@phdthesis{Alabdullah2010,
  author    = {Alabdullah, Jamal},
  title     = {Testing Unsaturated Soil for Plane Strain Conditions : A New Double-Wall Biaxial Device},
  doi       = {10.25643/bauhaus-universitaet.1418},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20100628-15056},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  year      = {2010},
  abstract  = {In der vorliegenden Dissertation wird durch den Autor ein neuer, einzigartiger biaxialer Versuchsstand f{\"u}r die Untersuchung unges{\"a}ttigter B{\"o}den entwickelt und die an Proben von unges{\"a}ttigtem Sand gewonnenen Versuchsergebnisse vorgestellt. Im Wesentlichen werden die Versuche an Proben von Hostun-Sand-Proben durchgef{\"u}hrt. Die Versuchsreihen umfassen die Charakterisierung (Klassifizierung) des Bodens, die Ausarbeitung von Wasserretentionskennlinien (Soil Water Characteristic Curves) und die Durchf{\"u}hrung von biaxialen Kompressionsversuchen an trockenen, ges{\"a}ttigten und unges{\"a}ttigten Proben. Desweiteren werden Modellversuche an Streifenfundamenten zur Untersuchung der Tragf{\"a}higkeit durchgef{\"u}hrt. Begr{\"u}ndet durch die Ver{\"a}nderung des Bodenverhaltens durch geringe Anteile von bindigem Material, werden zus{\"a}tzlich Versuche mit einer Mischung aus Sand und Kaolinit analysiert.},
  subject      = {Unges{\"a}ttigte Zone},
  language  = {en}
}
@phdthesis{Arifin2008,
  author    = {Arifin, Yulian Firmana},
  title     = {Thermo-hydro-mechanical behavior of compacted bentonite-sand mixtures: an experimental study},
  doi       = {10.25643/bauhaus-universitaet.852},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20081006-14288},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  year      = {2008},
  abstract  = {Heat, gas, and leachate are primary by-products of landfill processes in municipal solid waste landfills. In nuclear waste repository, temperature of the waste also raises due to radioactivity processes. Temperature increase in the repository induces hydro-mechanical processes of its sealing material. Moderate to high temperature is expected to be encountered in the field situation. In this thesis, a study on the thermo-hydro-mechanical behavior of compacted bentonite-sand mixtures which are among the materials proposed to be used as sealing material for landfills and hazardous waste repository is presented. Mixtures of a calcium-type bentonite, Calcigel, and quartz sand were used in this study. Series of tests including suction and swelling pressure measurement, drying-wetting under unconfined and confined conditions were conducted at a moderately high temperature. Tests at room temperature including basic and physico-chemical characterization, microstructure and fabric studies, and osmotic suction were conducted in order to provide insight into understanding the hydro-mechanical processes taking place in the bentonite. The experimental data obtained are presented and compared to the result of the previous tests for the same material performed by other researchers at room temperature. The changes in hydro-mechanical behavior due to elevated temperature were analyzed and discussed based on the suction components of soil which are influenced by temperature. At the end, conclusions concerning the temperature effects on the hydro-mechanical behavior of the materials are drawn and suggestions for future studies are made.},
  subject      = {Temperatur},
  language  = {en}
}
@techreport{Asslan,
  author    = {Asslan, Milad},
  title     = {Factors Influencing Small-Strain Stiffness of soils and its Determination},
  doi       = {10.25643/bauhaus-universitaet.1587},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20120402-15870},
  abstract  = {This term paper presents a literature review and discusses concepts of the following point: 1- Factors affecting small-strain stiffness in soil; 2- Methods to determine small-strain shear stiffness in laboratory and in-situ; 3- Brief introduction into wave propagation and 4- Bender elements technique to determine shear wave velocity in soil.},
  subject      = {Soil},
  language  = {en}
}
@misc{Asslan,
  type      = {Master Thesis},
  author    = {Asslan, Milad},
  title     = {An Experimental Study on the Initial Shear Stiffness in Granular Material under Controlled Multi-Phase Laboratory Conditions},
  doi       = {10.25643/bauhaus-universitaet.1584},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20120402-15842},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {100},
