| 摘要 |
The invention is a rock bolt for being grouted in a borehole, said rock b olt comprising:- an elongate cylindrical massive stem (1) comprising extensi ve lengths of stem portions (1s) separated by integrated anchors (2) distrib uted with separations (L3) along the length of said stem (1), - said anchors (2) for being locally anchored relative to their local borehole wall portio ns for taking up load arising due to rock deformation, - said stem portions (1s) arranged for slipping relative to the grout or the borehole, so as for each of said stems (1s) to take up local elongation strain between pairs of a locally anchored preceding anchor (2a, 2b,...) and a locally anchored cons ecutive anchor (2b, 2c,...).
|
