Date
03 Jun 1988, 10:30 am - 5:30 pm
Abstract
The first time that the New Austrian Tunnelling Method (NATM) was used for underground works in the Sao Paulo Subway was in 1981. Since that time, significant progress has been achieved in successfully optimizing the support and lowering the construction costs. This paper will describe the latest experience of two single-track parallel tunnels excavated in 1986 through tertiary stiff clay. All the experience accumulated in previous jobs led to design improvements, such as (1) no steel ribs for support along 72% of the tunnels length (2) no temporary invert, and (3) no spiles, forepoles, soil grouting or any other type of ground improvement. Significant cost and time reduction were the practical result. A method for quick and efficient storage and graphical interpretation of instrumentation readings was developed and implemented in a network of microcomputers installed at the construction site, owner's and engineers' offices.
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
Celestino, T. B.; Ferrari, O. A.; Mitsuse, C. T.; and Domingues, L. C., "Progress in the Use of NATM for the São Paulo Subway" (1988). International Conference on Case Histories in Geotechnical Engineering. 29.
https://scholarsmine.mst.edu/icchge/2icchge/icchge-session5/29
Progress in the Use of NATM for the São Paulo Subway
The first time that the New Austrian Tunnelling Method (NATM) was used for underground works in the Sao Paulo Subway was in 1981. Since that time, significant progress has been achieved in successfully optimizing the support and lowering the construction costs. This paper will describe the latest experience of two single-track parallel tunnels excavated in 1986 through tertiary stiff clay. All the experience accumulated in previous jobs led to design improvements, such as (1) no steel ribs for support along 72% of the tunnels length (2) no temporary invert, and (3) no spiles, forepoles, soil grouting or any other type of ground improvement. Significant cost and time reduction were the practical result. A method for quick and efficient storage and graphical interpretation of instrumentation readings was developed and implemented in a network of microcomputers installed at the construction site, owner's and engineers' offices.