  abstract  = {The initial shear modulus, Gmax, of soil is an important parameter for a variety of geotechnical design applications. This modulus is typically associated with shear strain levels about 5*10^-3\% and below. The critical role of soil stiffness at small-strains in the design and analysis of geotechnical infrastructure is now widely accepted. Gmax is a key parameter in small-strain dynamic analyses such as those to predict soil behavior or soil-structure interaction during earthquake, explosions, machine or traffic vibration where it is necessary to know how the shear modulus degrades from its small-strain value as the level of shear strain increases. Gmax can be equally important for small-strain cyclic situations such as those caused by wind or wave loading and for small-strain static situations as well. Gmax may also be used as an indirect indication of various soil parameters, as it, in many cases, correlates well to other soil properties such as density and sample disturbance. In recent years, a technique using bender elements was developed to investigate the small-strain shear modulus Gmax. The objective of this thesis is to study the initial shear stiffness for various sands with different void ratios, densities, grain size distribution under dry and saturated conditions, then to compare empirical equations to predict Gmax and results from other testing devices with results of bender elements from this study.},
  subject      = {Soil},
  language  = {en}
}
@misc{Buechner2005,
  type      = {Master Thesis},
  author    = {B{\"u}chner, Stefan},
  title     = {Methoden zur Ermittlung von Materialkennwerten f{\"u}r numerische Berechnungen in der Geotechnik},
  doi       = {10.25643/bauhaus-universitaet.552},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-5524},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  year      = {2005},
  abstract  = {Bei der Bearbeitung geotechnischer Aufgabenstellungen treten h{\"a}ufig Probleme bei der Vorhersage des Setzungsverhaltens von B{\"o}den auf. Numerische Methoden auf Basis finiter Elemente oder finiter Differenzen werden oftmals als Hauptinstrumente der Prognose verwendet. Dabei erzielen sie jedoch nicht selten Ergebnisse, die im Nachhinein als unbefriedigend bezeichnet werden m{\"u}ssen. Eine Begr{\"u}ndung daf{\"u}r liegt in der Verwendung linearer Stoffgesetze, die auf Ans{\"a}tze aus der Elastizit{\"a}tstheorie beruhen. Werden h{\"o}herwertige Stoffgesetze eingesetzt, so fehlen oftmals gesicherte Aussagen zu den erforderlichen Bodenkennwerten. Diese m{\"u}ssen durch ein umfangreiches Versuchsprogramm mit einer aufwendigen Auswertung bestimmt werden. Ziel dieser Arbeit ist es daher, eine robuste Methode zu entwickeln, die in der Lage ist, aus Messwerten (Feld) und Versuchsergebnissen (Labor) geeignete Parameter f{\"u}r Modelle mit nichtlinearer Konsolidationstheorie zu ermitteln. Dazu werden die M{\"o}glichkeiten der Mathematik ausgenutzt, welche inverse Methoden zur Verf{\"u}gung stellt, mit denen man mehrere Bodenkennwerte (haupts{\"a}chlich Steifigkeiten und Durchl{\"a}ssigkeiten) gleichzeitig unter Be-r{\"u}cksichtung ihrer Wechselbeziehungen zueinander bestimmen kann. Als Instrumentarium daf{\"u}r steht das Programm AdConsol-1D zur Verf{\"u}gung, welches die inverse Parameterermittlung auf Basis mathematischer Optimierungsmethode erm{\"o}glicht. Ein Test- und Versuchsdamm, der im Finnischen Haarajoki (Haarajoki Test Embankment) errichtet wurde und {\"u}ber l{\"a}ngeren Zeitraum messtechnisch {\"u}berwacht wurde, dient als Validationsbeispiel. Dieser wurde auf sehr verformungsempfindlichem Boden errichtet. Durch Aufbereitung und Auswertung der Feld- und Laborversuche am Haarajoki Test Embankment wurden die Grundlagen f{\"u}r die inverse Parameterermittlung geschaffen. Dazu wurde eine Methode zur Konstruktion plausib-ler Porenwasser{\"u}berdr{\"u}cke aus Setzungsmessungen und Laborversuchsdaten entwickelt. Mit den Werten der Optimierung wurde ein Modell im 2D FEM Programm Plaxis erstellt, welches die in Haarajoki gemessenen Setzungen und Porenwasserdr{\"u}cke m{\"o}glichst genau reproduzieren sollte. Es zeigte sich, dass sich Bodenparameter des eindimensionalen nichtlinearen Konsolidati-onsmodells nicht problemlos auf ein 2D FEM Modell {\"u}bertragen lassen. Insbesondere fehlen gesicherte Aussagen {\"u}ber die Gr{\"o}ße des horizontalen Durchl{\"a}ssigkeitskoeffizienten kx und des Referenzsekantenmoduls E50Ref aus dem Triaxialversuch. Die inverse Berechnung f{\"u}r sich betrachtet verlief dahingegen zufrieden stellend mit dem eindimensionalen Modell in AdConsol-1D. Auf dieser Grundlage ist die Erstellung einer realistischen Prognose des weiteren Konsolidationsverlaufes am Haarajoki Test Embankment m{\"o}glich.},
