An experimental study on the additional settlement of footing resting on granular soils by water table rise

Morgan, Blain A., Shukla, Sanjay K., and Sivakugan, Nagaratnam (2010) An experimental study on the additional settlement of footing resting on granular soils by water table rise. Soils and Foundations, 50 (2). pp. 319-324.

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Abstract

When the water table rises in a granular soil mass, a large additional settlement of footing resting on such a soil mass is commonly expected. Laboratory model tests show that when the water table rises to the footing level, there can be an additional 400 to 500% of the settlements compared to when the soil is dry. To understand the mechanics of the additional settlements of footings resting on the granular soil masses caused by water table rise, an investigation into the change in the Young's modulus of soil was therefore made using oedometer tests. A relation between the saturated and the dry Young's moduli of the granular soils is presented for use in the elastic analysis of footing settlements. The findings of the investigation were then used to predict the additional settlements of a model footing when subjected to a water table rise, using elastic analysis. The theoretical predictions of the additional settlements are lower than the actual additional settlements observed in the settlement tests conducted in the laboratory using model tests. The model tests show that the additional settlements are larger in loose sands than in dense sands.

Item ID: 11951
Item Type: Article (Refereed Research - C1)
Keywords: footing, granular soil, settlement, water table rise, Young's modulus
ISSN: 1881-1418
Date Deposited: 06 Dec 2010 02:39
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering @ 100%
SEO Codes: 87 CONSTRUCTION > 8702 Construction Design > 870201 Civil Construction Design @ 100%
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