Hydrochina Guiyang Engineering Corporation

Guiyang, China

Hydrochina Guiyang Engineering Corporation

Guiyang, China

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Ni T.,University of Sichuan | Tang L.,Hong Kong Polytechnic University | Wen H.,Hydrochina Guiyang Engineering Corporation
Green Building, Materials and Civil Engineering - Proceedings of the 4th International Conference on GreenBuilding, Materials and Civil Engineering, GBMCE 2014 | Year: 2015

In this paper, the risks of asset-backed securitization for hydropower stations are measured using analytic hierarchy process. Risk assessment indexes in levels are identified according to the general principles of risk identification and the nature of hydropower projects. In order to dealing with both qualitative and quantitative data, fuzzy triangular numbers are introduced. A case study on risk evaluation of hydropower project is used to illustrate the application potentiality of the proposed approach. © 2015 Taylor & Francis Group, London, UK.


Chen Z.,Hydrochina Guiyang Engineering Corporation
Shuili Fadian Xuebao/Journal of Hydroelectric Engineering | Year: 2011

In this paper a mathematical analysis method is adopted to develop relationships between head, flow and output of turbine, and a function of turbine output is derived for the capacity expansion of Honglin hydropower on Maotiao river. Preliminary schemes were determined by the principle of output maximization, and then a comprehensive study on these schemes was conducted through an analysis of operation stability and an economic comparison. This work provides a reference for optimization design of capacity expansion and hydropower renovation. © Copyright.


Sun F.-T.,Wuhan University | She C.-X.,Wuhan University | Wan L.-T.,Wuhan University | Jiang Q.-R.,Hydro China Guiyang Engineering Corporation
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2014

Three 3D morphology parameters independent of measurement scale within limits are introduced to characterize the morphology characteristics of rock joints, and a new peak shear strength criterion for the rock joints is developed based on the morphology parameters. Then, both the new criterion and Barton's criterion are adopted to calculate the peak shear strength of 23 pairs of rock joints. By comparing the calculated and tested peak shear strengths, the new criterion is proved to be more reasonable, while the peak shear strength calculated by Barton's formula is underestimated. The new criterion has a clear physical meaning because the contribution of different morphology characteristics to the peak shear strength is represented in detail by the three morphology parameters, and it is also convenient for the new criterion to be applied to engineering practice since the morphology parameters can be measured by any scale within some limits. Furthermore, the new criterion is essentially the generalized 3D form of Patton's criterion as it can be simplified to Patton's formula when applied to regular joints.


Liu J.,China Three Gorges University | Li J.,China Three Gorges University | Zhang Y.,HydroChina Guiyang Engineering Corporation | Zhu T.,China Three Gorges University | And 2 more authors.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2010

Using RMT-150C rock mechanics test system, experimental tests of different kinds of rock materials under cyclic loading with the test condition of different stress levels and loading rates are carried out. Based on the division of stress and strain curves under loading and unloading conditions, the energy dissipation rate during unloading process is defined; and energy conversion during rock damage process is explored. Meanwhile, change laws of the deformation parameters such as the elastic modulus, Poisson's ratio and residual strain are also analyzed quantitatively. The research results indicate that the higher the stress level and loading frequency are, the stronger the lithology is, the greater the hysteresis loop area, doing work the process of loading and the release elastic energy during the unloading process are; besides, the rock is softer, the energy conversion rate is higher. Before rock mass does not reach the peak value of compressive strength, the higher the stress level is, the greater the elastic modulus is, which shows that within the range of the rock mass compressive strength, with the higher loads, the deformation ability of rock mass under the same load increment weakens significantly when the gap and micro defect are compacted. Meanwhile, it can be given that fatigue strength will reduce when the frequency increases to a certain level. As a whole, the axial and lateral relative residual strains of rock decrease gradually with the increase in cycle numbers.