  subject      = {Konsolidation},
  language  = {de}
}
@misc{Khan2005,
  type      = {Master Thesis},
  author    = {Khan, Muhammad Ibrar},
  title     = {HYDRAULIC PROPERTIES OF POLYMER-ENHANCED BENTONITE-SAND MIXTURE},
  doi       = {10.25643/bauhaus-universitaet.680},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-6803},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  year      = {2005},
  abstract  = {The hydraulic properties of the polymer-enhanced bentonite-sand mixtures (PEBSMs) investigated in this study consisted of the water retention behaviour (or the soil-water characteristic curve (SWCC)) and the saturated and unsaturated coefficients of permeability. The SWCCs of the compacted polymer-enhanced bentonite-sand mixtures were measured using two techniques; namely, axis-translation technique and vapour equilibrium technique. The results obtained from both methods were combined to establish a single SWCC for each specimen. The saturated coefficient of permeability of the material was measured using the constant-head flexible wall permeameter method. The unsaturated coefficient of permeability was computed from the SWCCs and the saturated permeability values using the statistical model. The study revealed that the wetting curves for the PEBSM and clay are above the drying curves. The fact is thought be due to the specimens being not saturated before starting the drying tests. Since the specimens are expensive soil such a trend can be expected. The permeability deduced from the oedometer test data over-estimates the actual water flow rate resulting in a higher computed saturated coefficient of permeability compared to the measured values. The nets of polymer and bentonite clusters are thought to retard the flow of water during the direct measurement. However, the net of polymer and bentonite clusters are compressed during loading and rebound during unloading. Hysteresis effect was found for the PEBSMs in the permeability versus degree of saturation curve. This is due to possible difference in the spatial distribution of water in the specimens depending whether the specimens were on drying or wetting path.},
  subject      = {Baustoff},
  language  = {en}
}
@misc{Remmert2005,
  type      = {Master Thesis},
  author    = {Remmert, Frank},
  title     = {Bestimmung hydraulischer Eigenschaften von teilges{\"a}ttigten granularen Reibungsmaterialien in einem S{\"a}ulenversuch},
  doi       = {10.25643/bauhaus-universitaet.664},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-6647},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  year      = {2005},
  abstract  = {Diese Diplomarbeit beschreibt die Durchf{\"u}hrung eines dynamischen Sands{\"a}ulenversuches zur Bestimmung der Wassercharakteristikkurven (SWCC) und der teilges{\"a}ttigten Durchl{\"a}ssigkeiten des Sandes. Als Messinstrumente wurden TDR-Sonden und Tensiometer verwendet. Die TDR-Sonden wurden eigens f{\"u}r diesen Versuch kalibriert. Messgr{\"o}ßen waren der volumetrische Wassergehalt und die Kapillarspannung im Sand. F{\"u}r die Auswertung kamen statistische Modelle zum Einsatz, insbesondere das Modell nach FREDLUND \& XING. Dar{\"u}ber hinaus wurde gepr{\"u}ft, in wie weit die Wassercharakteristikkurven (SWCC) auch {\"u}ber inverse Berechnungsverfahren ermittelbar sind.},
  subject      = {Bodenanalyse},
  language  = {de}
}
@phdthesis{Samingan2005,
  author    = {Samingan, Agus Setianto},
  title     = {An Experimental Study on Hydro-Mechanical Characteristics of Compacted Bentonite-Sand Mixtures},
  doi       = {10.25643/bauhaus-universitaet.646},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20051007-7082},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  year      = {2005},
