NDLI: Dynamically loaded young shotcrete linings

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Dynamically loaded young shotcrete linings

Content Provider	Scilit
Author	Ansell, A. Holmgren, J.
Copyright Year	2020
Description	A criteria for how close, in time and distance, to young shotcrete blasting can take place would be an important tool in planning for safe and economical tunnelling projects. As a first step, field tests with shotcrete at ages of 1 to 25 hours, sprayed on tunnel walls, have been conducted in a Swedish mine. The shotcreted areas were subjected to vibrations from explosive charges detonated inside the rock. The acceleration measurements showed that the shotcrete had withstood high particle velocity vibrations without being seriously damaged. Drumminess of shotcrete appeared, indicating that the major failure mechanism was sudden loss of adhesion to the rock. Elastic wave propagation theory has been implemented numerically to further study the failure mechanism. Due to the changes in shotcrete-rock impedance ratio as the shotcrete cures, the stresses at the interface between shotcrete and rock experience a maximum during a short period within the first 24 hours of shotcrete age. Book Name: Shotcrete: Engineering Developments
Related Links	https://api.taylorfrancis.com/content/chapters/edit/download?identifierName=doi&identifierValue=10.1201/9781003078678-5&type=chapterpdf
Ending Page	40
Page Count	8
Starting Page	33
DOI	10.1201/9781003078678-5
Language	English
Publisher	Informa UK Limited
Publisher Date	2020-12-17
Access Restriction	Open
Subject Keyword	Book Name: Shotcrete: Engineering Developments Criminology and Penology Tunnelling Stresses Shotcrete Rock Failure Mechanism Young Shotcrete Wave Propagation
Content Type	Text
Resource Type	Chapter

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