Client: Cherry Orchards Camphill Community
Engineer: M.A Howard Associates
Main Contractor: Ken Biggs Contractors Ltd

Requirements 

To ensure the stability and carryout repairs of a natural stone retaining wall by rebuilding/repointing decayed sections, and installing duckbill ground anchors to provide lateral restraint.

M.A Howard Associates established the most efficient cost-effective design to avoid disruption of the access road and the avoidance of a major civil engineering contract.

Installation

A level access road was excavated 3 metres from the wall to establish a safe working platform for the mobile access lift. Anchor access pockets were formed in the wall as indicated by the Engineer and MR-2 stainless steel Duckbill ground anchors were driven through metal plates and into the embankment to a depth of 5 to 6 metres with a 5 tonne 360 slew excavator. They were then proof loaded to a minimum of 60 KN and set to a working load of 40 KN.

The speed of installation of the well proven Duckbills provided an efficient cost-effective method of lateral restraint with the additional benefit of being environmentally friendly.

The stone wall was then repaired and pointed to leave in a sound condition.

On completion the field was returned to its natural condition, all works being to the client’s satisfaction and with no disruption to the access road above during the course of the works.