WTC2022 | Reliability Analysis of Early Age Concrete Liner Subjected to Blast Vibrations

Copenhagen, Denmark
September 02 - 08, 2022, 09:00 AM - 06:00 PM GTM+2
Tunnel in Argentina

Tunnel in Argentina

Other

Other

September 02 - 08, 2022
09:00 AM - 06:00 PM GTM+2
This paper presents a method to assess the probability of cracking in early age concrete liners subject to blasting vibration that allows for the optimization of construction time while ensuring an adequate performance.

 

Paper Presentation

Authors: Alejo Sfriso, Graham Howell, P. Barbieri

 

Abstract

Early age concrete has a limited resistance to vibrations, and lasting implications for the entire lifetime of the liner occur when this resistance is exceeded. 

This paper presents a method to assess the probability of cracking in early age concrete liners subject to blasting vibration that allows for the optimization of construction time while ensuring an adequate performance. 

The method is based on a Monte Carlo simulation of the evolution of the concrete resistance with time as a function of the mix and environmental variables such as concrete temperature. The probability of cracking is assessed by comparing the age-dependent resistance to the expected dynamic excitation. 

The method also highlights key variables in the design and construction planning of concrete liners for improved cost savings and overall structural reliability.

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Alejo Oscar Sfriso | Geotechnical Mining Engineer, Director | SRK Argentina

Alejo Sfriso

Group Chair, Corporate Consultant (Geotechnical Engineering)

Alejo is expert in the application of numerical methods to the design, analysis and risk evaluation of geotechnical structures, with emphasis in construction procedures.

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Graham Howell | Corporate Consultant (Structural and Geotechnical Engineering) | Johannesburg, South Africa

Graham Howell

Corporate Consultant (Structural and Geotechnical Engineering)

Graham has over 40 years of experience in geotechnical and structural engineering connected with most principal sectors of civil, mining and environmental engineering including tailings design and management.

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