نتایج جستجو برای: Raft

تعداد نتایج: 5927  

In the recent years, non-connected piled raft foundation has been considered as an economical and practical deep foundation in the situation that high shear and concentrated loads may occur at the connection of the raft and pile head. This paper was presented an experimental study of a square foundation on the effects of parameters such as S/D, L/D and etc. in two cases of connected or non-conn...

A. Eslami, S. Salehi Malekshah

For the optimum design of Piled Raft Foundations (PRF), the concept of settlement reducer piles has been applied. However, when these piles are connected to the raft, a high stress may develop in the relatively small number of piles. Therefore, an alternative approach is to disconnect the piles from the raft forming a new system called a non-connected or disconnected piled-raft foundation (NCPR...

A. Eslami, M. M. Ranjbar and T. Riyazi, M. Veis Karami,

Application of pile-raft foundations, which are known as “compound foundations”, is a suitable alternative in the case of heavy load structures. The interaction behavior of pile raft foundations makes these systems very complex to analyze. Different methods have been proposed to determine the bearing capacity of piled raft systems and distribution of loads between the components, i.e. pile grou...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اصفهان - دانشکده علوم 1389

در بخش نخست این تحقیق، سطح پلی وینیل الکل (pva) با کوپلیمریزاسیون پیوندی از طریق فرایند انتقال زنجیر برگشت پذیر افزایشی-تجزیه اصلاح شده است. گروه های هیدروکسیل پلی وینیل الکل در دو مرحله مجزا ابتدا توسط برهمکنش با یک ترکیب آسیل کلراید به pva-cl تبدیل و سپس از طریق برهمکنش با 1-برمو نفتالن در حضور کربن دی سولفید توسط واکنش گرینیارد به یک عامل raft بر پایه پلی وینیل الکل تبدیل شد. در انتها پلیمری...

The results of an ongoing FEM parametric study are presented regarding the dependence of the resulting piled raft behavior under lateral load and combination of loads on pile diameter, pile length, arrangement of piles and raft thickness. Taguchi method with Analysis of Variance (ANOVA) was employed to calculate the contribution ratio of these factors on the lateral displacement of piled raft. ...

Journal: :international journal of civil engineering 0
a. saeedi azizkandi school of civil engineering, iran university of science and technology, tehran, iran m.h. baziar school of civil engineering, iran university of science and technology, tehran, iran h. rasouli school of civil engineering, iran university of science and technology, tehran, iran m. modarresi school of civil engineering, iran university of science and technology, tehran, iran h. shahnazari school of civil engineering, iran university of science and technology, tehran, iran

in present research, 17 centrifuge tests have been conducted to study the effect of various parameters such as the number of piles, the distance between piles, gradation and thickness of the granular layer on the load-settlement behavior of a pile raft system. the results showed the importance of granular layer to reduce the settlement of non-connected pile raft system when the roles of piles a...

A. Eslami, M. M. Ranjbar and T. Riyazi, M. Veis Karami,

Application of pile-raft foundations, which are known as “compound foundations”, is a suitable alternative in the case of heavy load structures. The interaction behavior of pile raft foundations makes these systems very complex to analyze. Different methods have been proposed to determine the bearing capacity of piled raft systems and distribution of loads between the components, i.e. pile grou...

روستا, حمید رضا, سجادی نیا, عبدالرضا,

Aquaponic is a combination of fish and plant cultivated in recirculating systems. Fish culture in closed recirculating systems causes organic waste accumulation in the system. If these metabolites are used for plant nutrition, they are not mere waste, but have economical value and however benefit the fish production systems. Most aquaponic systems are designed as perlite-filled media, thin laye...

Journal: :computational methods in civil engineering 2012
v.j. sharma s.a. vasanvala c.h. solanki

in order to mobilize shallow soil to participate in the interaction of piled raft foundation sufficiently, the concept of piled raft has been modified to new type of foundation named composite piled raft. in the system of composite piled raft, the short piles made of flexible materials is used to strengthen the shallow soft soil, while the long piles made of relatively rigid materials is used t...

Journal: :international journal of civil engineering 0
m.h. baziar a. ghorbani r. katzenbach

the pile-raft foundation is a combination of a raft foundation with piles. pile-raft foundation has been widely designed, assuming all structure loads to be transferred to piles without considering contribution of the load taken by contact surface between raft and soil. methods of analysis currently used in practice are based upon relatively conservative assumptions of soil behavior or on the l...

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