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An experimental study on plunging depth of density currents

Hassan GOLEIJ, Amir Hamzeh HAGHIABI, Abbas PARSAIE

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 4, Pages 388-395 doi: 10.1007/s11709-017-0417-7

Abstract: Mass density of the current flows is the one of the important problem in the hydraulics of the dam reservoir

Keywords： dense current plunge point Densimetric Froude Number dam reservoirs

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Long-term dam safety monitoring of Punt dal Gall arch dam in Switzerland

M. WIELAND, G.F. KIRCHEN

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 1, Pages 76-83 doi: 10.1007/s11709-012-0144-z

Abstract: The 130 m high Punt dal Gall dam is located at the Swiss-Italian border in the South-eastern part ofThe dam is founded on highly folded and partially crushed dolomite and limestone formations.For the monitoring of the dam deformations five inverted pendulums were installed in the dam and threein the rock foundation of the right abutment outside of the dam.The paper describes the long-term safety monitoring of this 42 years old arch dam.

Keywords： dam safety concept arch dam dam instrumentation dam safety monitoring

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A numerical study of non-Darcy flow in EGS heat reservoirs during heat extraction

Wenjiong CAO, Wenbo HUANG, Guoling WEI, Yunlong JIN, Fangming JIANG

Frontiers in Energy 2019, Volume 13, Issue 3, Pages 439-449 doi: 10.1007/s11708-019-0612-4

Abstract: It is deduced by analogy that the fluid flow in enhanced geothermal system (EGS) heat reservoirs maya transient 3D model was presented, taking into consideration the non-Darcy fluid flow in EGS heat reservoirsflow resistance in addition to the Darcy resistance which is imposed to the seepage flow in EGS heat reservoirsFurther, a criterion was analyzed and proposed to judge the onset of the non-Darcy flow in EGS heat reservoirsIf the calculated Forchheimer number is larger than 0.2, the fluid flow in EGS heat reservoirs experiences

Keywords： enhanced geothermal system non-Darcy flow heat extraction Reynolds number Forchheimer number

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China's High Dams Construction and Research on Science and Technology

Chen Zongliang

Strategic Study of CAE 2000, Volume 2, Issue 12, Pages 84-89

Abstract: The scientific and technological achievements and their application in geologic exploration, dam construction, flood discharging and energy dissipation, treatment of dam foundation and treatment of high rock slopeThey in elude the 181 m-high concrete gravity dam in the Three Gorges Project, the 240 m — highCFRD, the 233 m~high Shuibuya CFRD, the 130 m- high Shapai RCC arch dam, the 131 m- high Jiangya RCCgravity dam, etc.

Keywords： hydroelectric power high dam gravity dam arch dam roller compacted concrete dam (RC-CD) concrete facerockfill dam (CFRD)

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Features of seismic hazard in large dam projects and strong motion monitoring of large dams

Martin WIELAND,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1, Pages 56-64 doi: 10.1007/s11709-010-0005-6

Abstract: Earthquakes can affect large dam projects in many different ways.The May 12, 2008 Wenchuan earthquake has damaged 1803 dams and reservoirs, and 403 hydropower plantsAmong these dams were the 132-m-high Shapai RCC arch dam and the 156-m-high Zipingpu concrete face rockfilldam.These recently completed dams are dam types which, up to now, have not experienced strong ground shaking

Keywords： seismic hazard arch dam concrete face rockfill dam strong motion instrumentation reservoir-triggered

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Experimental study on the CO₂ foam injecting way of profile control and flooding in heterogeneous reservoirs

Zhao Jinsheng,Tan Junling,Gu Zhengfu,Liu Xiaochun

Strategic Study of CAE 2012, Volume 14, Issue 11, Pages 88-93

Abstract:

Aiming at the characteristic of the formation water of Huaqing Chang 6 reservoir and taking the comprehensive foaming ability as evaluation index, 6 foaming agents were optimized. ZY-1 foaming agent was the optimal foaming agent, and the optimal foaming agent concentration and foam stabilizer concentration were 0.5 % and 764 mg/L respectively. On the basis of the foaming agent optimization result, using parallel cores with approximate permeability contrast，CO2 foam flooding experiment was simulated through 2 injection way. The experiment result showed that underground foaming way, CO2 and the foaming agent injected alternately, had higher plugging differential pressure and better displacement efficiency. The optimal injection slug combination was first 0.2 PV (pore volume) foaming agent solution and then 0.4 PV CO2 gas, and the total injected volume was 0.6 PV.

