Ground anchors and anchored systems
Federal Highway Administration US (FHWA).
“This document presents state-of-the-practice information on the design and installation of cementgrouted ground anchors and anchored systems for highway applications. Anchored systemsdiscussed include flexible anchored walls, slopes supported using ground anchors, landslide stabilization systems, and structures that incorporate tiedown anchors…”.
“The new concept of installing a multiple of unit anchors in single bore hole has allowed a considerable increase in anchor capacities in soils and weak rocks. Fixed anchor lengths as much as 30m long can now be efficiently utilised to achieve failure loads of 2000 to 3000kN in clays. Where circumstances demand, the anchors can be double protected for permanent works, or for temporary works the steel tendons can be fully withdrawn after use…”.
Ground Anchors – maintenance and inspection
Interesting presentation about SBMA ground anchors, by Dr Devon Mothersille. It includes some impressive pics!
Ground anchors inspector’s manual
NEW YORK STATE DEPARTMENT OF TRANSPORTATION.
“The purpose of this manual is to provide the inspector and Engineer-In-Charge with a quick and easy-to-use set of inspection guidelines for the various aspects of tieback construction, including pre-installation inspection, installation, testing and trouble shooting load cell problems…”.
Recent advances in ground anchor and ground reinforcement technology
Anthony D. Barley and Chris R. Windsor.
The recent advances in ground anchor technology and the related techniques of cable bolting and rock bolting are reviewed. Collectively the technology associated with the three techniques enable design engineers to address stability problems over a range of scales and in a range of geomechanical environments. The techniques have similar aims but have developed into separate disciplines with unique attributes. The procedures for designing and creating ground anchors that meet the stringent requirements associated with modern civil infrastructure are discussed. This contrasts the very different design approaches being developed in rock bolting and cable bolting where standards are less exacting but the design problems can sometimes be more complex…”.