Patent ID: 6571518
Filing Date: 2003-06-03
Classification: E02D,E04C

Abstract:
Ground anchorage comprising a bore in the ground filled with bore grout and a plurality of unit anchorages received in the bore, each unit anchorage comprising a tendon having(a) a bond length which is bonded along the bond length within the bore grout, (b) a free length arranged so that there is substantially no adhesion between the free length and the bore grout, and (c) a gripped length; wherein bond lengths of the respective unit anchorages are anchored in the bore grout in a staggered and spaced relationship along the bore, and wherein at least one of the tendons comprises synthetic polymeric material, the tendon being gripped in the gripped length by a grip arranged to apply compression to the tendon in a direction transverse to the longitudinal direction of the tendon, the compression increasing over the gripped length of the tendon in such a manner that, at no point along its length, is the tendon subjected to shear which is greater than the shear strength of the tendon.