Hanping tunnel is a control project of national highway 310 Dahejia to Qingshui highway project.It needs to cross a 330kV high-voltage transmission line under the condition of small clear distance,which requires high ...Hanping tunnel is a control project of national highway 310 Dahejia to Qingshui highway project.It needs to cross a 330kV high-voltage transmission line under the condition of small clear distance,which requires high construction requirements.In view of the difficulties such as shallow buried depth of tunnel and small clear distance between tunnel and tower of high-voltage line,multiple excavation blasting method is adopted,and smooth blasting,charge quantity control and damping hole setting are comprehensively used to reduce the impact on the tower and structure of high-voltage line.In order to ensure the smooth progress of the project,the large-scale finite element analysis software is used to simulate the whole excavation project.The influence of the full-section method and the middle partition wall method(CD method)on the surrounding rock and the high-voltage electric tower is compared.It is found that the CD method can effectively control the displacement of the surrounding rock and the tower on it and the uneven settlement.展开更多
针对目前国内带电更换500 k V紧凑型线路直线塔整串绝缘子关键工具存在的不足,研制了六联板脖颈吊具、六联板脖颈卡和远方进入等电位特制滑车等带电作业新型关键工具,并通过模拟带电更换500 k V紧凑型线路直线塔绝缘子的作业操作,验证...针对目前国内带电更换500 k V紧凑型线路直线塔整串绝缘子关键工具存在的不足,研制了六联板脖颈吊具、六联板脖颈卡和远方进入等电位特制滑车等带电作业新型关键工具,并通过模拟带电更换500 k V紧凑型线路直线塔绝缘子的作业操作,验证了带电作业新型关键工具在实践操作上的可行性和安全可靠性。展开更多
基金National Key Research and Development Program(Research on Key Technologies for the Operation and Maintenance of Typical Urban Traffic Infrastructure Safety)(2017YFC0806000)Chinese Academy of Engineering Institute-Local Cooperation Project(2019-CQ-ZD-4)。
文摘Hanping tunnel is a control project of national highway 310 Dahejia to Qingshui highway project.It needs to cross a 330kV high-voltage transmission line under the condition of small clear distance,which requires high construction requirements.In view of the difficulties such as shallow buried depth of tunnel and small clear distance between tunnel and tower of high-voltage line,multiple excavation blasting method is adopted,and smooth blasting,charge quantity control and damping hole setting are comprehensively used to reduce the impact on the tower and structure of high-voltage line.In order to ensure the smooth progress of the project,the large-scale finite element analysis software is used to simulate the whole excavation project.The influence of the full-section method and the middle partition wall method(CD method)on the surrounding rock and the high-voltage electric tower is compared.It is found that the CD method can effectively control the displacement of the surrounding rock and the tower on it and the uneven settlement.
