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Liquefaction Assessment in Golem Area, Albania, by Means of In-situ tests

Journal of Civil Engineering and Architecture 2015年第5期9卷 547-553页

作者： Shpresa Gashi Neritan Shkodrani Department of Civil Engineering Faculty of Civil Engineering Polytechnic of Tirana Tiran 1000 Albania

The liquefaction is a very significant phenomenon in clayey silty soils, silty sands and also sands. The high potential of liquefaction is generally recognized when these types of soils are laid under the hydrostatic water table. Low plasticity silts, silty sands and sands are found as recent alluvial deposits in the western coastal part of Albania, especially in the sandy beaches of Adriatic Sea near Durres City. The aim of this study is to evaluate the soil liquefaction potential in the area of Golem. Ten CPTUs （cone penetration test with pore pressure measurements） are carried out for the site investigation of soils. In this paper, results of the CPTU based liquefaction analysis are presented. The data of two CPTUs （10 in total） are analyzed and factor of safety was found by considering different levels of hazard and ground water. The results of liquefaction potential analysis show that the soils in the area of Golem have a high risk of liquefaction.

关键词： cone penetration test liquefaction potential cyclic resistance ratio cyclic stress ratio safety factor.

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IMPROVEMENT IN THE MECHANICAL PROPERTIES OF COHESIVE SOILS BY MIXING CARBIDE POSSESSING WATER ABSORPTION PROPERTY

IMPROVEMENT IN THE MECHANICAL PROPERTIES OF COHESIVE SOILS B...

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中日岩土工程学术会议

作者： KIYOSHI OMINE HIDETOSHI OCHIAI NORIYUKI YASUFUKU TAIZO KOBAYASHI KEIICHIROU KUROKI MASUHITO SHIOZAK Associate Professor Department of Civil EngineeringKyushu University6-10-1 HakozakiHigashi-kuFukuoka 812-8581Japan Associate Professor Department of Civil Engineering Kyushu University 6-10-1 Hakozaki Higashi-ku Fukuoka 812-8581 Japan Deputy manager Kurimoto Ltd. Kyushu BrachHakata-kuFukuokaJapan

＜正＞ In order to improve the mechanical properties of volcanic cohesive soils, they are usually stabilized by adding cement or lime. However, this method has certain drawbacks such as insufficient hardening or the leaching of hexavalent chromium from cement. Each year, a large amount of mown grass is generated from embankments and river areas. Most of this grass is either burnt in a field or disposed, while a part of it is used in composting. A technique for the carbonization of mown grass has been developed. Carbide is a porous material with a high capacity for water absorption. Therefore, the mown grass carbide can be used for water purification and soil improvement. In this study, the strength and leaching properties of cement-treated soils mixed with charcoal are investigated by performing unconfined compression and by conducting leaching tests. Furthermore, a cone penetration test is performed on the volcanic cohesive soils using the carbide obtained from mown grass, and the improvement in trafficability by mixing carbide and lime is clarified.

关键词： Volcanic Cohesive Soils Carbide cone penetration test Trafficability

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