SH1 PORIRUA TO JOHNSONVILLE - WELLINGTON

Client: Downer

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Location: Wellington

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Service: SH1 Porirua to Johnsonville - Waka Kotahi NZ Transport Agency

 

Date started: August 2021

Date completed: December 2021

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Challenges

Downer needed to install 6km of ducting for the installation of new ITS infrastructure including new LCS, VMSS, Camera, Loop Vehicle Detection and underlying communications/power infrastructure.

They decided to use Marais Laying NZ’s services to trench along SH1.

Trenching had to be performed at night with one traffic lane closure and the client wanted a narrow trench – 650 x 150mm.

The ground conditions were expected to be difficult, therefore we decided to use one of our rock saws.​

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Solution

Marais Laying NZ proposed using a rock saw named Tesmec TRS300 to increase productivity and reduce its footprint due to hard ground conditions.

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Result

This project allowed the company to introduce a new range of solutions for the installation of ITS underground services in busy areas, while keeping the timeframe shorter and leaving a smaller footprint than previous existing techniques.

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Key fact:

• +120m per night trenched in berm and asphalt shoulder

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Key equipment used:

• Tesmec TRS300