Tang Q.,Leshan Normal University | Tang Q.,Nanyang Technological University | Lin S.,Nanyang Technological University | Lin S.,Hydrochina Guiyang Engineering Corporation | And 3 more authors.
Ultrasonics Sonochemistry | Year: 2013

This work investigated the ultrasonic assisted oxidative desulfurization of bunker-C oil with TBHP/MoO3 system. The operational parameters for the desulfurization procedure such as ultrasonic irradiation time, ultrasonic wave amplitude, catalyst initial concentration and oxidation agent initial concentration were studied. The experimental results show that the present oxidation system was very efficient for the desulfurization of bunker-C oil and ∼35% sulfur was removed which was dependent on operational parameters. The application of ultrasonic irradiation allowed sulfur removal in a shorter time. The stronger the solvent polarity is, the higher the sulfur removal rate, but the recovery rate of oil is lower. The sulfur compounds in bunker-C oil reacted with TBHP to produce corresponding sulfoxide, and further oxidation produced the corresponding sulfone. © 2013 Elsevier B.V. All rights reserved.


Fu X.,Chinese Academy of science | Fu X.,University Paul Sabatier | Feng X.,Chinese Academy of science | Guo Y.,HydroChina Guiyang Engineering Corporation | And 3 more authors.
Journal of Geophysical Research: Atmospheres | Year: 2013

Transformation and distribution of mercury (Hg) species play an important role in the biogeochemical cycling of mercury in aquatic systems. Measurements of water/air exchange fluxes of Hg, reactive mercury (RHg), and dissolved gaseous mercury (DGM) concentrations were conducted at 14 sites in five reservoirs on the Wujiang River, Guizhou, Southwest China. Clear spatial and temporal variations in Hg fluxes, RHg, and DGM concentrations were observed in the study area. Hg fluxes and RHg concentrations exhibited a consistent diurnal variation in the study area, with maximum fluxes and concentrations during daytime. A typical diurnal trend of DGM with elevated concentration at night was observed in a eutrophic reservoir with elevated bacteria abundance, suggesting a bacteria-induced production of DGM in this reservoir. For other reservoirs, a combination of sunlight-stimulated production and loss via photo-induced oxidation and evaporation regulated the diurnal trends of DGM. Seasonal variations with elevated Hg fluxes and RHg concentrations in warm season were noticeable in the study area, which highlighted the combined effect of interrelationships between Hg species in water and environmental parameters. Hg fluxes exhibited much more significant correlations with RHg and THg concentrations and air temperature compared to DGM concentrations and solar radiation. The measured fluxes were significantly higher than those simulated using the water/air thin film Hg0 gradient model. Aside from the potential limitations of dynamic flux chamber method, this may also suggest the thin film gas exchange model is not capable of predicting water/air Hg flux under low wind speed conditions. Additionally, it is speculated that DGM concentrations might vary significantly in surface waters with depth, and measurements of DGM at a depth of 2-4 cm below the water surface probably underestimated the DGM concentration that should be taken into account in simulations of water/air flux using the thin film gas exchange model. An empirical model of water/air Hg flux was developed, and the simulated fluxes were compared well with measurements. The model yields a mean annual Hg emission of 3.21.0 kg in the study area. © 2013. American Geophysical Union. All Rights Reserved.


Tang Q.,Leshan Normal University | Tang Q.,Nanyang Technological University | Lin S.,Hydrochina Guiyang Engineering Corporation | Cheng Y.,Leshan Normal University | And 2 more authors.
Biochemical Engineering Journal | Year: 2013

This work investigated the effect of ultrasound on the biodesulfurization of bunker oil by the native microbial cells in oil/water biphasic system. The operational parameters for the desulfurization procedure such as ultrasonic irradiation time, ultrasonic wave amplitude, biocatalyst initial concentration and ratio of oil phases to aqueous phases were studied. An obviously positive effect was observed after introduction of ultrasound into the BDS system. The sulfur content of bunker oil did not decrease in absence of ultrasound pre-treatment. After ultrasonic pre-treatment, about 10-20% of sulfur was removed for the samples without any additive and was dependent on ultrasonic irradiation time, ultrasonic wave amplitude, biocatalyst initial concentration and ratio of oil phases to aqueous phases. During the desulfurization, even though an easily available carbon source, glycerol, was supplied, some low molecular weight hydrocarbons can be consumed by cells as carbon source, resulting in a loss in the fuel value or energy loss. © 2013 Elsevier B.V.


