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Spraustinių polių pagrindo laikomosios galios nustatymas / Determination of bearing capacity of displacement pilesMacijauskas, Darius 15 June 2010 (has links)
Baigiamajame magistro darbe apžvelgti metodai spraustinių polių laikomajai galiai nustatyti. Nagrinėtos dvi metodų grupės – analitiniai ir empiriniai, pagrįsti statinio zondavimo duomenimis. Pagrindinis darbo tikslas yra išanalizuoti ir palyginti nagrinėjamus metodus. Taip pat jie gretinami su eksperimento rezultatais, kas leidžia įvertinti ne tik skirtumus tarp jų, tačiau ir tinkamumą Lietuvos geologinėmis sąlygoms. Eksperimentinę – tiriamąją dalį sudaro geologinio kūno, kuriame įrengti bandomieji poliai, fizikinių – mechaninių savybių apibūdinimas ir polių bandymų įrangos, eigos ir rezultatų aprašymas. Nustatyti pagrindiniai metodų skirtumai, palygintos apskaičiuotos vertės su eksperimento duomenimis. Pateikiamos išvados ir siūlymai tolesniems tyrimams. Darbą sudaro tokios dalys: įvadas, polio apkrovos perdavimas pagrindui, analitinių polio laikomosios galios skaičiavimo metodų apžvalga, empirinių polio laikomosios galios skaičiavimo metodų apžvalga, metodų apibendrinimas, polių bandymas gniuždančia statine apkrova, apskaičiuotų ir eksperimentinių laikomųjų galių gretinimas, išvados ir pasiūlymai, literatūros sąrašas. Darbo apimtis – 64 p. teksto be priedų, 28 iliustr., 10 lent., 39 bibliografiniai šaltiniai. Pridedami darbo priedai. / In master thesis reviewed methods to determine bearing capacity of displacement piles. Two groups of methods analysed – analytical and empirical (based on cone penetration test data). The main aim of the thesis is to overlook and compare with highliting differences of the methods. Also the calculated data is compared with test results. This allows to evaluate the suitability of the methods for Lithuanian geological conditions. Experimental part consists of characteristation of physical – mechanical properties of the geological body where test piles was installed. Also description of test equipment, procedure and results made. Main differences of the methods obtained and test data with calculated values compared. Conclusions and proposals for further investigation represented. Structure: introduction, transmission of pile load to soil, review of analytical methods for determination of pile bearing capacity, review of empirical methods for determination of pile bearing capacity, pile tests on static axial load, comparison of calculated and measured from pile tests results values, conclusions and suggestions, references. Thesis consist of: 64 p. text without appendixes, 28 pictures, 10 tables, 39 bibliographical entries. Appendixes included.
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Application Of The Wave Equation Analysis To Pile DrivingOranc, Nazire Zeynep 01 June 1990 (has links) (PDF)
The methods of analysis used to determine ultimate bearing capacity of piles are applied to a field case in Turkey. During the pile driving works of the Atatü / rk Culture Center in Samsun, Delmag D22-13 and Delmag D-15 diesel pile driving hammers have been used. The ultimate bearing capacity and skin friction values calculated using static formulas have been given as input to the wave equation pile analysis program FADWAVE written by J.E.Bowles. The analytical method used in this program was based on the wave propagation in solids originated in 1962 by E.A.L.Smith. The results obtained from the program are compared with each other.
