Date
03 Jun 1988, 10:00 am - 5:30 pm
Abstract
Five floors were added to a six storey building during its construction without carrying out necessary structural calculations. When such calculations were later performed they revealed that both the spread footing foundation and many columns were unsafe. The contact pressure beneath footings exceeded the allowable soil pressure. The repair method described in this paper depended on disregarding the spread footing foundation and constructing a new deep foundation system for the existing building. This consisted of end bearing bored piles drilled and cast in the voids between the footings using a special low rise rig. The piles were connected to a rigid reinforced concrete raft located above the footings. The raft in turn was connected to the ground floor columns by means of reinforced concrete jackets. Unsafe columns were repaired using reinforced concrete jackets. Settlement observations were carried out for a sufficient period of time after repair with additionally applied test loads which showed satisfactory results.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
2nd Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1988 University of Missouri--Rolla, 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
Abdel-Salam, Sayed and Mashhour, Mohsen, "Repair and Rehabilitation of a Residential Building at Nile River in Cairo" (1988). International Conference on Case Histories in Geotechnical Engineering. 48.
https://scholarsmine.mst.edu/icchge/2icchge/2icchge-session6/48
Repair and Rehabilitation of a Residential Building at Nile River in Cairo
Five floors were added to a six storey building during its construction without carrying out necessary structural calculations. When such calculations were later performed they revealed that both the spread footing foundation and many columns were unsafe. The contact pressure beneath footings exceeded the allowable soil pressure. The repair method described in this paper depended on disregarding the spread footing foundation and constructing a new deep foundation system for the existing building. This consisted of end bearing bored piles drilled and cast in the voids between the footings using a special low rise rig. The piles were connected to a rigid reinforced concrete raft located above the footings. The raft in turn was connected to the ground floor columns by means of reinforced concrete jackets. Unsafe columns were repaired using reinforced concrete jackets. Settlement observations were carried out for a sufficient period of time after repair with additionally applied test loads which showed satisfactory results.
