Preloading thick compressible subsoils: a case history

1995 ◽  
Vol 32 (3) ◽  
pp. 465-480
Author(s):  
Charles F. Ripley
Keyword(s):  
Key Words ◽  
Case History ◽  
Construction Control ◽  
History Of ◽  
Settlement Analysis ◽  
Settlement Behaviour

A case history of preloading and surcharging a more than 300 ft (1 ft = 0.3048 m) thick compressible subsoil is presented, with data on the settlement analysis, the fill design, other measures used for control of settlements, and the 24 year postconstruction performance. The essential factors for successful application of preloading to thick compressible subsoils are discussed. Key words : preloading, settlement analysis, construction control, settlement behaviour.

Movement and stability analysis of the Beaver Creek landslide, Saskatchewan, Canada

1985 ◽  
Vol 22 (3) ◽  
pp. 277-285 ◽  
Author(s):  
R. T. Yoshida ◽  
J. Krahn
Keyword(s):  
Stability Analysis ◽  
Key Words ◽  
Residual Strength ◽  
Case History ◽  
Single Unit ◽  
Slip Surface ◽  
Friction Angle ◽  
Slide Mass ◽  
History Of ◽  
Residual Values

This paper presents a case history of a multiblock landslide where the blocks move at varying rates along a common horizontal slip surface which follows the contact between stratified drift and underlying till. Movement measurements indicate that the blocks towards the toe move at a higher rate than blocks towards the scarp. Stability analyses show that the entire slide mass can be analyzed as a single unit as opposed to considering each block separately. This finding is compared with the analysis of other multiblock slides. The friction angle mobilized along the horizontal slip surface falls within the range of residual values measured in the laboratory. Key words: landslides, stability, analysis, translational slides, residual strength.

Thirteenth Bjerrum Memorial Lecture: A case history of mysterious settlements in a building

1992 ◽  
Vol 29 (1) ◽  
pp. 1-10
Author(s):  
J. M. Duncan
Keyword(s):  
Key Words ◽  
San Francisco ◽  
Case History ◽  
Memorial Lecture ◽  
Pile Driving ◽  
Technical Aspects ◽  
History Of ◽  
The One

This lecture describes the investigation of large and damaging settlements in the One Lombard Building in San Francisco Calif. The cause of the settlements was a mystery. Although it was known that settlement began during construction of a major new sewer near the building, it was not clear how the settlements could be related to the sewer construction activities. The paper explains the cause of the settlements and describes the technique used to remedy the problem. The legal and insurance aspects of the case, in some ways more mysterious than the technical aspects, are also described. Key words : settlement, foundations, clay, dewatering, pile driving, underpinning.

Settlement record of tower silos built on Champlain clays

1987 ◽  
Vol 24 (4) ◽  
pp. 490-498 ◽  
Author(s):  
J. P. Morin ◽  
R. Gervais
Keyword(s):  
Key Words ◽  
Case History ◽  
Laboratory Testing ◽  
Factor Of Safety ◽  
Shear Testing ◽  
Foundation Design ◽  
Design Recommendations ◽  
Original Group ◽  
Settlement Behaviour

Research has been carried out at Université de Sherbrooke since 1975 on the behaviour of agricultural tower silos built in the St. Lawrence Lowlands in the Province of Quebec. The structures considered are built over soft sensitive Champlain Sea clays. The current foundation designs usually rely heavily on qualitative estimations of the performance of previously built silos. Settlement surveys are now available for a 10 year period for 19 silos out of an original group of 28. Sampling and laboratory testing have been carried out at 11 of these locations, while Nilcon vane shear testing has been performed at each site. Settlement and stability calculations have been made. It is thus possible to compare the observed and predicted behaviours of each silo over a substantial period of time. Foundation design recommendations are proposed as a result of these observations. It is shown that the factor of safety against failure can be used as an indicator of settlement behaviour. Key words: case history, settlement, sensitive clays, tower silos.

scholarly journals The ecology of herd immunity

2021 ◽  
Vol 50 (2) ◽  
pp. 79-85
Author(s):  
Fernando Dias de Avila-Pires
Keyword(s):  
Key Words ◽  
Case History ◽  
Herd Immunity ◽  
Sleeping Sickness ◽  
Short History ◽  
Herd Effect ◽  
History Of ◽  
The Subject ◽  
Recurrent Theme

The COVID-19 pandemic that began in early 2020 is currently the subject of thousands of articles on the various aspects of its epidemiology. One recurrent theme is the phenomenon of herd immunity or herd effect. In this article, I present a short history of the concept, the arguments around its nomenclature, and the ecologist’s view of the herd effect, using the case history of the sleeping sickness control in Africa. KEY WORDS: Herd immunity; convergence; ecology; sleeping sickness.

Unlocking Reserves, Fracturing Tight Gas-Condensate Bearing Sandstone: The Case History of a North African Field (Algeria)

2013 ◽  
Author(s):  
Lucio Bertoldi ◽  
Raffaele Perfetto ◽  
Francesca Rinaldi ◽  
Gabriele Carpineta ◽  
Luis Granado ◽  
...  
Keyword(s):  
Case History ◽  
Gas Condensate ◽  
Tight Gas ◽  
North African ◽  
History Of

Deep Workover Challenges of an HP/HT Sour Gas Well - Case History of Mutriba 12

2011 ◽  
Author(s):  
Mohammed Jasem Al-Saeedi ◽  
Fayez Abdulrahman Al Fayez ◽  
Dakhil Rasheed Al Enezi ◽  
mahesh sounderrajan ◽  
Mishary Najeeb Al-Mudhaf ◽  
...  
Keyword(s):  
Case History ◽  
Gas Well ◽  
History Of ◽  
Sour Gas
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