Location
Chicago, Illinois
Date
02 May 2013, 4:00 pm - 6:00 pm
Abstract
The construction of a new underground car park in the historic center of Brescia (Northern Italy) required the execution of a 130m long, 23m wide and 15-20m deep excavation which was supported by concrete multi-anchored diaphragm walls. The site is located between two facing ancient walls (15-16th century) that support 3-4 storey buildings in precarious conditions. The soil stratigraphy comprises a superficial layer of made ground over a clayey to sandy soil deposit supporting a perched water table. A comprehensive monitoring system was set up before construction that included inclinometers, precise leveling and automatic structural monitoring by means of a high-precision total station. A number of finite element numerical analyses were conducted using different constitutive laws for the soil to evaluate the behavior of the retaining structure and safety of adjacent buildings. The simple linear elastic-perfectly plastic constitutive law predicted unrealistic soil behavior and unreliable effects on adjacent structures. The result of numerical analyses performed with soil models that include isotropic hardening with stress and strain stiffness dependency compared well with measurements.
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
Sanzeni, Alex; Colleselli, Francesco; Mino, Moira; and Merlini, Alberto, "Behavior Prediction and Monitoring of a Deep Excavation in the Historic Center of Brescia" (2013). International Conference on Case Histories in Geotechnical Engineering. 5.
https://scholarsmine.mst.edu/icchge/7icchge/session03/5
Behavior Prediction and Monitoring of a Deep Excavation in the Historic Center of Brescia
Chicago, Illinois
The construction of a new underground car park in the historic center of Brescia (Northern Italy) required the execution of a 130m long, 23m wide and 15-20m deep excavation which was supported by concrete multi-anchored diaphragm walls. The site is located between two facing ancient walls (15-16th century) that support 3-4 storey buildings in precarious conditions. The soil stratigraphy comprises a superficial layer of made ground over a clayey to sandy soil deposit supporting a perched water table. A comprehensive monitoring system was set up before construction that included inclinometers, precise leveling and automatic structural monitoring by means of a high-precision total station. A number of finite element numerical analyses were conducted using different constitutive laws for the soil to evaluate the behavior of the retaining structure and safety of adjacent buildings. The simple linear elastic-perfectly plastic constitutive law predicted unrealistic soil behavior and unreliable effects on adjacent structures. The result of numerical analyses performed with soil models that include isotropic hardening with stress and strain stiffness dependency compared well with measurements.
