توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Evaluation of CPT Cone Factor in South Pars Field, Persian Gulf
نویسنده(ها): ، ،
اطلاعات انتشار: چهاردهمین همایش صنایع دریایی، سال
تعداد صفحات: ۶
In the current study, the results of numerous piezocone penetration tests performed in various locations of South Pars Gas & Oil field, Persian Gulf, Iran, were used to evaluate undrained shear strength of marine clay of the site using cone factors. Comparison of variation of undrained shear strength and PCPT results in depth was shown that cone factor can be a useful parameter to determine undrained shear strength, indirectly, from cone tip resistance. It was observed that there is a relatively strong correlation between undrained shear strength of soil and cone tip resistance. With studying the variations of cone factors in depth, an average value of Nk=18 and Nkt= 21 were proposed for South Pars field. In addition, the results were demonstrated the importance of taking the effect of pore water pressure into account for determining cone factor. Moreover, it was showed that cone factor is rather dependent to over–consolidation ratio of soil. As over–consolidation ratio increased both cone factors decreased with a descending rate<\div>

۲Predicting ε50 for Lateral Response of Piles in Marine Clay Using an Evolutionary–Based Approach
نویسنده(ها): ،
اطلاعات انتشار: پانزدهمین همایش صنایع دریایی، سال
تعداد صفحات: ۱۰
Analyzing piles subjected to lateral loads significantly depends on soil resistance at any point along the pile as a function of pile deflection, known as p–y curve. On the other hand, the deformation characteristics of soil defined as the soil strain at 50% of maximum deviatoric stress (ε50) has considerable effect on the generated p–y curve. In thisresearch, several models are proposed to predict ε50 specifically for designing very long pile foundations of offshore oiland gas platforms in South Pars field, Persian Gulf, Iran. Herein, ε50 is evaluated from extensive soil data of marineclays including in–situ and laboratory test results using evolutionary polynomial regression (EPR). It is demonstrated that the normalized cone tip resistance, which is an indication of soil undrained shear strength, leads to more realistic ε50 values compared with the laboratory–derived undrained shear strength parameter. Furthermore, the results of anumerical study on lateral pile–soil system are used in order to show the efficiency of the proposed model in predicting lateral pile response<\div>
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