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Utilização de penetrômetro manual em solo colapsível e comparação com resultados de provas de carga em placa e em sapata / The utilization of a hand penetrometer in a collapsible soil and comparison with load tests in plate and in footingCristina de Hollanda Cavalcanti Tsuha 26 September 2003 (has links)
O presente trabalho tem como objetivo avaliar a utilização de um penetrômetro manual para quantificar a resistência à penetração em um solo poroso e não-saturado. Os ensaios foram efetuados com monitoração de sucção, obtendo-se assim correlações entre resistência à penetração do penetrômetro e a sucção do solo. Os valores de tensão de ruptura obtidos nos ensaios penetrométricos foram comparados com valores de capacidade de carga de ensaios de placa e de provas de carga em sapatas realizados à mesma profundidade, no mesmo local, com medidas simultâneas de sucção. Finalmente, o trabalho comprova a influência da sucção nos resultados dos ensaios realizados / The objective of this work is to evaluate the use of a hand penetrometer to quantify the penetration resistance of a porous and unsaturated soil. The tests were done with suction monitoring, thus, it was obtained correlation between resistance of the penetrometer penetration and the soil suction. The values of rupture pressure obtained by the penetrometer tests were compared with values of bearing capacity of plate load tests and footing load tests, that were done at the same deep and at the same location, with suction measurement. Finally, this work proves the influence of the suction on the tests results
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Evaluación de la capacidad de carga de pilotes excavados en arcillas a través de métodos estáticos y pruebas de cargaNinanya De La Cruz, Karen Stephanie January 2018 (has links)
La evaluación de la capacidad de carga de pilotes juega un rol esencial en su diseño. Esta capacidad puede ser estimada por metodologías teóricas, soluciones analíticas o numéricas, o por métodos semi-empíricos, cuyas aplicaciones están generalmente basadas en resultados de ensayos en campo. Las formulaciones semi-empíricas son comúnmente las más usadas por ingenieros geotécnicos debido a que los métodos teóricos generalmente están limitadas a aplicaciones particulares. Esta investigación compara la capacidad de carga de pilotes excavados por medio de diferentes metodologías, basándose en pruebas de carga experimentales llevadas a cabo en los campos experimentales de la universidad de Brasilia y Campinas, en Brasil. Los métodos semi-empíricos determinan la capacidad de carga ya sea a través del control del asentamiento o extrapolación de la curva carga x asentamiento mientras que los métodos teóricos están basados tanto en soluciones analíticas como numéricas, siendo la última mencionada calculada a través del análisis de los elementos finitos. Las comparaciones que se dieron de las capacidades de carga medidas en pruebas de carga con las obtenidas en resultados numéricos y del control de asentamiento mostraron buenos resultados, mientras que se encontraron valores con mayores errores relativos de los esperados al compararse con las metodologías semi-empíricas. El caso del método teórico presentó conservativos resultados siempre y cuando se considerase el efecto de la fricción negativa.
The evaluation of axial bearing capacity of piles plays an essential role in their design. It can be estimated by theoretical methods, through an analytical or numerical solution, or by semi-empirical methods, whose application is generally based on field test results. Semi-empirical formulations are often preferred by geotechnical engineers since theoretical approaches are generally limited to particular applications. This paper compares the axial bearing capacity of bored piles estimated by different methodologies, based on instrumented load tests carried out in both the Campinas and Brasilia university campus, in Brazil. The semi-empirical approach involved settlement control and extrapolation of load-settlement curve while the theoretical approach was based on both analytical and numerical solutions, the latter computed through finite element analyses. When compared to the ultimate load bearing capacity measured in the instrumented load tests, both numerical and the settlement control results showed close agreement, while the semi-empirical methods estimated major expected relative errors and the theoretical method presented conservative values when considering the negative skin friction effects.
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Efeito da corrosão no comportamento geotécnico e mecânico de tubulações enterradas / The corrosion effect on the geotechnical and mechanical behavior of underground pipelinesÉrika Mendes de Sá 07 July 2003 (has links)
O presente trabalho tem como objetivo avaliar a influência do efeito da corrosão no comportamento geotécnico de condutos enterrados através da utilização de ensaios em modelos reduzidos. Foram empregados diferentes padrões de corrosão, em que se variou o grau e a localização da corrosão. Os resultados do trabalho mostram as localizações mais danosas à estrutura, correlacionando resultados dos tubos corroídos com os de tubos intactos. O duto danificado desencadeou um carregamento assimétrico que deve ser considerado para a prevenção de possíveis deslocamentos. Finalmente, o trabalho avalia a influência conjunta da corrosão e da flexibilidade do conduto no comportamento mecânico das tubulações enterradas. De modo a permitir comparações para averiguar a validade do modelo laboratorial adotado, utilizaram-se simulações numéricas, que possibilitam o estudo do problema de forma mais abrangente. / This work evaluates the influence of corrosion effect on the geotechnical behavior of underground conduits. Small-scale tests were carried out on two different types of pipes, in which the degree and location of the corrosion were changed. The results show the most harmful corrosion locations relative to the intact conduits. The damaged conduits built in and located under asymmetric condition behave as if they were subjected to an asymmetric loading condition and this must be considered to the prevention of possible displacements. Finally, the work evaluates the joined influence of the corrosion and conduit\'s flexibility on the mechanical behavior of underground pipelines. To allow comparisons to inquire the validation of the adopted laboratorial model, numeric simulations were used, which enable the study of the problem considering other corrosion layouts.
