Location
Chicago, Illinois
Date
02 May 2013, 2:00 pm - 3:30 pm
Abstract
For the structures supported on soft soils, piled raft foundations have been shown to be more economical than conventional piled foundations. In piled raft foundations, the bearing capacity of the underlying soil is taken into account to support the superstructure loads and the piles are placed such that they increase the bearing capacity of the raft and control both the total and differential settlements of the superstructure. In the city of Kerman, Iran, the predominance of soft soils had historically hampered the construction of high-rise buildings across the city. Recently, an eighteen-story reinforced concrete building was constructed on a micropiled-raft foundation which was placed on a 30 m-thick layer of soft saturated calcareous silty soil. Conventional laboratory and plate loading test results on the foundation soil indicated that a raft foundation would have adequate bearing capacity, but would experience excessive settlements. As a remedial solution, a micropiled-raft foundation system was considered as a design option for the foundation of the structure. A prototype micropile was designed and installed based on the FHWA (2000) guidelines and tested at the site. The test results were used to design the micropiled raft foundation using a finite element program. The results of the analysis showed that micropiled-raft foundations can provide a cost-effective engineering solution for high-rise buildings constructed on soft soils. The results of this study were successfully employed to construct additional high-rise buildings in the city.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
7th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2013 Missouri University of Science and Technology, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Yazdani, Hessam; Momeni, Mehdi; and Hatami, Kianoosh, "Micropiled-Raft Foundations for High-Rise Buildings on Soft Soils — A Case Study: Kerman, Iran" (2013). International Conference on Case Histories in Geotechnical Engineering. 21.
https://scholarsmine.mst.edu/icchge/7icchge/session02/21
Micropiled-Raft Foundations for High-Rise Buildings on Soft Soils — A Case Study: Kerman, Iran
Chicago, Illinois
For the structures supported on soft soils, piled raft foundations have been shown to be more economical than conventional piled foundations. In piled raft foundations, the bearing capacity of the underlying soil is taken into account to support the superstructure loads and the piles are placed such that they increase the bearing capacity of the raft and control both the total and differential settlements of the superstructure. In the city of Kerman, Iran, the predominance of soft soils had historically hampered the construction of high-rise buildings across the city. Recently, an eighteen-story reinforced concrete building was constructed on a micropiled-raft foundation which was placed on a 30 m-thick layer of soft saturated calcareous silty soil. Conventional laboratory and plate loading test results on the foundation soil indicated that a raft foundation would have adequate bearing capacity, but would experience excessive settlements. As a remedial solution, a micropiled-raft foundation system was considered as a design option for the foundation of the structure. A prototype micropile was designed and installed based on the FHWA (2000) guidelines and tested at the site. The test results were used to design the micropiled raft foundation using a finite element program. The results of the analysis showed that micropiled-raft foundations can provide a cost-effective engineering solution for high-rise buildings constructed on soft soils. The results of this study were successfully employed to construct additional high-rise buildings in the city.
