An Innovative Pile Guide Wall for the Emden Sea-Lock

Ports '01 ◽  
2001 ◽  
Author(s):  
Hans-Dieter Clasmeier ◽  
Robert L. Beach
Keyword(s):  
Guide Wall

Construction Techniques of Deep Diaphragm Wall in the Yellow River-Crossing Project in South-to-North Water Transfer

2011 ◽  
Vol 250-253 ◽  
pp. 1212-1216
Author(s):  
Da Hu Rui ◽  
Qing Hong Wu ◽  
Zhen Feng Cao ◽  
Yu Xia Zhao ◽  
Guang Fan Li
Keyword(s):  
Yellow River ◽  
Water Transfer ◽  
Diaphragm Wall ◽  
Shield Tunnel ◽  
Medium Sand ◽  
Construction Techniques ◽  
Geological Conditions ◽  
North Bank ◽  
Guide Wall ◽  
North Water

Yellow River-Crossing Project in South-to-North Water Transfer approach through the use of shield tunnel and its north bank departure shaft adopts diaphragm wall as enclosure structure. The depth of continuous wall of its shielding starting shaft is 76.6m, which is the deepest at present in china. The continuous diaphragm wall travels through the layer of silver sand, medium sand and loam from top to bottom, where the geological conditions are poor with large difficulty of construction. This paper sets forth construction of guide wall, reinforcing measures before construction, Trenching process, groove segment connections, innovative technologies of uplifting huge reinforcing cage and so on, which will provide guidance and lessons for the similar project

Study on Hydraulic Characteristics and Optimization of Siphon Channel with Two Inlets in Drydock

2014 ◽  
Vol 638-640 ◽  
pp. 1285-1292
Author(s):  
Peng Zhao ◽  
Yu Chuan Bai
Keyword(s):  
Energy Dissipation ◽  
Numerical Model ◽  
Kinetic Energy ◽  
Dissipation Rate ◽  
Three Dimensional ◽  
Flow State ◽  
Hydraulic Characteristics ◽  
Channel System ◽  
Guide Wall ◽  
Low Efficiency

Compared with the siphon channel with one inlet, the siphon channel with two inlets has some problems such as low efficiency of flooding. Combining with the model test of siphon channel with two inlets in a drydock, three-dimensional numerical model was built to study the hydraulic characteristics of siphon channel system. The reliability of numerical model was confirmed by comparing the calculated value and measured value of hump pressure and flooding rate. Results of turbulent kinetic energy and dissipation rate indicate that flow kinetic energy is mainly dissipated by the friction and its impacting the wall behind partition and the effect of energy dissipation pillars are not obvious. By comparing flow state in front of energy dissipation section and flooding rate between design scheme and modified scheme, it is suggested that the guide wall should be dismantled to ameliorate flow state.

Experimental Research on Structure of Surface Orifice Flood Discharge and Energy Dissipation of Hydropower Station with Large Discharge

2012 ◽  
Vol 212-213 ◽  
pp. 1048-1056
Author(s):  
Jing Li ◽  
Bo Le Jiang
Keyword(s):  
Energy Dissipation ◽  
Hydropower Station ◽  
Design Flood ◽  
Structure Pattern ◽  
Flow Energy ◽  
Flood Discharge ◽  
Guide Wall ◽  
Energy Dissipation Capacity ◽  
Large Discharge ◽  
Structure Layout

Normally, it is much complicated and difficult to design flood discharge and energy dissipation with large discharge. In this paper, twelve designed schemes of a curtain hydropower station were compared and analyzed repeatedly. It provides better reference scheme for engineering design. On weir surface and middle orifice local hydraulic model with geometry scale of 1:60, the writer tested and researched on energy dissipation capacity ,velocity and flow pattern, pressure distribution and related hydraulics problems of the curtain hydropower station discharging structure layout. Basically practicable discharging structure pattern and stilling pool pattern were put forward, through comparison and optimization of more than ten schemes. The study result showed that the surface orifice adapting proper pattern of flaring gate pier was favorable to increase the energy dissipation efficiency and shorten the length of stilling pool, but had no effect on the phenomenon of water wing hitting both sides of guide wall caused by flaring gate pier, the schemes of canceling flaring gate pier of surface orifice and adapting the declined pattern stilling pool could decrease the stilling pool floor plate velocity of under flow energy dissipation efficiently ,at the same time diminish the phenomenon of water wing hitting guide wall on both sides caused by flaring gate pier and obtain certain satisfying energy dissipation effect, moreover it had much heuristic and inspirational effect on similar projects.

