Stability of an undermined quay wall in Port Elizabeth

2016 ◽  
pp. 341-346
Author(s):  
G Wojtowitz ◽  
J Beyers
Keyword(s):  
Quay Wall ◽  
Port Elizabeth

scholarly journals Numerical modeling of seismic performance of gravity quay wall

2021 ◽  
Vol 1058 (1) ◽  
pp. 012038
Author(s):  
Alaa N. Aldelfee ◽  
Asad H. Aldefae ◽  
Salah. L. Zubaidi
Keyword(s):  
Numerical Modeling ◽  
Seismic Performance ◽  
Quay Wall

III. An experimental determination of the velocity of sound

1872 ◽  
Vol 20 (130-138) ◽  
pp. 34-35
Keyword(s):  
Experimental Determination ◽  
Cape Town ◽  
The Other ◽  
Velocity Of Sound ◽  
Successful Operation ◽  
Single Wire ◽  
Galvanic Current ◽  
Royal Observatory ◽  
Port Elizabeth

A galvanic current passes from the batteries at the Royal Observatory, Cape Town, at 1 o’clock, and discharges a gun at the Castle, and through relays drops a time-ball at Port Elizabeth. It appeared to the author that a valuable determination of the velocity of sound might be obtained by measuring upon the chronograph of the Observatory the interval between the time of the sound reaching some point near the gun and that of its arrival at the Observatory. As there is only a single wire between the Observatory and Cape Town, some little difficulty was experienced in making the necessary arrangements, without any interference with the 1 o’clock current to Port Elizabeth; but this difficulty was overcome by a plan which the author describes, and which was brought into successful operation on Feb. 27, 1871. The experiments could not have been carried out, on account of the encroachment they would have made on the time of the Observatory staff, had it not been for the assistance of J. Den, Esq., the acting manager of the Cape Telegraph Company, to whom the author is indebted for the preparation of a good earth-connexion near the gun, for permission to Mr. Kirby, a gentleman attached to the telegraph office, to assist in the experiments, and for a general superintendence of the arrangements at Cape Town. The observed times of hearing the sound were recorded on the chronograph by two observers, situated one (Mr. Kirby) at a distance of 641 feet from the gun, the other (Mr. Mann) at the Observatory, at a distance of 15,449 feet from the gun. The former distance was sufficient to allow the connexion of the main wire to be broken at the telegraph office after the gun had been fired, but before the sound reached the first observer.

Prediction method of seismic residual deformation of caisson quay wall in liquefied foundation

2011 ◽  
Vol 25 (1) ◽  
pp. 45-58 ◽  
Author(s):  
Li-yan Wang ◽  
Han-long Liu ◽  
Peng-ming Jiang ◽  
Xiang-xiang Chen
Keyword(s):  
Residual Deformation ◽  
Prediction Method ◽  
Quay Wall

Discussion of “Failure of Quay Wall at Mare Island, California”

1949 ◽  
Vol 114 (1) ◽  
pp. 507-523
Author(s):  
Ralph B. Peck ◽  
Howard C. Roberts ◽  
Armand Mayer ◽  
S. Packshaw ◽  
J. Owen Lake ◽  
...  
Keyword(s):  
Quay Wall
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