Challenging ground conditions have necessitated the extensive waterproofing of anchor boreholes and this has resulted in delays to the overall construction programme at Hazelmere dam. Despite this, progress is being made, and at the time of writing all 83 anchor boreholes have been drilled and 40 of the scheduled 83 anchors have been stressed, tested and locked-off.
AnchorTest used to assess anchor load/extension data in real-time during the testing of an anchor located in the spillway of the dam
Injection of corrosion inhibiting compound beneath the stressing head of an 80 strand spillway anchor.
Deep Foundations magazine published by DFI (Deep Foundations Institute) enjoys an extensive worldwide readership and has recently published a five-page article featuring AnchorTest. The article includes the latest case history updates from around the globe where AnchorTest has been used for real-time testing and data management on challenging ground anchor projects. The September/October 2017 issue featuring AnchorTest can be viewed at http://dfi.dcatalog.com/v/September-October 2017/#page=65.
Geoserve Global Ltd will employ drone technology to assist with the inspection of anchor heads in circumstances where anchor heads are positioned in challenging locations. Please look out for future web postings that will show aerial photographs and video footage of the spillway at Hazelmere dam.
Dr Devon Mothersille controls the drone in preparation for future usage at Hazelmere dam
Back in December 2012 Dr Devon Mothersille presented a paper to an audience at the headquarters of the Construction Industry Research and Information Association (CIRIA) in London. Interestingly, the paper, entitled, ‘Aged ground anchors and soil nails’ has only recently been published by CIRIA in the proceedings of the fifth conference on ‘Geotechnical Issues in Construction’ held on 3rd December 2012.
Amongst other things, the paper identifies the ground conditions that accentuate corrosion risk and uses case history evidence to illustrate severe corrosive degradation in anchor and soil nail heads.
Outstanding Geotechnical Engineer and Researcher, Dr Antonio Marinucci will act as marketing agent for the AnchorTest software package (configured for iPads; www.anchortest.info) and SBMA technology in the US and Canada. Dr Marinucci is also a recently inducted member of the Geo-Trust network.
Dr Marinucci and Dr Mothersille seal the deal in Honolulu, Hawaii
Some of the geotechnical engineering specialists, forming part of the Geo-Trust collective, took advantage of their attendance at the 5th international grouting conference to convene a group meeting. The group discussed current workloads, interesting developments and future collaborations.
From right to left: Dr Antonia Marinucci, Dr Devon Mothersille, Dr Donald Bruce, Mr Max Bruce (Donald’s son), Dr Trevor Carter, Professor Stefan Jefferies, Dr David Yang
Dr Devon Mothersille presented a paper entitled ‘Overcoming the challenges of grouting ultra-high capacity anchors dam in jointed quarzitic sandstone’ at the 5th International Grouting Conference, held between 9th-12th July 2017 in beautiful Honolulu, Hawaii. Over a four day period the well-attended conference provided three keynote lectures and technical sessions covering a broad spectrum of subjects including grouting case histories, drilling/grouting and deep mixing/ diaphragm walls.
Dr Mothersille during his presentation within the technical session on Drilling and Grouting