A physical model study of ice passage at the Soo Locks

2000 ◽  
Vol 27 (6) ◽  
pp. 1207-1216
Author(s):  
Andrew M Tuthill
Keyword(s):  
Point Source ◽  
Great Lakes ◽  
Physical Model ◽  
Model Tests ◽  
High Flow ◽  
Air Curtain ◽  
Ice Jams ◽  
Model Study ◽  
Lock In ◽  
Model Water

A physical model study investigated alternatives to improve ice passage at the Soo Locks in Sault Ste. Marie, Michigan. This paper describes the ice problems at the Soo Locks and the solutions developed in the study. Model tests were conducted to evaluate the performance of high-flow air curtains to deflect ice pushed ahead of vessels entering the 366-m-long Poe Lock. A series of air curtains and an array of point source bubblers were also tested to break ice jams in the upper approach of the adjacent MacArthur Lock. In addition, an array of high-flow point source bubblers was developed in the model to relieve ice congestion in front of the downstream miter gates of the Poe Lock. A model water cannon was also found effective for clearing ice in front of miter gates and breaking jams in the upper lock approach.Key words: Soo Locks, physical model study, ice passage, winter navigation, Great Lakes, high-flow air curtain, point source bubbler, miter gate, water cannon.

scholarly journals PHYSICAL MODELING STUDY ON SCOUR AND SCOUR COUNTERMEASURE FOR SEA-CROSSING BRIDGE PIERS

2012 ◽  
Vol 1 (33) ◽  
pp. 83
Author(s):  
Hsin Hung Chen ◽  
Ray-Yeng Yang ◽  
Ping-Chiao Kuo ◽  
Hwung-Hweng Hwung
Keyword(s):  
Physical Model ◽  
Model Tests ◽  
Bridge Piers ◽  
Test Series ◽  
Model Study ◽  
Sea Bed ◽  
Wave Basin ◽  
Scour Protection ◽  
Hydraulics Laboratory ◽  
Scour Countermeasure

There are significant engineering challenges in placing the sea-crossing bridge piers in more or les shallow coastal waters because, as well as having to withstand storm-force waves and tidal currents, the bridge piers have to remain stable on a sea bed that may be continuously changing. One of the major challenges faced by designers is how to predict, and prevent, scour of the seabed sediments around the sea-crossing bridge piers. This paper describes a physical model study on scour and scour countermeasure for sea-crossing bridge piers. A 1:49 scale movable bed model tests were carried out in the Near-shore Wave Basin (NSWB, 27m x 19m) at the Tainan Hydraulics Laboratory, National Chang Kung University (NCKU), Tainan, Taiwan, with the sea-crossing bridge piers in the test area. Three series of physical model tests were performed in this study. The aim of the first test series is to investigate the maximum scour depth for the initial construction of bridge piers with only one pier model. Then the second test series were conducted to investigate the greatest magnitude of local scour and potential scour area in the sand bed around the sea-crossing bridge group piers with no scour protection. Based on the analysis from the former NSWB experimental results, the suitable scour countermeasure for sea-crossing bridge piers would be proposed and validated its function of preventing scour in the third test series.

Three Dimensional Physical Model Study on Penang Fishing Port Project

2014 ◽  
Vol 580-583 ◽  
pp. 2198-2201
Author(s):  
Ci Heng Zhang ◽  
Bao Lei Geng
Keyword(s):  
Physical Model ◽  
Incident Wave ◽  
Three Dimensional ◽  
Model Tests ◽  
Test Results ◽  
Model Study ◽  
Wave Basin ◽  
Wave Generator ◽  
Wave Distribution ◽  
Directional Wave

A three-dimensional physical model was used to study the wave distribution around breakwater in Malaysia Penang. Model tests were carried out by using the L-type action absorption directional wave generator in a 45m×40m wave basin at TIWTE in Tianjin China. The incident wave conditions were checked first in the laboratory and a series steps were introduced to construct the bathymetry and breakwater structure. By comparing the test results, the improved top elevation of breakwater is +4.5m, and the recommendation length of northern part of breakwater is 65m.

scholarly journals Two-Dimensional Numerical Modeling of Flow in Physical Models of Rock Vane and Bendway Weir Configurations

