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Liu X.F.,Tianjin Research Institute for Water Transport Engineering | Zhang M.L.,China International Water and Electrical Corporation
Applied Mechanics and Materials | Year: 2014

After the Three Gorges Reservoir, sandy pebble Reach incoming water and sediment conditions has change, the changes of incoming water and sediment conditions might make sandy pebble reach riverbed scouring-erosion variation. This paper study on sandy pebble reach riverbed erosion and deposition basic law after the Three Gorges Reservoir, and provide the decision basis for large-scale system renovation in the middle Yangtze River. © (2014) Trans Tech Publications, Switzerland.

Yuan L.,China Agricultural University | Yuan L.,China Institute of Water Resources and Hydropower Research | Liu X.,China Institute of Water Resources and Hydropower Research | Wang X.,China Institute of Water Resources and Hydropower Research | And 4 more authors.
Shuili Fadian Xuebao/Journal of Hydroelectric Engineering | Year: 2012

This paper presents a shaking table test and model dam analysis by equivalent linear method for the highest core rock-fill dam in the world, the Shuangjiangkou dam, including vertical profiles of acceleration amplification factor and its variations along dam axis and in stream direction. The results show that the equivalent linear method is applicable to dynamic analysis of rock-fill dam, but its calculation error is quite obvious, because computed values smaller than the tested values could occur if FEM meets difficulties in accurate simulation of large deformation on incompact slope. This error becomes greater for stronger seismic inputs. The natural frequency of prototype dam estimated by similarity theory is close to the calculations. This work demonstrates that shaking table test provides important reference to study of dynamic characteristics of high rock-fill dam. © right.

Shi Z.-N.,Zhejiang University | Ran Q.-H.,Zhejiang University | Wu X.-S.,Zhejiang University | Chen H.-J.,China International Water and Electrical Corporation
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | Year: 2014

Pl-ot-scale laboratory experiments were conducted to study the impacts of different rainfall locations, as well as the related rainfall properties, on the hillslope soil erosion process. Three scenarios with different rainfall location were considered. The results showed that: peak discharge of both sediment and runoff decreased significantly as the rainfall getting farther from the outlet, and the erosion amount kept decreasing for the successive experiments. Both the largest value and the maximum decrease, between successive experiments, of peak sediment discharge occurred when rainfall is 2 m away from the outlet. Total sediment discharge was heavily influenced by rainfall intensity, while rainfall location played an important role when the intensity was weak. For the first experiment during each successive run, sediment concentration decreased as the rainfall getting farther from the outlet. Content of sand in the eroded material was significantly lower than the original soil composition on slope. On the whole, sediment concentration process curve in experiments of 3 m rainfall location reached stable state earlier than other scenarios, and resulted in the minimum standard deviation for the gradation of eroded material.

Li C.,Renmin University of China | Ye C.,North China Electrical Power University | Mou L.,China International Water and Electrical Corporation
Advanced Materials Research | Year: 2013

Under the background of low-carbon economy, it is necessary to modify and improve the existing economic benefits evaluation system for the construction projects of power generation industries. This paper firstly built an economic benefit evaluation index system for power generation projects based on low-carbon financial benefits and carbon-emission reduction efficiency. Then, it established an economic benefits evaluation model which uses entropy and AHP to determine combined weights, and Gray Relation Method for comprehensive evaluation. Finally, the empirical analysis of the construction of wind power projects verified the feasibility and effectiveness of the evaluation model. © (2013) Trans Tech Publications, Switzerland.

Yuan L.,China Agricultural University | Liu X.,Basin Water | Wang X.,Basin Water | Dai C.,China International Water and Electrical Corporation
Advanced Materials Research | Year: 2013

The pattern and characteristics of seismic damage for Shuangjiangkou ECRD and Houziyan CFRD models were studied through large-scale earthquake simulation shaking table tests in this work. The test results showed that the main earthquake damage pattern of rock-fill dam is permanent residual deformation and shallow slide on the downstream slope. Seismic residual deformation of rock-fill dam, which is filled and compacted well, is very small. Regardless of ECRD or CFRD, the horizontal displacement and settlement on downstream slope are significantly larger than upstream slope under empty reservoir. The analysis of residual deformation and vibration frequency before and after failure indicated that aseismic performance of CFRD is superior to ECRD. Because of the remarkable whipping effect in the high rock-fill dam, the key parts of aseismic design is downstream slope near the dam top, where appropriate aseismic measures should be taken. © (2013) Trans Tech Publications, Switzerland.

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