9:00–10:43 pm, completion of culvert installation

Tru-Line Civil Logo. Brands for New Zealand companies, Greymouth, New Zealand.Immediately after the final upstream section of culvert was placed at 9:10 pm, the 6 x high-tension steel threaded rebars were completely pushed through the 10.5m culvert. The multi-thread 80 ton post-tensioning of the culvert was executed using a Hydraulic Steel Rebar Tensioner. The task of tensioning the first tierod got underway just before 9:30 pm.

While 80 ton of tension is applied to the high-tensile steel threaded rebar, the tension is taken up by manually tightening the rebar lock nut. The multiple rebar threads are tightened in a sequence akin to refitting a wheel when fixing a flat tyre.

While 80 ton of tension is applied to the high-tensile steel threaded rebar by a hydraulic tensioner, the tension is taken up by manually tightening the rebar lock nut. The multiple rebar threads are tightened in a sequence around the culvert, akin to refitting a wheel when fixing a flat tyre.

Placement and affixing of the two downstream wing walls

2128_East_Wingwall_crane-8868_2

Craning the downstream eastern wing wall into position.

At the same time as the multi-threads were being post-tensioned, the balance of the TruLine crew completed the placement, joining and reinforced concreting in place of the two wing walls at the northern end of the culvert. This task got underway at 9:28 pm and was completed with the affixing of the two wing wall’s temporary prop at 10:45 pm. This event marked the end of the culvert install task.

The penultimate task. Filling the western wing wall joint boxing with concrete the old fashioned way.

The penultimate task. Filling the western wing wall joint boxing with concrete the old fashioned way.

Backfilling

After a 30 minute smoko, including a generous slap-up barbecue accompanied by lashings of hot food delivered to the site, backfilling the trench got underway. The trench was filled evenly on each side up to the level of the top of the culvert, care was taken to not disturb the box culvert alignment. Fill was done in well-compacted layers of AP65 with the layers not exceeding 30cm. The compacted haunching extended 1m either side of the culvert at the invert, and this fanned out progressively wider as the fill came up to 1.2m over the the 2.4m square box culvert. Then to finish 600mm of railway ballast was laid up to the rail level, at which point the trench was completely backfilled. The backfill was matched to existing ground condtions and extended out to the end of the North Side wing walls. The box culvert installation job was complete when the rail was lifted, levelled and reinstated.

9:00–10:43 pm, culvert install complete, ready for backfill


Description


Project name: Tru-Line Civil Website case studies portfolio
Client (Industry):
TruLine Civil (Construction/Contracting)
Discipline: Documentary photography / Corporate communications design / Infographics  / Technical writing / Web content management
Format: Website / Case Studies / Methodologies
Location: Mingha Bluff SH73, Arthurs Pass, New Zealand
Date: July 2016


Credits


Design firm: MagentaDot Brands
Photographer: Shaun Waugh
Client: Tru-Line Civil


Category:
Photography, Copywriting, technical writing, Web content management, construction contracting, documentary photography, Web graphic design, Web page
Tags:
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