Simple Design Tools For Piled Raft Foundations

Hint

Swipe to navigate through the articles of this issue

01-12-2018 | Technical Note | Issue 1/2018

Economic design optimization of piled raft foundations

Journal:: Innovative Infrastructure Solutions > Issue 1/2018

Abstract

Most conventional piled raft design methods focus on ultimate limit state and/or serviceability limit state, with economics being evaluated afterward. Economics is a basic requirement of the piled raft foundation design. The piled raft foundation cost estimation consists of two tasks: the material quantities and the construction labor, and its assembly include three tasks: installation, reinforcement and concrete. In this paper, piled raft construction cost is the objective function and the piled raft design parameters such as: allowable settlement, allowable differential settlement and maximum moment of the raft, are the performance indices. The design procedure in this study was obtained through two stages. At the first stage, different pile configurations were considered and the pile length, diameter and the space were changed for obtaining equal construction cost in all pile configurations. At the second stage, performance indices for each pile configuration were calculated. Each pile configuration has a maximum performance index, which is the optimum pile configuration. Sensitivity of the studies on the pile raft cost shows that, for typical pile raft foundation design, pile spacing and configuration are the key parameters in economic design. In general, it is recommended that, according to a given applied load (amount of load and load type), the optimum pile configuration method should be used in combination with a reasonable increasing of the pile length and/or pile positions to achieve the best possible behavior of the piled raft foundation.

Please log in to get access to this content

To get access to this content you need the following product:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

über 69.000 Bücher
über 500 Zeitschriften

aus folgenden Fachgebieten:

Automobil + Motoren
Bauwesen + Immobilien
Business IT + Informatik
Elektrotechnik + Elektronik
Energie + Umwelt
Finance + Banking
Management + Führung
Marketing + Vertrieb
Maschinenbau + Werkstoffe
Versicherung + Risiko

Testen Sie jetzt 30 Tage kostenlos.

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Technik" erhalten Sie Zugriff auf:

über 50.000 Bücher
über 380 Zeitschriften

aus folgenden Fachgebieten:

Automobil + Motoren
Bauwesen + Immobilien
Business IT + Informatik
Elektrotechnik + Elektronik
Energie + Umwelt
Maschinenbau + Werkstoffe

Testen Sie jetzt 30 Tage kostenlos.

Springer Professional "Wirtschaft"

Online-Abonnement

Mit Springer Professional "Wirtschaft" erhalten Sie Zugriff auf:

über 58.000 Bücher
über 300 Zeitschriften

aus folgenden Fachgebieten:

Bauwesen + Immobilien
Business IT + Informatik
Finance + Banking
Management + Führung
Marketing + Vertrieb
Versicherung + Risiko

Testen Sie jetzt 30 Tage kostenlos.

go back to reference El Gendy M, Hanish J, Kany M (2006) Empirical nonlinear analysis of piled raft. Bautechnik 83(9):604–617 CrossRef El Gendy M, Hanish J, Kany M (2006) Empirical nonlinear analysis of piled raft. Bautechnik 83(9):604–617 CrossRef

go back to reference El Gendy M (2007) Formulation of a composed coefficient technique for analyzing large piled raft. Sci Bull Fac Eng Ain Shams Univ 42(1):29–56 El Gendy M (2007) Formulation of a composed coefficient technique for analyzing large piled raft. Sci Bull Fac Eng Ain Shams Univ 42(1):29–56

go back to reference Horikoshi K, Randolph MF (1998) A contribution to the optimum design of piled rafts. Géotechnique 48(2):301–317 CrossRef Horikoshi K, Randolph MF (1998) A contribution to the optimum design of piled rafts. Géotechnique 48(2):301–317 CrossRef

go back to reference Kany M, El Gendy M, El Gendy A (2006) Benutzerhandbuch für das Programm ELPLA (einige Bunden in das Programmsystem GEOTEC), Zirndorf Kany M, El Gendy M, El Gendy A (2006) Benutzerhandbuch für das Programm ELPLA (einige Bunden in das Programmsystem GEOTEC), Zirndorf

go back to reference Lee J, Kim Y, Jeong S (2010) Three-dimensional analysis of bearing behavior of piled raft on soft clay. Comput Geotech 37:103–114 CrossRef Lee J, Kim Y, Jeong S (2010) Three-dimensional analysis of bearing behavior of piled raft on soft clay. Comput Geotech 37:103–114 CrossRef

go back to reference Mandolini A, Viggiani C (1997) Settlement of piled foundations. Géotechnique 47(4):791–816 CrossRef Mandolini A, Viggiani C (1997) Settlement of piled foundations. Géotechnique 47(4):791–816 CrossRef

go back to reference Poulos HG (1994) An approximate numerical analysis of pile-raft interaction. Int J Numer Anal Methods Geomech 18(2):73–92 CrossRef Poulos HG (1994) An approximate numerical analysis of pile-raft interaction. Int J Numer Anal Methods Geomech 18(2):73–92 CrossRef

go back to reference Poulos HG (2001) Piled raft foundations: design and applications. Géotechnique 51:95–113 CrossRef Poulos HG (2001) Piled raft foundations: design and applications. Géotechnique 51:95–113 CrossRef

go back to reference Rabiei M (2010) Effect of pile configuration and loading type on piled raft foundations performance. In: ASCE, deep foundations and geotechnical in situ testing (GSP 205), pp 34–41 Rabiei M (2010) Effect of pile configuration and loading type on piled raft foundations performance. In: ASCE, deep foundations and geotechnical in situ testing (GSP 205), pp 34–41

10.

go back to reference Rabiei M (2009) Parametric study for piled raft foundations. Electron J Geotech Eng 14(Bundle A):1 Rabiei M (2009) Parametric study for piled raft foundations. Electron J Geotech Eng 14(Bundle A):1

11.

go back to reference Rabiei M, Janalizadeh Choobbasti A (2016) Piled raft design strategies for high rise buildings. Geotech Geol Eng 34(1):75 CrossRef Rabiei M, Janalizadeh Choobbasti A (2016) Piled raft design strategies for high rise buildings. Geotech Geol Eng 34(1):75 CrossRef

12.

go back to reference TC18 (2001) Methods of analysis of piled raft foundations. A report prepared on behalf of technical committee on piled foundations, international society of soil mechanics and geotechnical engineering TC18 (2001) Methods of analysis of piled raft foundations. A report prepared on behalf of technical committee on piled foundations, international society of soil mechanics and geotechnical engineering

Title: Economic design optimization of piled raft foundations
Authors:: Meisam Rabiei
Asskar Janalizadeh Choobbasti
Publication date: 01-12-2018
DOI: https://doi.org/10.1007/s41062-018-0170-3
Publisher: Springer International Publishing
Journal: Innovative Infrastructure Solutions
Issue 1/2018
Print ISSN: 2364-4176
Electronic ISSN: 2364-4184