A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Utilizing PVDs to Provide Shear Strength to Saturated Fine-Grained Foundation Soils
Abstract This paper describes a major case history failure of 300,000 m3 of soft foundation soil (while being surcharged) that used sand drains to shorten the consolidation time. It occurred in 1960 and has never been reported in the open literature. Using data from this case history a computer analysis is used illustrating the situation and concerns involved. With the advent of prefabricated vertical drains, the hypothetical installation of PVDs is counterpointed to this same sand drain case history showing how factors-of-safety are increased. Used are laboratory generated tensile strengths of commercial PVDs at various angles using a special apparatus developed for the first time and reported herein. The factors-of-safety against the actual case history foundation soil failure increases by approximately 4% using commercially available PVDs at typical spacings. Using stronger PVDs and/or closer spacings there is no limit as to potential increases in factors-of-safety. To the authors knowledge this is the first time that PVDs used for site drainage have been considered as reinforcement materials insofar as foundation soil stability is concerned. We hope that further advances can be made in this regard.
Utilizing PVDs to Provide Shear Strength to Saturated Fine-Grained Foundation Soils
Abstract This paper describes a major case history failure of 300,000 m3 of soft foundation soil (while being surcharged) that used sand drains to shorten the consolidation time. It occurred in 1960 and has never been reported in the open literature. Using data from this case history a computer analysis is used illustrating the situation and concerns involved. With the advent of prefabricated vertical drains, the hypothetical installation of PVDs is counterpointed to this same sand drain case history showing how factors-of-safety are increased. Used are laboratory generated tensile strengths of commercial PVDs at various angles using a special apparatus developed for the first time and reported herein. The factors-of-safety against the actual case history foundation soil failure increases by approximately 4% using commercially available PVDs at typical spacings. Using stronger PVDs and/or closer spacings there is no limit as to potential increases in factors-of-safety. To the authors knowledge this is the first time that PVDs used for site drainage have been considered as reinforcement materials insofar as foundation soil stability is concerned. We hope that further advances can be made in this regard.
Utilizing PVDs to Provide Shear Strength to Saturated Fine-Grained Foundation Soils
Koerner, Robert M. (author) / Koerner, Maxwell R. (author) / Koerner, George R. (author)
2017-09-27
12 pages
Article (Journal)
Electronic Resource
English
Shear Strength of Fine-Grained Soils
NTIS | 1973
Shear strength of fine grained soils : 6 reports
| TIBKAT | 1973
Microstructure of Partly Saturated Fine Grained Soils
| British Library Conference Proceedings | 1995