Effect of a Cylindrical Cavity on the Performance of Cross-flow Turbine with a Guide Wall

2020 ◽  
Vol 2020.57 (0) ◽  
pp. K025
Author(s):  
Naoto OGAWA ◽  
Mirei GOTO ◽  
Sho KAMODA ◽  
Shouichiro IIO ◽  
Takaya KITAHORA ◽  
...  
Keyword(s):  
Cylindrical Cavity ◽  
Cross Flow ◽  
Guide Wall

Stability Evaluation for Cut-Off Wall of Daning Reservoir during Operation Period

2012 ◽  
Vol 212-213 ◽  
pp. 835-840
Author(s):  
Miao Liu ◽  
Zhi Yin Wang ◽  
Qi Wei Zhang ◽  
Jing Chun Li
Keyword(s):  
Water Level ◽  
Horizontal Displacement ◽  
Good Effect ◽  
Concrete Wall ◽  
The Maximum Principle ◽  
Vehicle Load ◽  
Fluid Load ◽  
Guide Wall ◽  
Reinforced Concrete Wall ◽  
Stress And Deformation

The stress and deformation of cut-off wall will be changed as the water level cyclical varying during reservoir's operation. Therefore, the prediction is important to the safety and stability of reservoir. In this paper, the seepage characteristics of the highest and the lowest water level condition have been predicted, and the variation of horizontal displacement is discussed under the vehicle load of road and cyclical fluid load. Meanwhile, the displacement distribution and stress state in junction area of the upper wall and the lower wall are obtained. The results show that the Cut-off wall is less affected by the vehicle load of road, and its stress and deformation will gradually stabilize after the second water store-discharge cycle. The upper reinforced concrete wall will tilt towards outside of reservoir, but the deformation is very small at lower plastic concrete wall. The guide wall has a good effect on preventing the upper wall's inclining and improving the lower wall's stress environment. Besides, the maximum principle stress of cut-off wall is too small to course plastic failure.

Experimental study on improvement effect of guide wall to water flow in bend of spillway chute

2015 ◽  
Vol 73 (3) ◽  
pp. 669-678 ◽  
Author(s):  
Qinghua Zhang ◽  
Yanfang Diao ◽  
Xingtao Zhai ◽  
Shuning Li
Keyword(s):  
Water Flow ◽  
Cross Section ◽  
Cross Sections ◽  
Water Surface ◽  
Great Influence ◽  
Flow Rates ◽  
Improvement Effect ◽  
Guide Wall ◽  
The Cross ◽  
Surface Improvement

In order to improve water flow in a bend of a spillway chute using a guide wall, modeling experiments with or without a guide wall under conditions of three different bend axial radii, three chute bottom slopes and three flow rates were carried out in this study. Two indexes were calculated, which are the improved water surface uniformity and the reduced rate of water surface difference in concave and convex banks of the cross-section. The results show that: (1) setting a guide wall in a bend can improve water flow in the bend because it increased the water surface uniformity of the cross-section and reduced the water surface difference in the concave and convex banks; (2) the smaller the bend axial radius, the better the water surface improvement effect will be using a guide wall; (3) the steeper the bottom slope, the more cross-sections with less water surface difference; and (4) flow rates have a great influence on water surface improvement in the bend, and the guide wall can improve water flow obviously when the water depth in the starting section of the bend is lower than the height of the guide wall. This study has important implications in engineering design of guide walls.

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