LOAD TRANSFER IN PRESSURE INJECTED ANCHORS-CLOSURE

This paper is a closure written by the original authors in response to a discussion of their paper concerning anchor movements. The writers agree with the discusser that elastic theory is a useful tool in the investigation of tieback anchor behavior; however, they feel than an analysis that includes the interaction between anchor elongation and strains in the adjacent soil, such as the Mindlin equation approach of Mattes and Poulos or a finite element analysis, is more appropriate for this particular type of anchor because of the very high slenderness ratios, L/d, of typical-pressure-injected anchors. With reference to the computations presented by the discusser, the writers point out that a composite anchor modulus is used in the computations whereas a cracked grout section would appear to be more correct. With respect to the selection of soil moduli for the discusser's computations, it is noted that the stress-strain response of the soil in a relatively thin zone adjacent to the anchor has a major influence of the anchor response. Increased confining pressures due to the high radial stresses induced in the soil around pressure-injected anchors could significantly increase the soil modulus in this zone.

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  • Accession Number: 00319163
  • Record Type: Publication
  • Report/Paper Numbers: ASCE 14035
  • Files: TRIS
  • Created Date: Jan 19 1981 12:00AM