Li J.-W.,Chang'an University | Zhang G.-Q.,Chang'an University | Zhang B.,Hydro China Guiyang Engineering Corporation Co.
Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | Year: 2014

The authors took Jianghai Zhida Bridge plan I, Jianghai Zhida Bridge plan II and 3rd Nanjing Yangtze River Bridge as examples. Based on the stress state of the main beam, the allowable amplitudes of bending vortex-induced resonance of steel bridge towers were calculated and the relationship between the allowable amplitudes and tower height was studied. An estimation formula for the allowable amplitudes of bending vortex-induced resonance of steel bridge towers were determined with the parameter of tower height. For self-supporting bridge tower, the allowable amplitude of bending vortex-induced resonance of the tower was estimated. When the allowable amplitude of vertical vortex-induced resonance of the beam reached its maximum value, a ratio between the vertical bending stress at the key section and the permissible bending stress of the steel for the beam was used for the estimation. The wind tunnel tests for aeroelastic models of bridge towers were conducted. The results show that the ratio between the maximum allowable bending stress produced by main beam vertical vortex-induced resonance and the allowable bending stress of the steel for the beam is a certain value. When the amplitude of the towers produced by the tower vortex-induced resonance reaches the maximum allowable values, the ratio between the vertical bending stress at the key section and the allowable stress of the steel for the beam is also a certain value. The maximum allowable amplitude ratio of bending vortex-induced resonance of steel bridge towers is about 0.12%. The results can provide reference for the determination of allowable amplitude for vertex-induced resonance of large-span bridge towers.


Xu G.,Nanjing Hydraulic Research Institute | Li S.,HydroChina Guiyang Engineering Corporation Ltd
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2016

Laterally loaded vertical piles with load-relief platform has successfully been introduced to deep-water sheet-pile bulkhead so that a part of massive lateral load due to horizontal soil movement can be transferred through pile group on to deeper and larger soil layers to keep the bulkhead stable within allowable displacement limits. Two types of head fixity conditions, capped head and pinned head, are often used in pile group. Obviously, head fixity conditions have great effects on force bearing status and displacement characteristics of cast-in-place piles, load-relief platform and other structural elements in the sheet-pile bulkhead. Two series of centrifuge model tests are carried out to simulate the sheet-pile bulkheads with pile group with two different head fixity conditions. The bending moments of piles and front wall, earth pressures on retaining side of front wall are measured together with tension forces of tie-rod and horizontal displacements of structural elements. It is found that the lateral pile group with capped head is more powerful than the pile group with pinned head in carrying earth pressure load, reducing tension forces of tie-rods and limiting horizontal displacements of structural elements. However, it is also found that the maximum bending moments of piles with capped head occur close to the pile cap level, and the estimated values are equal to the value of pile's maximum allowable bending moment. Therefore, it is appropriate to the lateral pile group with pinned head which can eliminate the above problem while tension force of tie-rod and inclination of front wall due to horizontal displacement can also be controlled within their allowable limits. © 2016, Science Press. All right reserved.


Sun L.,Yangzhou University | Kong D.,Hydrochina Guiyang Engineering Corporation
Advances in Science and Technology of Water Resources | Year: 2014

In practical construction of arch dams, the actual values of some design parameters, such as the deformation modulus of a foundation rock mass, are often different from their design values. In order to adapt the arch dam to the change of design parameters, considering the uncertainty of the design parameters, the robust feasibility constraint condition was formulated with the maximal variation analysis method, and a robust feasibility optimization model for shape design of arch dams was established with consideration of uncertainty of the deformation modulus of the foundation rock mass. The optimization of a planned elliptic arch dam indicates that the optimized dam volume is 3.31% smaller than the initially designed dam volume, the optimized arch dam can adapt to the uncertainty of the deformation modulus of the foundation rock mass, and the dam stress can always meet the design requirements when the foundation deformation modulus changes within its range of variation. © 2014, Editorial Board of Advances in Science and Technology of Water Resources, Hohai University. All right reserved.

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