Master's Dissertation at the Div. of Structural Mechanics · 2008-12-19 · Presentation Winter...
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Master's Dissertation at the Div. of Structural Mechanics Div. of Structural Mechanics · Lund University · Box 118 · SE-221 00 · Lund · Sweden · Tel: 046-222 73 70 · Fax: 046-222 44 20 · www.byggmek.lth.se · xp5161(0807) Bahatin Gündüz Presentation Winter 2008 Report will be published as report TVSM-5161 Supervisors Lars Johansson Ramböll Sverige AB, Malmö Ola Dahlblom, Prof. Div. of Structural Mechanics, Lund ANALYSIS OF SETTLEMENTS OF TEST EMBANKMENTS DURING 50 YEARS - A Comparison between Field Measurements and Numerical Analysis For a little more than 50 years, the Swedish Geotechnical Institute (SGI) has had test embankments at different locations in Sweden. The aim with the test embankments has been to follow up settlements by field measurements in order to improve both the general knowledge and calculation methods. The purpose of this Master Thesis is that settlements will be calculated by numerical methods by use of the finite element program PLAXIS and compare the calculated result with field measurements. The main objective is to create a numerical model which describes the current field situation as realistic as possible. The compared objects in this work will be test embankments at Lilla Mellösa and Skå-Edeby, located in Stockholm. At Lilla Mellösa two test fills were constructed by SGI in 1945 – 1947 while at Skå-Edeby four test fills were constructed in 1957. The background to the building of test fills was the search of a place for a new international airport outside Stockholm. The soil condition in both areas consisted of very com- pressible soil layers with large thickness. The two-dimensional version of Plaxis will be used for computing settlements. Plaxis is very practical for solving complex geotechnical problems involving settlement or slope stability. Those elements are then connected by nodes. The stress and tension in every element can later be calculated. The work will be carried out in several steps. The first part of the work will be a literature study in order to find relevant information on the topic. One important phase of this step is to identify previous work adopting the same or a similar method. Analyses will be carried out for embankments placed on different soil layer profiles. Different methodologies will be adopted, i.e. separation between the mechanical and the pore water phase, and incorporation of both at the same time (consolidation), respectively. Also different soil models can be adopted in order to describe the soil behaviour as correctly as possible. A raw presentation of the results without any interpretations or judgements will be given. Examiner Per Johan Gustafsson, Prof. Div. of Structural Mechanics, Lund In cooperation with Ramböll Sverige AB The work is performed at Ramböll Sverige AB, Malmö
Transcript of Master's Dissertation at the Div. of Structural Mechanics · 2008-12-19 · Presentation Winter...
Master's Dissertation at the Div. of Structural Mechanics
Div. of Structural Mechanics · Lund University · Box 118 · SE-221 00 · Lund · Sweden · Tel: 046-222 73 70 · Fax: 046-222 44 20 · www.byggmek.lth.se · xp5161(0807)
Bahatin Gündüz
PresentationWinter 2008
Reportwill be published asreport TVSM-5161
SupervisorsLars JohanssonRamböll Sverige AB, Malmö
Ola Dahlblom, Prof.
Div. of Structural Mechanics, Lund
ANALYSIS OF SETTLEMENTS OFTEST EMBANKMENTS DURING50 YEARS - A Comparisonbetween Field Measurementsand Numerical Analysis
For a little more than 50 years, theSwedish Geotechnical Institute (SGI)has had test embankments at differentlocations in Sweden. The aim with thetest embankments has been to followup settlements by field measurementsin order to improve both the generalknowledge and calculation methods.The purpose of this Master Thesis is thatsettlements will be calculated bynumerical methods by use of the finiteelement program PLAXIS and comparethe calculated result with fieldmeasurements. The main objective is tocreate a numerical model whichdescribes the current field situation asrealistic as possible.
The compared objects in this work willbe test embankments at Lilla Mellösaand Skå-Edeby, located in Stockholm.At Lilla Mellösa two test fills wereconstructed by SGI in 1945 – 1947 whileat Skå-Edeby four test fills wereconstructed in 1957. The background tothe building of test fills was the searchof a place for a new international airportoutside Stockholm. The soil condition inboth areas consisted of very com-
pressible soil layers with largethickness.The two-dimensional version of Plaxiswill be used for computing settlements.Plaxis is very practical for solvingcomplex geotechnical problemsinvolving settlement or slope stability.Those elements are then connected bynodes. The stress and tension in everyelement can later be calculated. Thework will be carried out in several steps.The first part of the work will be aliterature study in order to find relevantinformation on the topic. One importantphase of this step is to identify previouswork adopting the same or a similarmethod. Analyses will be carried out forembankments placed on different soillayer profiles. Different methodologieswill be adopted, i.e. separationbetween the mechanical and the porewater phase, and incorporation of bothat the same time (consolidation),respectively. Also different soil modelscan be adopted in order to describe thesoil behaviour as correctly as possible. Araw presentation of the results withoutany interpretations or judgements willbe given.
ExaminerPer Johan Gustafsson, Prof.Div. of Structural Mechanics, Lund
In cooperation withRamböll Sverige AB
The work is performed atRamböll Sverige AB,Malmö