  abstract  = {Nuclear and hazardous waste disposal issues have become universal issues and problems related to the final disposal of these waste including finding a suitable site, natural and engineered barriers used, construction of the repository, long-term performance assessment have gained increasing attention all over the world. High-level radioactive and hazardous waste are required to be buried in deep geological repositories. In Germany, the ongoing researches have assessed the suitability of salt-stone formation in the country as a host rock candidate for its nuclear waste repository. Bentonite-based materials have been proposed to be used as sealing and buffer elements for the nuclear waste repository. Several hydro-mechanical processes will take place in the field and influence behaviour of the sealing and buffer elements of the repository. In this dissertation, a study on the hydro-mechanical characterisation of bentonite-sand mixtures is presented. Mixtures of a calcium-type bentonite, named Calcigel, and quartz sand were used in the investigation. Series of experiments including basic and physico-chemical characterisation, microstructure and fabric studies, suction and swelling pressure measurements, wetting and drying test, one-dimensional compression-rebound test, one-dimensional cyclic wetting-drying test under constant vertical stress, and saturated permeability test were conducted. The experimental data obtained are analysed and several characteristics of the material are brought out in this dissertation. Conclusions regarding basic behaviour of the materials are drawn based on the results of microstructure and fabric studies. Factors influencing the magnitude of suction and swelling pressure of the materials are outlined and discussed. The suction-induced compression and rebound characteristics of the material are described. The wetting and drying behaviour as influenced by the material boundary conditions are discussed. Permeability characteristics of the materials are examined based on several available permeability models. Several mechanical and hydraulic parameters that can be used in modelling using some available constitutive modelling approaches are derived based on the experimental data. At the end, conclusions regarding the hydro-mechanical characteristics of the materials are drawn and suggestions for future studies are made.},
  subject      = {hydro-mechanics},
  language  = {en}
}
@article{SchanzTripathy,
  author    = {Schanz, Tom and Tripathy, Snehasis},
  title     = {Swelling pressure of a divalent-rich bentonite: Diffuse double-layer theory revisited},
  series = {Water Resources Research},
  journal   = {Water Resources Research},
  doi       = {10.1029/2007WR006495},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170425-31592},
  abstract  = {Physicochemical forces are responsible for the swelling pressure development in saturated bentonites. In this paper, the swelling pressures of several compacted bentonite specimens for a range of dry density of 1.10-1.73 Mg/m3 were measured experimentally. The clay used was a divalent-rich Ca-Mg-bentonite with 12\% exchangeable Na+ ions. The theoretical swelling pressure-dry density relationship for the bentonite was determined from the Gouy-Chapman diffuse double-layer theory. A comparison of experimental and theoretical results showed that the experimental swelling pressures are either smaller or greater than their theoretical counterparts within different dry density ranges. It is shown that for dry density of the clay less than about 1.55 Mg/m3, a possible dissociation of ions from the surface of the clay platelets contributed to the diffuse double-layer repulsion. At higher dry densities, the adsorptive forces due to surface and ion hydration dominated the swelling pressures of the clay. A comparison of the modified diffuse double-layer theory equations proposed in the literature to determine the swelling pressures of compacted bentonites and the experimental results for the clay in this study showed that the agreement between the calculated and experimental swelling pressure results is very good for dry densities less than 1.55 Mg/m3, whereas at higher dry densities the use of the equations was found to be limited.},
  subject      = {Bentonit},
  language  = {en}
}
@inproceedings{SchanzWuttkeDineva,
  author    = {Schanz, Tom and Wuttke, Frank and Dineva, Petia},
  title     = {HYBRID APPROACH OF WAVE NUMBER INTEGRATION-BOUNDARY INTEGRAL EQUATION METHOD FOR SITE EFFECT ESTIMATION OF A LATERALLY VARYING SEISMIC REGION},
  editor    = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten},
  organization    = {Bauhaus-Universit{\"a}t Weimar},
  doi       = {10.25643/bauhaus-universitaet.2913},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29132},
  pages     = {15},
