Entity

Time filter

Source Type


Huang Z.-P.,Yangtze River Scientific Research Institute | Huang Z.-P.,Jinping fety Monitoring and Management Center | Dong Y.-J.,Jinping fety Monitoring and Management Center | Dong Y.-J.,Mid South Design and Research Institute for Hydroelectric Projects | And 4 more authors.
Yantu Lixue/Rock and Soil Mechanics | Year: 2012

The excavation height of left slopes at Jinping I hydropower station is 530 m; faults and deep fracture were developed, unloading range is deep; and its geological conditions is complicated. Slope stability problems are important especially in the construction and operation. The engineering monitoring geological conditions of the slope is analyzed; deformation monitoring layout for the slope is described. The deformation monitoring system of the slope consists of surface deformation observation, shallow deformation observation and deep deformation observation. In three levels, monitorings of the slope deformation are made. For the surface deformation monitoring the geodetical surveying method is used; for the shallow deformation observation the multi-point displacement meters are used; the monitoring depth is 0-90 m; for the deep deformation observation the flat hole ranging, level survey and graphite convergence meters methods, etc, are used installed in exploration flat hole, through the main fault and deep crack, the biggest monitoring depth reach 260 m. By May 2011, monitoring data indicate that the maximum horizontal displacement in surface and shallow is 106.1 mm; the maximum settlement is 58.6 mm; which are controlled by excavation and supporting; the maximum horizontal displacement in deep is 47.48 mm; the maximum settlement is 7.2 mm, controlled by faults and deep fractures. The displacement tends to converge, the maximum deformation rate is 0.1 mm/d; and it meets the designed safety standards, slope has verged to stable. Source


Huang Z.-P.,Yangtze River Scientific Research Institute | Zhou J.-P.,Ertan Hydroelectric Development Co. | Xu A.-P.,Mid South Design and Research Institute for Hydroelectric Projects | He X.-G.,Mid South Design and Research Institute for Hydroelectric Projects | Dong Y.-J.,Mid South Design and Research Institute for Hydroelectric Projects
Yantu Lixue/Rock and Soil Mechanics | Year: 2011

Loading experiment process, safety monitoring method and results of rock-anchored beam in Jinping I hydropower station underground powerhouse, are introduced. The results show that anchor stress, crack openings, rock deformation and anchoring load losses are caused by secondary stress; their increments caused by test loads is far less than monitoring physical quantities; most of the anchor bolts stresses are tensiles. C anchor stress increment reflects more sensitive than A, B anchor stress increments; anchor stress increment diminishes quickly with the buried depth increases; during the whole process, all levels of load variation monitoring physical quantities are less than their design control standard values. It is suggested that the rock anchor beam design and construction should consider surrounding rock and rock anchor beam jointed effects in surrounding rock deformation. Source

Discover hidden collaborations