Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The stress fields in the rock in the immediate vicinities of the ends of prestressed rock bolts are considered. In particular, the tensile stresses that are likely to initiate cracks are studied. A fracture mechanics analysis shows that if cracks are initiated they will normally not be extended more than a few bore hole diameters and cause negligable reduction of the tensile force in the rock bolts. It is suggested that the initiated cracks can be considerably extended by blasting activities in the neighborhood and accordingly cause loss of bolt tension. If so retensioning of the rock bolts is quite meaningless.
The stress fields in the rock in the immediate vicinities of the ends of prestressed rock bolts are considered. In particular, the tensile stresses that are likely to initiate cracks are studied. A fracture mechanics analysis shows that if cracks are initiated they will normally not be extended more than a few bore hole diameters and cause negligable reduction of the tensile force in the rock bolts. It is suggested that the initiated cracks can be considerably extended by blasting activities in the neighborhood and accordingly cause loss of bolt tension. If so retensioning of the rock bolts is quite meaningless.
Crack Initiation Around Prestressed Rock Bolts
G. Wijk (Autor:in)
1982
19 pages
Report
Keine Angabe
Englisch
Corrosion Damage Behavior of Prestressed Rock Bolts under Aggressive Environment
| Online Contents | 2019
Corrosion Damage Behavior of Prestressed Rock Bolts under Aggressive Environment
| Springer Verlag | 2019
| Engineering Index Backfile | 1954
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Behaviour of Bolts in Rock and Testing of Rock Bolts
| NTIS | 1984