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Slope Stabilisation

Slope Stabilisation. Cobh, County Cork

Contract Details

Cumnor Construction Ltd. carried out the role of Works Contractor and PSCS for this project.

New reinforced concrete retaining walls were constructed in various locations throughout Cobh. These retaining walls were then clad with natural stone. Remedial work to other masonry walls was also carried out. This included removal of vegetation and existing deteriorated pointing. Repointing was carried out and sections of the retaining walls were rebuilt. Much of this work required netting and underpinning. Tie bars were drilled through the existing walls and grouted to further support these old masonry walls.

A new earth embankment was designed and constructed. This embankment was built directly behind existing houses. The work area was extremely restricted with special equipment required to carry out the project.

Soft and hard landscaping work was completed. Existing damaged footpaths were removed and replaced with new concrete reinforced footpaths. A new road drainage system was installed.

Detailed traffic management plans were implemented. All roads remained open while the work was being completed. Adequate signage and traffic controls were implemented in co-ordination with Cobh Town Council, Cork County Council and An Garda Síochána.

 

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Contract:

Slope Landslide & Stabilisation. Cobh, County Cork

Client: Cobh Town Council
Year: 

Cliff Stabilisation. Ardmore, County Waterford

Contract Details

Cumnor Construction Ltd. carried out the role of Works Contractor and PSCS for this project.

This contract required specialised work involving the installation of soil nails/ground anchors and the application of spray applied concrete to the cliff walls and slopes.

Environmental control procedures were implemented so as not to contaminate the sea water. A temporary platform had to be constructed to a level above the highest tide while the work was being completed. This was constructed using Rock Armour and netting. The existing slope face was cleared of all vegetation and loose material. The face of the slope was cut back and graded for the full height so that the toe of the shotcrete rested on the rock and was supported for its full height by the rock. Runoff from grouting and shotcreting was prevented from entering the water.

53 self-drilling hollow bar soil nail anchors were installed and proof tested.  Drainage was required to the cliff front face behind the shotcrete. Additional drainage to the body of the cliff soil required drilling into the cliff face and installation of PVC drains. Shotcrete was applied to the cliff face and was coloured to help blend into the surrounding cliff.  The shotcrete was reinforced in its centre using two layers of 2.4mm galvanised triple twist wire mesh.

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Contract:

Ardmore Cliff Failure Remediation Work. Ardmore, County Waterford

Client: Waterford County Council
Year: 

Seawall Stabilisation. Youghal, County Cork

Contract Details

Cumnor Construction Ltd carried out the role of Works Contractor and PSCS for this project.

The work consisted of embankment reconstruction, netting, shotcreting, soil nailing and installing ground anchors as well as the construction of reinforced concrete retaining walls and gabion retaining walls. Soil nails were installed to reinforce the sea wall. A reinforced concrete retaining wall was constructed at the base of the wall and anchored into the rock using ground anchors. These soil nails/ anchors were grouted and tested. Records of these results were tabulated and submitted to the client. A large steel frame was constructed to the seawall, bolted on concrete reinforced pads, and anchored into the rock.

All of this work was scheduled to coincide with low tides. A safe means of access to the base of the wall had to be provided as the waters encroached onto the working area at high tide.

The area was environmentally sensitive. Adequate protection measures were put in place during the construction period.

Traffic Management measures were place for the duration of the works.   Access points maintained to private dwellings. The traffic management plans were drafted and submitted to Cork County Council and An Garda Síochána prior to works commencing.

 

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Contract:

Permanent Stabilisation Work to the Seawall. Youghal, County Cork.

Client: Cork County Council
Year: 

Cliff Stabilisation. Arthurstown, County Wexford

Contract Details

Cumnor Construction Ltd. carried out the role of Works Contractor and PSCS for this project.

The contract involved the stabilisation of cliffs using netting, shotcreting horizontal drainage systems and the installation of 142 Soil Nails. A concrete toe was installed at the base of the shotcrete in order to support the shotcrete above.

The works were located below, within and immediately adjacent to the inter-tidal zone. A safe working platform was specifically designed and built to cater for tidal effects. The existing cliff face was cleared of all vegetation and removed off site . Great care was taken to ensure the waters below were not contaminated.

Traffic management measures were designed in-house and implemented in order to undertake the work.

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Contract:

Cliff Stabilisation Work. Arthurstown, County Wexford

Client: Wexford County Council
Year: 

Embankment Stabilisation. Clyda Road, County Cork

Contract Details

Cumnor Construction Ltd. carried out the role of Works Contractor and PSCS for this project.

The contract comprised of the stabilisation of an embankment. A total of 135 Soil Nails were installed and grouted into the embankment. Remedial works were carried out to an existing stone wall. This work included installing new foundations and rebuilding the wall. Other sections of the wall were repaired, rebuilt and repointed as required. The road was resurfaced. Rotting trees were removed from the embankment. General vegetation clearance of the area was also carried out. Environmental measures were implemented to ensure that the River Clyda was protected from pollution whilst the work were being completed.

Traffic management measures were in place throughout the contract duration. These measures were designed in-house and approved by Cork County Council.

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Contract:

Embankment Stabilisation. Clyda Road, County Cork

Client: Cork County Council
Year: 

The Viaduct Bar Carpark Stabilisation. County Cork

Contract Details

Cumnor Construction Ltd. carried out the role of Works Contractor and PSCS for this project.

The project involved the installation of stone filled gabion retaining wall baskets over a length of 95m to protect an embankment previously damaged by a flooding event.

The works were carried out within a busy car park. The existing watercourse was diverted for the duration of the works in liaison with the Inland Fisheries and local authorities. The water bed was prepared for installation of Gabion Baskets. Stone Filled Gabion Baskets and Reno Mattress Gabion Baskets were installed and formed to match existing profile. Back-filling behind the Gabion Baskets with suitable stone was carried out. Drainage pipework was installed through the newly formed retaining wall as well as a Geotech layer and topsoil was added.

Additional work included the construction of earthen berms, the reinstatement of  tarmac to the car park and the diverting of the water back to its original route.

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Contract:

Gabion Retaining Wall Embankment. The Viaduct Bar, Bandon Road, Co. Cork

Client: The Viaduct Bar
Year: 
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