Drilling in Christchurch

Twice in the last two years, we were booked to come and stabilize cliffs around Christchurch when another earthquake brought more damage and obliged to reassess the plans.

At last, we were called by a large local abseiling company, who has been granted the contract by Fulton Hogan despite no previous experience in drilling. At McCormick reservoirs in Sumner, the initial design, a self-drilling system, didn’t work for 2 weeks until I managed to convince everybody that an open hole strategy had to be deployed.

We’ve seen in Christchurch recovery other occurrences of drilling companies called on abseiling works and abseiling companies specialized in cleaning windows attempting geotechnical jobs. What a waste of time and ratepayer money…

Conclusion:  Always ask the experts and experienced first!

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Photos (c) DAS

Drilling at home!

Creating two lines of concrete piles close to a building to enable safe foundations for a new construction, right on the lake front in Wanaka.

Using our new multishank rotopercussion unit , we have drilled 80 holes  1.20 meters deep and used thick grouts as a flushing medium.

    

Drill on Wanaka Lake front

French visitor

Thanks for your help Benoit ; Good drilling in New Caledonia!
Thanks for your expertise, Benoit ; Good drilling in New Caledonia!

During 3 weeks, we had the pleasure to share Ben’s experience, six years team leader at Ouest Acro (French leading abseiling company), on our last work : 150square meter mesh installation and rock bolting. Ben took the chance to go to THE Match… and we have not heard of him since!

Drilling
Drilling

Nevis Bluff: successful and in due time!

Access and safety 

Climbing up to the workplace,credit J Barbour (c) DAS
Climbing up to the workplace, credit J Barbour (c) DAS

Installing the antirockfall barrier before start (c) DAS
Installing the antirockfall barrier before start (c) DAS

With our previous references on the same cliff, we succeeded on that tender. A team of four of us equipped in two weeks an access on that remote part of the Nevis Bluff. From the top first. Then with Heliworks delivery, we were able to built a rock fall barrier above the area to be worked on. The installation of 120m of ladders and steps bridges allowed Fulton Hogan team and ours to gain access every morning, using a double fixed line system. For the following 5 weeks: hand drilling, blasting, hand scaling and helicopter watersluicing composed the program. Thanks to our ability and abseiling  skills, Drilling & Abseil Services has been a successful part of the operations involving helicopters, heavy traffic management and work at height. 

 Rock Bolting

Rock bolting after rock removal,credit Dave McKinney (c) DAS
Rock bolting after rock removal, credit Dave McKinney (c) DAS
Nevis Bluff, Queenstown side (c) DAS
Nevis Bluff, Queenstown side (c) DAS