Numerical simulation of interaction bored pile and soil mass with taking into account the dilatancy of the soil
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Abstract
Pile testing is a necessary and mandatory process of construction buildings and structures erected on pile foundations. There is a need for a correct assessment of the interaction of the elements of the "foundation-pile" system for the reliable and effective design of pile foundations.
The use of soil parameters provided in reports on engineering and geological investigations, without their clarification, leads to a significant discrepancy in the results of numerical modeling of the interaction of piles with the foundation and data from real observations of their settlement as a result of loads. Therefore, there is a need to identify the calculated parameters of the adopted soil model in order to match the simulation results with the results of experimental studies in a wide range of loads.
In this paper, a model of ideal elastic-plastic behavior of the soil environment using the Mohr-Coulomb strength criterion was chosen to describe the interaction behavior of the elements of the "foundation-pile" system. When using this model, it is necessary to take into account a number of its inherent shortcomings, for example, not taking into account the change of the young`s modulus depending the change of the stress-strain state. Additionally, this work examines the influence of the dilatancy effect of sandy soil.
At the initial stage of loads up to 15% of the total settlement of the pile (displacement resulting from potential pile failure), the value of the young`s modulus (E) makes a significant contribution to its operation. At the later stages of loading, significant plastic shear deformations occur in the soil, and accordingly, the leading parameters are the soil strength parameters, in this case, the specific cohesion (c) and the friction angle(φ). Since in this work the drill pile passes through sandy soil for a considerable length, it is also important to take into account the effect of soil dilatation(ψ).
The results of a comparison field test of the bored pile with large-diameter and their numerical simulation of interaction with sandy soils are presented, and the calculation parameters of the soil environment model are identified in order to match the simulation results with experimental data at the corresponding specified loads.
A convergence of up to 5% was achieved in a wide range of loads on the bored pile.
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References
Бойко И.П. Сопротивление просадочных грунтов для расчета буроынъекционных свай / И.П.Бойко, А.Е.Дельник, А.Л.Козак, Н.И.Орленко // Республиканский меж-ведомственный научно-технический сборник «Основания и фундаменты». Выпуск 223. – К.: Будівельник, 1990, с. 5-9.
Бойко І.П. Методи випробувань ґрунтів за допомогою буроін’єкційної палі великого діаметру / І.П. Бойко, Ю.В. Карпенко, С.М. Новофастовський // Основи і фундаменти: Міжвідомчий науково-технічний збірник. – Вип. 328 – К.: КНУБА, 2004. – с. 11-16.
Katzenbach R. Costoptimized foundation systems of high rise structures, based on the results of actual geotechnical research / R. Katzenbach, H. Hoffmann, M. Vogler, Ch. Moormann // Proc. International Conference Trends in Tall Building – Tendenzen im Hochhausbau, Frankfurt am Main, 5.-7.9.2001, с. 421-443.
Зоценко Л.М. Досвід використання буро-ін’єкційних паль в водонасичених лесових ґрунтах / Л.М. Зоценко, В.П. Левчекно, В.М. Зоценко // Строительная наука и техника – Вып. № 3(18) – Минськ, 2008. – С.23.
Зоценко Л.М. Особливості влаштування буроін’єкційних паль у водонасичених піщаних ґрунтах / Л.М. Зоценко, В.П. Левченко, С.В. Біда, М.Ф. Передерій // Зб. наук. праць (Галузеве машинобудування, будівництво). - Полтава: ПНТУ, 2009. -76с.
Boyko I.P., Delnik A.E., Kozak A.L., Orlenko N.I. (1990). Soprotivlenie prosadochnyih gruntov dlya rascheta buroyinektsionnyih svay [Resistance of collapsible soils to calculate continuous flight auger piles]. Respublikanskiy mezhvedomstvennyiy nauchno-tehnicheskiy sbornik «Osnovaniya i fundamentyi». Kyiv: Budivelnik, 223, 5-9 (in Russian).
Boyko I.P., Karpenko Yu.V., Novofastovskyi S.M. (2004) Metody vyprobuvan gruntiv za dopomohoiu buroiniektsiinoi pali velykoho diametru [Methods of soil tests using large-diameter continuous flight auger piles] Osnovy i fundamenty: Mizhvidomchyi naukovo-tekhnichnyi zbirnyk. Kyiv: KNU-BA, 328, 11-16 (in Ukrainian).
Katzenbach R., Hoffmann H., Vogler M., Moormann Ch. (2001). Costoptimized foundation systems of high rise structures, based on the results of actual geotechnical research. Proc. International Conference Trends in Tall Building – Tendenzen im Hochhausbau, Frankfurt am Main, 5.-7.9.2001, с. 421-443.
Zotsenko L.M., Levchekno V.P., Zotsenko V.M. (2008) Dosvid vikoristannya buroinektsiynih pal v vodonasichenih lesovih gruntah [Experience of using continuous flight auger piles in saturated loessial soils] Stroitelnaya nauka i tehnika. Minsk, 3(18), 23 (in Ukrainian).
Zotsenko L.M., Levchenko V.P., Bida S.V., Perederii M.F. (2009) Osoblivosti vlashtuvannya buroinektsiynih pal u vodonasi-chenih pischanih gruntah [Features of the installation continuous flight auger piles in water-saturated sandy soils] Zb. nauk. prats (Galuzeve mashinobuduvannya, budIvnit-stvo). Poltava: PNTU, 76 (in Ukrainian).