scholarly journals An Analysis on the First-Stage Diversion Construction Method of the Dam of the Congo (ZO) ZONGO II Hydropower Station

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Xifeng Liu
Keyword(s):  
Construction Method ◽  
Hydropower Station ◽  
Left Bank ◽  
Tail Water

The dam of the ZONGOII hydropower station in the Congo is located 800m downstream of the tail water outlet of the ZONGOⅠplant. The first phase of the diversion of the dam is carried out by installing a cofferdam on the left bank of the Inkisi River to carry out sand sluice and other projects. Due to the feasibility of the construction plan and the reasonable organization of the on-site personnel, the first phase of the diversion task was successfully completed.

The Stability Research and Evaluation of Jiuzi Collapse Accumulation

2012 ◽  
Vol 446-449 ◽  
pp. 2007-2010
Author(s):  
Ke Wang ◽  
Chang Ming Wang ◽  
Cen Cen Niu ◽  
Dong He Ma ◽  
Rong Lin
Keyword(s):  
Yunnan Province ◽  
Estimation Method ◽  
Assessment Method ◽  
Hydropower Station ◽  
Left Bank ◽  
Probability Assessment ◽  
Engineering Construction ◽  
Moment Estimation ◽  
Dam Site ◽  
The Stability

Collapse accumulation is one of the most common bad geology bodies in mountain and canyon regions in southwest of China. Jiuzi collapse accumulation, which is located in the left bank of 400~1200 meters from wanjiakouzi hydropower station in the Xuanwei city Yunnan province, is primarily performing as a collapse body with some sliding character. Due to the close location to the dam site, Jiuzi collapse accumulation shows a tremendous safe hidden trouble to the engineering construction, and studying on its stabilization is of prime importance. Taking Jiuzi collapse accumulation as an example, expound the application of the Rosenblueth moment estimation method into probabilistic analysis of slope stability, effectively combined the traditional safety factor method with probability assessment method.

scholarly journals Integrated Analysis of the Formation Mechanism of Cracks in a Concrete Dam Using Microseismic Monitoring and Numerical Simulation

2016 ◽  
Vol 2016 ◽  
pp. 1-11
Author(s):  
Gang He ◽  
Biao Li ◽  
Xuben Wang ◽  
Nuwen Xu
Keyword(s):  
Potential Risk ◽  
Microseismic Monitoring ◽  
Gravity Dam ◽  
Hydropower Station ◽  
Integrated Analysis ◽  
Left Bank ◽  
Concrete Gravity Dam ◽  
Simulation Results ◽  
The Right ◽  
Evolution Trend

The dam of Guanyinyan hydropower station is composed of a concrete gravity dam in the left bank and a rockfill dam in the right bank. During the operation of the hydropower station, several surface cracks occurred in the concrete gravity dam, which threatened the stability of the dam. To evaluate the evolution trend of the cracks and forecast the potential risk of the dam, the microseismic (MS) monitoring technique and finite-element method were used. First, the concrete three-point bending field test was performed to prove the reliability of the MS technique in monitoring the concrete cracks. The MS monitoring results were consistent with the simulation results. Then, the MS monitoring system was installed in the dam body. By analysing the MS activities before and after the impoundment, the evolution trend of the cracks and potential risk of the dam were evaluated and forecasted. The simulation results were also consistent with the monitoring results. These results can provide significant references for the operation safety of the dam and also present a new thought for the risk evaluation of similar dam engineering.

Sensor Network Optimal Design of Microseismic Monitoring System at the Left Slope of Jinping I Hydropower Station

2013 ◽  
Vol 353-356 ◽  
pp. 872-876 ◽  
Author(s):  
Gang He ◽  
Nu Wen Xu ◽  
Chun Sha ◽  
Li Tian
Keyword(s):  
Optimal Design ◽  
Monitoring System ◽  
Sensor Array ◽  
Sensor Arrays ◽  
Microseismic Monitoring ◽  
Hydropower Station ◽  
Left Bank ◽  
Rock Fracturing ◽  
Bank Slope ◽  
Jinping I Hydropower Station

In order to real time monitor and analyze the rock fracturing due to continuous construction and consolidation at the left slope of Jinping I hydropower station, southwest of China, a microseismic monitoring system was conducted and an optimal design for the sensor arrays was investigated. The sensor array was designed on the basis of P method and Powell algorithm. The artificial fixed blasting tests were applied to adjust the positioning accuracy of the monitoring system. The results show that the location error of seismic source is less than 12 m in the scope of the sensor array, which demonstrates the monitoring system has high positioning g accuracy. The contour of source location shows that the location errors near the main tunnels at the left bank slope is below 6 m. Signals from 689 microseismic events with moment magnitude ranging from -2.1 to -0.2 were recorded during the first year monitoring period from June 15, 2009. The spatial distribution of microseismicity can identify and delineate the potential failure at the left bank slope, which provides some references for the future excavation and consolidation of the hydropower station.

Mechanism of deep cracks in the left bank slope of Jinping first stage hydropower station

2004 ◽  
Vol 73 (1-2) ◽  
pp. 129-144 ◽  
Author(s):  
Shengwen Qi ◽  
Faquan Wu ◽  
Fuzhang Yan ◽  
Hengxing Lan
Keyword(s):  
Hydropower Station ◽  
Left Bank ◽  
Bank Slope

Numerical Simulation of Excavation of Abutment Slope at Left Bank in Dagangshan Hydropower Station

2012 ◽  
Vol 238 ◽  
pp. 313-316
Author(s):  
Kun Yang ◽  
Zhi Chao Ma ◽  
Hao Han
Keyword(s):  
Element Model ◽  
Hydropower Station ◽  
Left Bank ◽  
Geological Conditions ◽  
Potential Failure ◽  
Deformation Stress ◽  
The Stability ◽  
Dagangshan Hydropower Station ◽  
Failure Location ◽  
The Finite Element Model

The abutment slope at left bank in Dagangshan hydropower station has complex geological conditions with deep fractures, developed faults and unloading crack. The excavation will influence the stability of the slope. To evaluate the slope stability, the finite element model of this abutment slope was built in this paper to study the deformation, stress and plastic zone distribution of the slope during the excavation. The potential failure location of the slope is forecasted, some suggestions are proposed to be helpful to keep the stability of the slope.

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