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Análise de transferência de carga em estacas escavadas em solo da região de Campinas/SP / Analysis of load transfer in bored piles in soil on the region of Campinas/SPMunévar Pérez, Nurian Bibiana, 1984- 04 November 2014 (has links)
Orientador: Paulo José Rocha de Albuquerque / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo / Made available in DSpace on 2018-08-25T01:37:35Z (GMT). No. of bitstreams: 1
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Previous issue date: 2014 / Resumo: Esta Dissertação teve por objetivo analisar o comportamento de estacas escavadas à trado com três diferentes diâmetros, instrumentadas, submetidas a provas de carga estática. Para isto, foram executadas três estacas com diâmetros de 0.25 m; 0.30 m e 0.40 m, com comprimento de 5.0 m, no Campo Experimental da Faculdade de Engenharia Civil, Arquitetura e Urbanismo ¿ FEC-UNICAMP. A primeira parte da pesquisa consistiu em uma compilação da teoria da transferência de carga e dos métodos teóricos e semi-empíricos para o cálculo da capacidade de carga; em que se utilizou o banco de dados geotécnicos de resultados de ensaios de campo (SPT, CPT, SPT-T) e resultados de laboratórios realizados no local. A segunda parte consistiu no desenvolvimento experimental da pesquisa, em que foram realizadas três provas de carga estáticas do tipo lentas, instrumentadas com extênsometros elétricos no topo e na ponta de maneira a se obter os dados do mecanismo de transferência de carga em profundidade. A partir da realização das provas de carga verificou-se que os ensaios forneceram um valor de carga de ruptura de 180 kN, 210 kN e 240 kN, para as estacas de 0.25m, 0.30m e 0.40m, respectivamente. De acordo aos resultados da instrumentação, as estacas trabalharam preponderantemente por atrito lateral. Observou-se que os métodos semi-empíricos e teóricos, superestimaram a carga de ponta e subestimaram a carga de atrito lateral. Verificou-se que o método Décourt e Quaresma (1996) com a utilização do coeficiente ?=2, foi o que melhor se aproximou e adequou ao local em estudo / Abstract: The objective of this dissertation is analyze the behavior of three bored piles with different diameters, instrumented, subjected to static load tests. For this, it were executed three piles with diameters of 0.25 m; 0.30 m and 0.40 m, with 5.0 m of length at the Experimental Site of School of Civil Enginering, Architecture and Urban Design at University of Campinas ¿ Unicamp. The first part of this research consisted in a compilation of load transfer theory and the study of theoretical and semi-empirical methods for the calculation of load capacity, which used the geotechnical data results of in situ tests (SPT, CPT, SPT-T) and laboratory results performed on site. The second part consisted in the development of experimental research, where three slow static load tests were performed, instrumented in depth with strain gages on top and at the tip in order to obtain information on the load transfer mechanism in depth. After performed the load tests it was found that the tests provide a value of rupture load of 180 kN, 210 kN and 240 kN, for piles of 0.25 m, 0.30 m and 0.40 m, respectively. According to the results of the instrumentation, the pile¿s behavior were predominantly by skin friction. It was observed that the semi-empirical and theorical methods overestimated the load of tip e underestimated the load skin friction. It was found that the Décourt and Quaresma (1996) method using the coefficient ? = 2, which was approached and best suited to the site under consideration / Mestrado / Geotecnia / Mestra em Engenharia Civil
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Análise da capacidade de carga de estaca escavada instrumentada de pequeno diâmetro por meio de métodos semi-empíricos / Analyses of the bearing capacity of small diameter instrumented bored pile by semi-empirical methodsSchulze, Tami, 1986- 06 March 2013 (has links)
Orientador: Paulo José Rocha de Albuquerque / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo / Made available in DSpace on 2018-08-22T22:52:11Z (GMT). No. of bitstreams: 1