Keywords： heterogeneous reservoirs CO₂ foam profile control and flooding injection parameter experimental

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Key problems and solutions in arch dam heightening

Zuoguang FU, Yunlong HE, Sheng SU

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1, Pages 98-104 doi: 10.1007/s11709-010-0004-7

Abstract: The dam heightening, which is an effective way to increase reservoir volume, has been paid close attentionThree problems should be dealt with when an arch dam needs to be heightened: stress state getting worseat dam heel, cracking on new added concrete dam surface, and weak bonding between new added concreteand old dam.The tensile stresses on dam’s surface and joint face that have certain relations to the dam heightening

Keywords： arch dam heighten tensile stress finite element method

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Influence of soft rock-fill material as dam embankment with central bituminous concrete membrane

Peter TSCHERNUTTER

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1, Pages 63-70 doi: 10.1007/s11709-010-0016-3

Abstract: relevant material parameters for a valuation of the deformation behavior of the up- and downstream damshell by means of an embankment dam of medium height.This gave rise to the necessity of adjusting the dam design of the downstream dam shoulder.Several times higher dam settlements as well as significant differential settlements between the up-and downstream dam shell were observed during construction and operation.

Keywords： embankment dam bituminous concrete membrane rock-fill material properties deformation behavior

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Evaluation method of dam behavior during construction and reservoir filling and application to real dams

Yuji KOHGO, Akira TAKAHASHI, Tomokazu SUZUKI,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1, Pages 92-101 doi: 10.1007/s11709-010-0009-2

Abstract: In this paper we analyzed a real fill-type dam, named the Minami-Aiki Dam, to verify a numerical consolidation

Keywords： fill dam consolidation analysis unsaturated geo-materials impounding construction

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Analysis of arch dam deformations

Franz PERNER, Pius OBERNHUBER,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1, Pages 102-108 doi: 10.1007/s11709-010-0012-7

Abstract: Predicting “regular” dam deformations for prevailing conditions and comparing them with observeddeformations is an essential part of dam surveillance.Prediction of dam deformations can be based on deterministic models, purely statistical models or so-calledstatic analyses, statistical models on the statistical analysis of previous deformation data.For annual reservoirsand the portion caused by temperature variation.The present article deals with the analysis of arch dam

Keywords： arch dam analysis Zillergruendl concrete temperature hybrid model

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The Cemented Material Dam: A New, Environmentally Friendly Type of Dam

Jinsheng Jia, Michel Lino, Feng Jin, Cuiying Zheng

Engineering 2016, Volume 2, Issue 4, Pages 490-497 doi: 10.1016/J.ENG.2016.04.003

Abstract:

The first author proposed the concept of the cemented material dam (CMD) in 2009.This concept was aimed at building an environmentally friendly dam in a safer and more economical wayfor both the dam and the area downstream.The concept covers the cemented sand, gravel, and rock dam (CSGRD), the rockfill concrete (RFC) dam (or the cemented rockfill dam, CRD), and the cemented soil dam (CSD).

Keywords： Cemented material dam (CMD) Cemented sand，gravel，and rock dam (CSGRD) Rockfill concrete (RFC) dam Cementedrockfill dam (CRD) Cemented soil dam (CSD) Material properties

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Advances in the technology of explosion in fracturesused in low permeability reservoirs

Li Decong,Chen Li,Lin Yingsong, Ding Yansheng

Strategic Study of CAE 2010, Volume 12, Issue 9, Pages 52-57

Abstract:

In this paper,the technical idea and the possible applications of this method were briefly introduced. Meanwhile, some related key technical problems were also particularly discussed. A series of research and corresponding advances achieved in recent years were reported in detail. In the end, some suggestion was made for further research.

Keywords： low permeability reservoirs mechanics of explosion explosion in fractures security simulation experiment

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Hongshiyan Landslide Dam Danger Removal and Coordinated Management

Ning Liu

Frontiers of Engineering Management 2014, Volume 1, Issue 3, Pages 308-317 doi: 10.15302/J-FEM-2014041

Abstract: This paper takes an overview of the Hongshiyan landslide dam triggered by an earthquake near Ludian County

Keywords： the Zhaotong Ludian earthquake danger removal of the landslide dam coordinated management

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Research on key construction technologies of concrete dam heightening project

Zhou Hougui

Strategic Study of CAE 2012, Volume 14, Issue 7, Pages 87-92

Abstract:

Based on construction practice of worldwide concrete dam heightening project, 4 key construction technologiesof concrete gravity dam heightening project by the integral heightening mode on the existing dam bythe down stream side and on the dam crest were systematically summarized.

Keywords： construction technology dam heightening concrete dam hydraulic and hydropower engineering

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Challenges of high dam construction to computational mechanics

ZHANG Chuhan

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 1, Pages 12-33 doi: 10.1007/s11709-007-0002-6

Abstract: The current situations and growing prospects of China s hydro-power development and high dam constructionThese include but are not limited to: stress and stability analysis of dam foundations under externalloads; earthquake behavior of dam-foundation-reservoir systems, mechanical properties of mass concreteSome examples demonstrating successful utilizations of computational mechanics in high dam engineeringof arch dams under reservoir loads, and failure analysis of arch dam-foundations.

Keywords： reservoir engineering hydro-power development state-of-the-art computational earthquake