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 458
Author(s):  
Drew C. Baird ◽  
Benjamin Abban ◽  
S. Michael Scurlock ◽  
Steven B. Abt ◽  
Christopher I. Thornton
Keyword(s):  
Numerical Modeling ◽  
Physical Model ◽  
Numerical Models ◽  
Hydraulic Performance ◽  
Physical Models ◽  
Protection Measures ◽  
Design Engineers ◽  
Model Study ◽  
Study Results ◽  
Wide Range

While there are a wide range of design recommendations for using rock vanes and bendway weirs as streambank protection measures, no comprehensive, standard approach is currently available for design engineers to evaluate their hydraulic performance before construction. This study investigates using 2D numerical modeling as an option for predicting the hydraulic performance of rock vane and bendway weir structure designs for streambank protection. We used the Sedimentation and River Hydraulics (SRH)-2D depth-averaged numerical model to simulate flows around rock vane and bendway weir installations that were previously examined as part of a physical model study and that had water surface elevation and velocity observations. Overall, SRH-2D predicted the same general flow patterns as the physical model, but over- and underpredicted the flow velocity in some areas. These over- and underpredictions could be primarily attributed to the assumption of negligible vertical velocities. Nonetheless, the point differences between the predicted and observed velocities generally ranged from 15 to 25%, with some exceptions. The results showed that 2D numerical models could provide adequate insight into the hydraulic performance of rock vanes and bendway weirs. Accordingly, design guidance and implications of the study results are presented for design engineers.

Canal Wave Oscillations from Expansion of I-84 Bridge in Boise, Idaho

2012 ◽  
Vol 2309 (1) ◽  
pp. 200-205
Author(s):  
William Rahmeyer ◽  
J. M. Clegg ◽  
S. L. Barfuss
Keyword(s):  
New York ◽  
Physical Model ◽  
Unique Solution ◽  
Wave Phenomenon ◽  
Bridge Columns ◽  
Bridge Abutments ◽  
Wave Problem ◽  
Model Study ◽  
Bridge Crossing

Recent improvements and the widening of the I-84 Bridge crossing of the New York Canal in Boise, Idaho, have increased the number of bridge columns from 28 to 60. The resulting structure has two parallel rows of columns that extend across the width of the bridge longitudinally within the canal. After the widening of the bridge and addition of the bridge columns, the canal began experiencing an oscillating wave phenomenon that originated from the bridge columns and caused erosion of upstream and downstream canal banks and bridge abutments. A physical model study was conducted to investigate the wave phenomenon and determine what modifications to the columns or canal would be necessary to prevent the wave oscillations. The physical model was successful in simulating the wave phenomenon, and four different modifications for resolving the wave problem were tested in the model. A unique solution was found that used precast nose cones attached to selected columns. The nose cones have been installed in the prototype bridge crossing, and no wave oscillations have occurred since installation. This paper discusses the study to simulate the wave phenomenon and the four modifications that were evaluated to reduce or prevent wave oscillations.

scholarly journals Physical model study of beach profile evolution by sea level rise in the presence of seawalls

2018 ◽  
Vol 136 ◽  
pp. 172-182 ◽  
Author(s):  
T. Beuzen ◽  
I.L. Turner ◽  
C.E. Blenkinsopp ◽  
A. Atkinson ◽  
F. Flocard ◽  
...  
Keyword(s):  
Sea Level Rise ◽  
Physical Model ◽  
Sea Level ◽  
Beach Profile ◽  
Model Study

Section model tests on human – structure lock-in

2003 ◽  
Vol 156 (2) ◽  
pp. 71-79 ◽  
Author(s):  
A. McRobie ◽  
G. Morgenthal ◽  
J. Lasenby ◽  
M. Ringer
Keyword(s):  
Model Tests ◽  
Section Model ◽  
Lock In

A physical model study of the storage of low-grade heat in unsaturated chalk

1982 ◽  
Vol 56 (1-2) ◽  
pp. 61-83 ◽  
Author(s):  
John B.W. Day ◽  
J.H. Black ◽  
N.A. Chapman ◽  
D.H. Hall
Keyword(s):  
Physical Model ◽  
Low Grade ◽  
Model Study ◽  
Low Grade Heat
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