Slipform Concrete Barrier

Kerbing West has been slipforming since June 1998 and has completed major projects including the Northbridge Tunnel for the Baulderstone Clough Joint Venture. On this project a barrier was completed inside the tunnel as well as associated approach road safety barrier. The barrier inside the tunnel was slipformed against a nofines concrete wall. The barrier width was 290mm on the base, 105mm on the top and 965mm tall. Surveyors gave readings every 5 metres which allowed levels to be set independent from the roof or floor. Variable side plates were used to ensure level continuity.

This project also required a free standing median barrier leading in to and out of the tunnel.

The Gomaco Commander III owned by Kerbing West is able to be in a 3 track or 4 track mode during the process of slipforming concrete barrier. This enables us to slipform any type of height of barrier to a maximum height of 2 metres. The machine can also slipform in excess of 200 metres of median barrier per day. Of course, the type of barrier and the dimensions of the barrier determine the amount that can be slipformed daily.

Re-inforcement may be used when forming a concrete barrier and this may be either a re-bar cage or steel cables. Kerbing West has used both types of re-inforcing successfully during projects. Horizontal conduit pipes are also used to carry utilities and are very easily slipformed over.

Whilst working on the duplication of the Narrows Bridge, the buslane barrier was slip-formed over foam inserts which were then chemically removed to provide drainage entries.

Freeway lighting if often incorporated in median concrete barriers. Kerbing West competently completed lightstand installations in the aforementioned project.

All concrete barrier moulds are manufactured by Kerbing West at their premises in Malaga, WA. Existing moulds may be adjusted by their onsite fitter, who also is fully mobile and competent at meeting any needs the machine may require to ensure breakdowns etc. do not delay projects.

Kerbing West is professionally capable of completing any project that takes the form of Slipform Concrete Barrier.

Slip Form Barrier Narrows Bridge Buslane WA

Central median barrier showing cable re-inforcement and utilities conduit

Slipform Concrete Slot Drains

Slot drains combine the surface collection system with the carrier pipe.

This type of slipformed drainage system can rapidly receive and channel liquid away from pavement surfaces.

It is considerably less wide than the equivalent open channel drain, and when combined with a vertical concrete barrier in the central reserve, the overall width of the central reserve can be minimised, therefore the land required for any freeway or highway may be greatly reduced.

There are many applications for Slipformed Conrete Drains which included:

Freeways and highways
Dedicated carriageways (eq. Parking lots)
Airports
Agricultural
Sporting venues
Municipal roads
Commercial and Industrial pavements

Only slight dishing towards the slot is require in the surface profile, which makes the slipformed concrete drain less hazardous for vehicles than an open channel drain with a 1 in 5 transverse surface slope.

The slotted drain avoids collecting rubbish in the drainage system as the liquid entry to the drain is through a 2-5cm slot.

Slipforming slot drains also allow greater lengths of drain to be laid each day, to expedite the project.

Slipforming of slot drains can be un-reinforced or reinforced by way of steel mesh depending on whether the drain is in an area of high load or not.

Barrier wall can be slipformed directly on the slotted drain. Maximum drainage efficiency is retain whilst utilising all the pavement to the edge of the wall.

Slipform Concrete Bridge Parapets

Slipforming bridge parapets are standard applications for Kerbing West's slipform paver in either 3 or 4 track mode over grade variations or bridge decking. The parapet mould is side mounted to accommodate minimum clearance requirements often found on bridge applications. parapets can be run in either direction and up to 1.96 meters in height. They can be slipformed over reinforcement and /or conduits to meet most power supply and structural requirements.

Bridge Parapets Wall for Barclay Mowlern

Profiles can be formed to match most standard precast parapets in existance. The slipforming procedure produces a clean radius blending into the bridge aesthetics and eliminating the angular, sectional finish associated with precast parapets. Recent projects, including the Baulderstone Clough Joint Venture, Northbridge Tunnel fly over ramps to the Mitchell Freeway and Barclay Mowlems, Wellington Street ramps are examples of slipform parapets that can be utilised to meet most bridage or ramp containment in line with Australian Bridge Design Standards.

This method of bridge parapet construction has been used throughout U.K., Europe and U.S.A. as well as the east coast of Australia over the past years.

Slipforming Over Reinforcement