Abthors introduce the notation of generalized geometric constructions in Rm generated by a directed graph G and by a sequence of similarity ratios which are labelled with the edges of this graph. In this paper, it is ...Abthors introduce the notation of generalized geometric constructions in Rm generated by a directed graph G and by a sequence of similarity ratios which are labelled with the edges of this graph. In this paper, it is obtained the Hausdorff dimension and measure of this construction object for some cases.展开更多
The article combines institutional change and social participation of the subjects. By investigating the expanding of community subject and gradually cultivating their ability to participate,we can test the achievemen...The article combines institutional change and social participation of the subjects. By investigating the expanding of community subject and gradually cultivating their ability to participate,we can test the achievements of community development in our country,and lay a foundation for reaching the social development goals.展开更多
[目的]研究地铁隧道近距离下穿施工对既有地铁车站及高架桩基的影响。[方法]以合肥S1线五里墩站安全线隧道施工近距离下穿既有地铁2号线五里墩站为背景,利用有限元软件ABAQUS对项目施工全过程进行三维建模,对比分析了逐线开挖和两线同...[目的]研究地铁隧道近距离下穿施工对既有地铁车站及高架桩基的影响。[方法]以合肥S1线五里墩站安全线隧道施工近距离下穿既有地铁2号线五里墩站为背景,利用有限元软件ABAQUS对项目施工全过程进行三维建模,对比分析了逐线开挖和两线同时开挖两种方案下车站结构和高架桩基的变形。为考察类似工程在不同土体条件下的适用性,通过改变隧道处土体黏聚力和弹性模量两参数,分析了两参数在隧道开挖过程中对土体以及车站底板沉降的影响。[结果及结论]隧道开挖完成后,2号线五里墩站底板在两种方案下的最大沉降相近,分别为0.73 mm和0.77mm,均满足控制标准要求;当土体的黏聚力和弹性模量分别小于70 k Pa和100 MPa时,隧道开挖过程中车站结构的沉降和桩基的水平位移开始显著增大,应对此引起重视。展开更多
文摘Abthors introduce the notation of generalized geometric constructions in Rm generated by a directed graph G and by a sequence of similarity ratios which are labelled with the edges of this graph. In this paper, it is obtained the Hausdorff dimension and measure of this construction object for some cases.
基金the staged achievement of the MOE(Ministry of Education in China)Project of Humanities and Social Sciences(Project No.11YJC 840052)
文摘The article combines institutional change and social participation of the subjects. By investigating the expanding of community subject and gradually cultivating their ability to participate,we can test the achievements of community development in our country,and lay a foundation for reaching the social development goals.
文摘[目的]研究地铁隧道近距离下穿施工对既有地铁车站及高架桩基的影响。[方法]以合肥S1线五里墩站安全线隧道施工近距离下穿既有地铁2号线五里墩站为背景,利用有限元软件ABAQUS对项目施工全过程进行三维建模,对比分析了逐线开挖和两线同时开挖两种方案下车站结构和高架桩基的变形。为考察类似工程在不同土体条件下的适用性,通过改变隧道处土体黏聚力和弹性模量两参数,分析了两参数在隧道开挖过程中对土体以及车站底板沉降的影响。[结果及结论]隧道开挖完成后,2号线五里墩站底板在两种方案下的最大沉降相近,分别为0.73 mm和0.77mm,均满足控制标准要求;当土体的黏聚力和弹性模量分别小于70 k Pa和100 MPa时,隧道开挖过程中车站结构的沉降和桩基的水平位移开始显著增大,应对此引起重视。