Masonry culvert replacement near Orange

 

Client: John Holland – Country Regional Network

Project: Replacement of masonry culvert with RCB culvert - near Orange, NSW

Description: Replace existing masonry culvert with a double-cell precast culvert with associated wing walls, apron slabs and scour protection.

Barnson’s Role: Provide on-site geotechnical advice and testing for foundation bearing capacities, material moisture and compaction under the pre-cast culverts and backfill behind the wing walls in the rail structural zone and capping layers.

Time frameCompleted September 2016

 
 
John Holland Country Regional Network is upgrading the existing rail infrastructure to accommodate an upgrade to the nearby road and general area drainage. The existing masonry culvert was concrete filled, with pre-cast culverts placed adjacent to allowed for a road widening. 
 
The rail was removed and area boxed out to a depth 0.3m deeper than the culvert base. A further 0.3m of structural fill was placed and compacted before the pre-cast culverts were put in place. The culverts and wings were craned before backfilling the structural zone and capping layers.

Train networks are busy public transport route and it's important to avoid disruption as far as possible. This project had a short window of 36 hours to be carried out between 6am Saturday morning to 6pm Sunday - in this time the rail had to be in place and operational for the train network to continue.

This project required day and night shift personnel with the ability and experience to assist in material analysis and compaction technique recommendations. This was achieved by making available and supplying two personnel with over 8 years’ experience each.

Barnson dealt with the challenge of engaging both day and night shift personnel with the ability and experience to assist in material analysis and compaction technique recommendations. We relied on the input of two staff with more than eight years of experience each. With the qualified personnel on site, the time frame was achieved and the rail was ready for use by the deadline.