A Soil improvement case study using rammed stone column systems

Download
2013
Beşler, Osman Fatih
Nowadays, the rammed stone columns and similar systems are used worldwide more and more frequently as an economical way for improvement of the foundation soils. The primary objective of this study is to evaluate the effectiveness of the rammed stone column system by predicting settlements and bearing capacity increase through evaluation of failure mechanisms of reinforced soil layers loaded in compression. Conventional approaches of design are compared with the results of finite element models using software PLAXIS 3D and field load test. Field and laboratory tests are are carried out to determine the attributes of the in-situ foundation soils . It is found that the predictive capability of available methods for the evaluation of bearing capacity of the reinforced soil fits well with that derived from field load tests, in general. Response of a single loaded column and group of loaded columns don’t show significan differences. On the other hand, regarding elastic settlements some differences were observed between the field test results and those calculated from the finite element model, as well as those estimated by the existing formulations. Potential reasons for those differences are discussed in this thesis.

Suggestions

An Experimental study on the treatment of expansive soils by granular materials
Hergül, Timuçin; Çokça, Erdal; Department of Civil Engineering (2012)
Expansive soils are a worldwide problem that possesses various challenges for civil engineers. With increasing water content, they exhibit excessive volume changes, resulting in large horizontal and vertical stresses to the structures located or buried in these regions. The most common method to minimize this effect is to replace these types of clays around the proposed structure with nonexpansive soils. For the cases needing larger volume of replacement, either sidewalls or the foundations must be designed...
A Rock Mechanics Investigation for the Stability of an Underground Ore Storage Chamber
Karpuz, Celal (1982-05-26)
In this paper, rock mechanics investigations carried out on the future behaviour and support requirements of a large cavern planned to be utilized as a chamber for ore storage which is under early stages of its construction are presented. This cavern which is to be excavated in weak granodiorite and scarp, will have the dimensions of 15 m width, 40 m height, and 60 m length when completed. To reach the goal, rock mechanical parameters have been extensively studied. In this respect, major geological patterns...
A laboratory study of anisotropy in engineering properties of Ankara clay
İspir, Mustafa Erdem; Ergun, Mehmet Ufuk; Department of Civil Engineering (2011)
Anisotropy in engineering properties of soils occurs due to the depositional process forming the soil fabric and/or different directional stresses in soil history. This study investigates the anisotropy in undrained shear strength and drained compressibility of preconsolidated, stiff and fissured Ankara Clay. The compressibility behavior is determined using standard oedometer testing while the shear strength anisotropy is investigated through large diameter unconsolidated-undrained triaxial testing on undis...
Prediction of swelling behavior of expansive soils using modified free swell index, methylene blue and swell oedometer tests
Jaleh Forouzan, Amir; Çokça, Erdal; Department of Civil Engineering (2016)
Expansive soils are recognized as problematic soils that impose several challenges for civil engineers. Such soils undergo significant volume change in case water penetrates into them, and they shrink as they lose moisture. Lightly-loaded engineering structures such as pavements, single story buildings, railways and walkways may experience severe damages when they are founded on such soils. Determination of expansive soils and quantifying their swelling potential and pressure caused by their expansion are e...
Identifying Masonry Buildings That Are under High Seismic Risk
Aldemir, Alper; Binici, Barış; Yakut, Ahmet; Canbay, Erdem (2015-11-06)
Masonry has been one of the most popular construction materials for centuries as it provided economical solutions for sheltering problems worldwide. Turkey, as a country with significant portion of its land in seismic zones, has a masonry building stock in the order of millions, most of which built in the twentieth century. In addition to the complications associated with anisotropic and composite nature of masonry buildings, the accurate estimation of seismic demands with simple yet accurate analytical too...
Citation Formats
O. F. Beşler, “A Soil improvement case study using rammed stone column systems,” M.S. - Master of Science, Middle East Technical University, 2013.