  abstract  = {In this paper we evaluate 2D models for soil-water characteristic curve (SWCC), that incorporate the hysteretic nature of the relationship between volumetric water content Θ and suction Ψ. The models are based on nonlinear least squares estimation of the experimental data for sand. To estimate the dependent variable Θ the proposed models include two independent variables, suction and sensors reading position (depth d in the column test). The variable d represents not only the position where suction and water content are measured but also the initial suction distribution before each of the hydraulic loading test phases. Due to this the proposed 2D regression models acquire the advantage that they: (a) can be applied for prediction of Θ for any position along the column and (b) give the functional form for the scanning curves.},
  subject      = {Architektur <Informatik>},
  language  = {en}
}
@inproceedings{StoimenovaLinsDatchevaetal.,
  author    = {Stoimenova, Eugenia and Lins, Yvonne and Datcheva, Maria and Schanz, Tom},
  title     = {INVERSE MODELLING OF SOIL HYDRAULIC CHARACTERISTIC FUNCTIONS},
  editor    = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten},
  organization    = {Bauhaus-Universit{\"a}t Weimar},
  doi       = {10.25643/bauhaus-universitaet.2985},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-29858},
  pages     = {12},
  abstract  = {In this paper we evaluate 2D models for soil-water characteristic curve (SWCC), that incorporate the hysteretic nature of the relationship between volumetric water content θ and suction ψ. The models are based on nonlinear least squares estimation of the experimental data for sand. To estimate the dependent variable θ the proposed models include two independent variables, suction and sensors reading position (depth d in the column test). The variable d represents not only the position where suction and water content are measured but also the initial suction distribution before each of the hydraulic loading test phases. Due to this the proposed 2D regression models acquire the advantage that they: (a) can be applied for prediction of θ for any position along the column and (b) give the functional form for the scanning curves.},
  subject      = {Architektur <Informatik>},
  language  = {en}
}
@misc{Vu2005,
  type      = {Master Thesis},
  author    = {Vu, Manh Quynh},
  title     = {M{\"o}glichkeiten zur Bewertung des Zustandes von Straßenbauten (Bau und Rekonstruktion) unter Einbeziehung seismischer Messungen .},
  doi       = {10.25643/bauhaus-universitaet.649},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-6498},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  year      = {2005},
  abstract  = {Central point of this study is to evaluate stiffness properties of pavement, specifically the E or G- modulus determined by different testing methods. Stiffness of soil is both stress and strain dependent property and otherwise different methods usually affect the material in different ways. The Young's modulus E0 and shear modulus G0 correspond to the very small strain level are regarded as the initial or maximal stiffness of the relevant stress-strain curves of a given material. The modulus decay curve is called the degradation curve, which also reviewed in this study. With the results of different measurement methods applied for a reclaimed mining site in Klettwitz for determining of stiffness parameter of subsoil, author have tried to find a unification between the results considering the relationship between stiffness parameter and the range of strain levels. The testing methods executed at plant S9 in Klettwitz-S{\"u}dfeld are: laboratory oedometer test, static plate load test, dynamic plate load test, and seismic testing methods (spectral analysis of surface wave, SASW). Some results getting from this study are: one receives different absolute values of stiffness parameter from different testing methods. The reason is different testing methods produce different range of strain levels in soil during their execution. Conventional and non-destructive testing methods should be combined together for investigating of subsoil characteristics. This means, the soil parameters must be adjusted to the current range of strain level. Especially for settlement calculation it is recommended that different values of stiffness modulus, Es, resulted by different testing methods should be simultaneously utilized along the depth beneath loading surface. Accuracy for determining of stiffness degradation curves depends a lot on the determination of maximal stiffness parameters (E0, G0) at the range of very small strain level, and it still requires much further studies.},
