock support and rock reinforcement are generally made of steel bar or cables,which are resistant ag...Rockburst,earthquake and blasting cause some dynamic loads on rock support and rock reinforcement system.Elements of rock support and rock reinforcement are generally made of steel bar or cables,which are resistant against corrosion.These support elements may be subjected to vibrations induced by turbines,vehicle traffic and long-term corrosion in addition to dynamic loading caused by earthquake,rockburst and blasting.In this study,some theoretical,numerical and experimental studies are conducted on rockbolts and rock anchors under shaking and impulsive loading.Then the outcomes of these studies are presented and their practical implications are discussed accordingly.展开更多
文摘地质体与人造工程几何形态极其复杂,其三维可视化是地学的一个难题。通过多层 DEM 形成层状地质体界面,在此基础上,借助中轴变换技术概念,用地层厚度和地层中层面将地层的形状特征及拓扑关系表现出来,建立了一个判断地层任意位置属性值的方法,藉此运用空间插值技术、等值线生成技术、扫描表示技术等可视化技术将地层以及地下工程开挖绘制出来,避免了复杂的开挖体元属性及形体判断和开挖面与体元求交过程。采用此方法实现了某水电站地层与厂房基坑开挖三维可视化。
文摘Rockburst,earthquake and blasting cause some dynamic loads on rock support and rock reinforcement system.Elements of rock support and rock reinforcement are generally made of steel bar or cables,which are resistant against corrosion.These support elements may be subjected to vibrations induced by turbines,vehicle traffic and long-term corrosion in addition to dynamic loading caused by earthquake,rockburst and blasting.In this study,some theoretical,numerical and experimental studies are conducted on rockbolts and rock anchors under shaking and impulsive loading.Then the outcomes of these studies are presented and their practical implications are discussed accordingly.