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Previous issue date: 2013 / Resumo: Esta pesquisa apresenta uma análise dos resultados da aplicação dos métodos semiempíricos para o cálculo da capacidade de carga do sistema solo - estaca por meio do valor de referência obtido por uma prova de carga instrumentada em profundidade. Para tanto, estudou-se uma estaca escavada por trado mecânico, com diâmetro de 0,25m e comprimento igual a 5,0m e executada no solo do tipo laterítico na região de Campinas-SP. Os parâmetros geotécnicos utilizados foram obtidos a partir de ensaios in-situ (SPT-T, CPT, DPL, DMT), realizados no local. Através da análise da curva carga vs. recalque pelo critério de rigidez de Décourt (1998), constatou-se que o sistema solo - estaca apresentou ruptura física e capacidade de carga de 183kN. Os dados da instrumentação revelaram que a estaca em estudo caracterizou-se como uma estaca de atrito. Os resultados dos métodos semi-empíricos foram agrupados de acordo com: tipo de ensaio in-situ utilizado, tipo de ruptura considerada e distribuição da carga de ruptura total nas parcelas de ponta e lateral. Verificou-se que os resultados de aplicação dos métodos de previsão de capacidade de carga apresentaram uma dispersão elevada dos valores. Observou-se que 93% dos métodos semi-empíricos forneceram resultados abaixo da capacidade de carga obtida da prova de carga / Abstract: This research presents a comparative analysis of the results of the bearing capacity of the soil - pile system calculated by the semi-empirical methods, and the reference value obtained by the instrumented static load test. Therefore, it was studied a mechanical bored pile with 0,25m of diameter and 5,0m of length that was constructed in a lateritic soil deposit on the region of Campinas-SP. The soil parameters needed for the calculations were obtained from in-situ tests (SPT-T, CPT, DPL, DMT), executed in the same place. Based on the load vs. settlement curve analysis and on the rigidity criterion of Décourt (1998), it was found that the bearing capacity of the soil-pile system was 183kN, and it presented ultimate failure. The data collected by straingages installed in the pile showed that the studied pile was classified as a friction pile. The results of the semi-empirical methods were grouped according to the type of in-situ test, type of the failure (ultimate failure, settlement limit) and the distribution of the ultimate load in: toe resistance and shaft resistance. It was verified that the results of the methods to predict the bearing capacity showed large dispersion of the values. It was observed that 93% of the semiempirical methods used in this study presented results below the bearing capacity obtained by the static load test / Mestrado / Geotecnia / Mestra em Engenharia Civil
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Applications Of Method Of Characteristics And Upper Bound Limit Analysis To Different Bearing Capacity ProblemsGhosh, Priyanka 12 1900 (has links) (PDF)
No description available.
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Návrh založení dálničního mostu / The Design of Highway Bridge FoundationsKrálík, Michal January 2019 (has links)
Topic of this master`s thesis is founding of the hightway bridge, which is located between Lipník and Bělotín. Thesis is aimed for creating shallow foundation and foundation on piles and choosing which option is better. All evaluations have been made without specialized software and than compared with GEO5 results. Better solution will be completed with procedure for construction and drawing documentation.
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Development of Stability Evaluation Methods for Soil-Masonry Structure Interactive Problems and Application to Historic Structures / 地盤-石積複合構造物の安定性評価手法の開発と歴史的構造物への適用に関する研究Hashimoto, Ryota 23 March 2017 (has links)
京都大学 / 0048 / 新制・課程博士 / 博士(工学) / 甲第20327号 / 工博第4264号 / 新制||工||1661(附属図書館) / 京都大学大学院工学研究科都市社会工学専攻 / (主査)教授 三村 衛, 教授 大津 宏康, 准教授 肥後 陽介 / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DFAM
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