  subject      = {Straßenbau},
  language  = {en}
}
@phdthesis{Wuttke2004,
  author    = {Wuttke, Frank},
  title     = {Beitrag zur Standortidentifizierung mit Oberfl{\"a}chenwellen},
  doi       = {10.25643/bauhaus-universitaet.653},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20050708-6874},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  year      = {2004},
  abstract  = {In der Dissertation wurden unterschiedliche Methoden zur Standortidentifizierung mit Oberfl{\"a}chenwellen analysiert. Es wurden neue Methoden zur Parameteridentifikation unter Nutzung von Oberfl{\"a}chenwellen vorgeschlagen. Die Ziele der Arbeit k{\"o}nnen wie folgt definiert werden: a) Die Entwicklung eines geeigneten theoretischen Modells als Grundlage zur Untersuchung des Standortes hinsichtlich vorhandener Bodensteifigkeiten. b) Die Entwicklung einer neuen Inversionsmethodik unter Ber{\"u}cksichtigung aller auftretenden Moden im Oberfl{\"a}chenwellenfeld. Die Erstellung eines Modells des vertikal heterogenen Untergrundes erfolgte im Frequenz-bereichs f{\"u}r beliebig geschichtete B{\"o}den, aufbereitet durch weitestgehend analytische Formulierungen. Durch Nutzung beliebiger horizontaler, elastisch-isotroper Schichten konnte die vertikale Heterogenit{\"a}t approximiert werden. Die Definition der Green'schen Funktionen wurde in Form der Reflexions- und Transmissionskoeffizienten durchgef{\"u}hrt. Die L{\"o}sung des formulierten Halbraumproblems erfolgte unter Verwendung der Konturintegration. Dazu wurde die Vorgehensweise der bestehenden L{\"o}sung des homogenen Halbraums auf das Problem des geschichteten Mediums {\"u}bertragen. Die daraus sich ergebende L{\"o}sung ist in ein K{\"o}rperwellen- und ein Oberfl{\"a}chenwellenfeld separiert. Der Vorteil dieser analytischen Betrachtungsweise liegt in der eindeutigen Zuordnungsm{\"o}glichkeit der erhaltenen L{\"o}sungen zu Wellentypen und in der klaren Dispersionscharakteristik der berechneten Modelle. Im Gegensatz dazu liefern numerische L{\"o}sungen, wie FEM, immer ein Wellenfeld, in dem die Wellentypen zugeordnet bzw. interpretiert werden m{\"u}ssen. Mit Hilfe der synthetischen Bodenmodellierung wird das Verhalten von geschichteten B{\"o}den bei durchlaufenden Oberfl{\"a}chenwellenfeldern simuliert und untersucht. F{\"u}r die Untersuchung der Profile wurde haupts{\"a}chlich die Modale Superposition von Oberfl{\"a}chenwellen und die Wellenzahl-Integration verwendet. Bei der Analyse von Oberfl{\"a}chenwellenfeldern in vorhandenen Medien sind abweichend von den {\"u}blichen seismischen Methoden spezielle Untersuchungsmethoden zur Ermittlung der vorhandenen Dispersion notwendig. Zur Durchf{\"u}hrung der Dispersionsanalyse wird in geotechnischen Untersuchungen in der Regel das Phasen-Differenzen-Verfahren (SASW) genutzt. Aufgrund der beschr{\"a}nkten Aussagef{\"a}higkeit dieses Verfahrens zu auftretenden h{\"o}heren Moden werden verbesserte Analysemethoden zur experimentellen Auswertung hinzugezogen. Diese Methoden nutzen zur Informationsgewinnung das r{\"a}umlich ausgedehnte Wellenfeld. Ausgehend von dem Dispersionsverhalten kann die Bodenstruktur mittels inverser Methoden bestimmt werden. F{\"u}r die gemeinsame Inversion der in den Messungen vorhandenen Moden wurde ein entsprechendes Inversionsverfahren abgeleitet. Als Grundlage der Inversion wurde ein Verfahren des kleinsten Fehlerquadrates gew{\"a}hlt. Der Vorteil hinsichtlich einer effizienten und stabilen Inversion unter Nutzung dieser Methodik {\"u}berwiegt den Nachteil der lokalen Suche nach dem Fehlerminimum. Zum Erreichen der stabilen und zielgerichteten Inversion wird der Levenberg-Marquardt Algorithmus, zusammen mit der Wichtung der Dispersions{\"a}ste entsprechend ihres Anregungsverhaltens in den Dispersionsspektren, eingesetzt. Von Vorteil hat sich innerhalb der Arbeit die gleichzeitige Behandlung von theoretischen und experimentellen Parameterstudien erwiesen, da sich Ergebnisse und Erkenntnisse beider Seiten erg{\"a}nzten. Eine Interpretation von Felddaten kann damit weitaus sicherer durchgef{\"u}hrt werden. Zus{\"a}tzlich konnten die erarbeiteten experimentellen und theoretischen Verfahren gegenseitig {\"u}berpr{\"u}ft werden.},
  subject      = {Inversionsalgorithmus},
  language  = {de}
}