Objectives and benefi ts of the project Flood control The Three Gorges Project (TGP) is a key project to the harnessing and development of the Yangtze River. The damsite is located at
UHV transmission technology is characterized with long transmission distance, large transmission capacity, low line loss and less land use. In China, SGCC had completed its 1 000 kV UHVAC pilot project by the end of 2...UHV transmission technology is characterized with long transmission distance, large transmission capacity, low line loss and less land use. In China, SGCC had completed its 1 000 kV UHVAC pilot project by the end of 2008. This paper reviews the construction of the project from the aspects of technology research and development, engineering design, equipment development, transportation and on-site construction, commissioning and operation. Since put into operation, the project has shown excellent performance till now.展开更多
The initial construction of earth pressure balance shield is one of the key links in the construction and has high safety risk. When there are important pipelines in the shield starting section, the deformation of the...The initial construction of earth pressure balance shield is one of the key links in the construction and has high safety risk. When there are important pipelines in the shield starting section, the deformation of the stratum is required to be high and the shield starting process is required to be strict. Therefore, the important pipelines should be protected before the shield construction, and the control of tunnel line type, shield driving parameters and posture should be strengthened during the construction. Through an engineering example, the paper introduces a construction technology for shield starting section to pass through important pipeline groups. Through pipeline protection and shield construction control, the smooth passage of shield is ensured, which can provide reference for similar engineering construction.展开更多
The shield machine passes through the shallow foundation stone arch bridge in the urban area with heavy traffic flow. Through analysis, it is necessary to reinforce the stone arch bridge in order to ensure the smooth ...The shield machine passes through the shallow foundation stone arch bridge in the urban area with heavy traffic flow. Through analysis, it is necessary to reinforce the stone arch bridge in order to ensure the smooth passage of the shield machine. In the traditional process of strengthening the bridge, the ground road does not have traffic guidance and modification conditions (vehicles are diverted to pass through the bridge), thus affecting the reinforcement of the bridge. By adding the internal arch box reinforcement to the bridge and optimizing the shield driving parameters, the construction quality of the shield machine and the segment construction quality are ensured, the shield machine can be ensured to pass through the stone arch bridge smoothly while meeting the safety of the bridge, and the construction cost is saved.展开更多
文摘Objectives and benefi ts of the project Flood control The Three Gorges Project (TGP) is a key project to the harnessing and development of the Yangtze River. The damsite is located at
文摘UHV transmission technology is characterized with long transmission distance, large transmission capacity, low line loss and less land use. In China, SGCC had completed its 1 000 kV UHVAC pilot project by the end of 2008. This paper reviews the construction of the project from the aspects of technology research and development, engineering design, equipment development, transportation and on-site construction, commissioning and operation. Since put into operation, the project has shown excellent performance till now.
文摘The initial construction of earth pressure balance shield is one of the key links in the construction and has high safety risk. When there are important pipelines in the shield starting section, the deformation of the stratum is required to be high and the shield starting process is required to be strict. Therefore, the important pipelines should be protected before the shield construction, and the control of tunnel line type, shield driving parameters and posture should be strengthened during the construction. Through an engineering example, the paper introduces a construction technology for shield starting section to pass through important pipeline groups. Through pipeline protection and shield construction control, the smooth passage of shield is ensured, which can provide reference for similar engineering construction.
文摘The shield machine passes through the shallow foundation stone arch bridge in the urban area with heavy traffic flow. Through analysis, it is necessary to reinforce the stone arch bridge in order to ensure the smooth passage of the shield machine. In the traditional process of strengthening the bridge, the ground road does not have traffic guidance and modification conditions (vehicles are diverted to pass through the bridge), thus affecting the reinforcement of the bridge. By adding the internal arch box reinforcement to the bridge and optimizing the shield driving parameters, the construction quality of the shield machine and the segment construction quality are ensured, the shield machine can be ensured to pass through the stone arch bridge smoothly while meeting the safety of the bridge, and the construction cost is saved.
