Progress report on St Martins Road and Sandplace Road works

Progress report on St Martins Road and Sandplace Road works

Progress update - 15 January 2013

St Martins Hill Looe

Slope failure

Programme of works

Lower section of failed slope Higher section showing

signs of imminent failure

CORMAC

Solutions Ltd and CORMAC

Contracting Ltd, Head Office, Castle Canyke Road,

Bodmin, Cornwall PL31 1DZ

Tel: 0300 1234 222

Email: customerrelations@cormacltd.co.uk

www.cornwall.gov.uk/cormac

32351 01/13

Post Christmas works

2 January to 4 February

•

Rock anchoring higher section

•

Relocation of WPD pole and overhead line to lower slip area

•

Excavation of lower slip and adjacent substandard wall (towards

junction area)

•

Rock anchoring lower slip failure

•

Spray concreting lower slip failure

4 February to 4 March

•

Micro piling in carriageway from higher section to lower slip area

•

Foundation for stone walling to lower section

•

Stonework to lower section

4 March to 28 March

•

Finish stonework

•

Kerbing

•

Resurface St Martins nearside carriageway

If you wish to report a problem please telephone our highways staff

who will be able to deal with your enquiry on 0300 1234 222.

Following a significant failure of the embankment

approximately 20 metres from the junction of

St Martins Hill and Sandplace Road that

undermined sections of the carriageway, Cornwall

Council took the decision to close Sandplace

Road and operate traffic lights on St Martins Hill.

Higher Section of St Martins Hill (Stage 1)

A series of micro piles will be installed in the affected area that will provide

permanent stability to the affected ground.

Higher Section of St Martins Hill (Stage 2)

Tension Crack

Micro

Rock

Soil

Remove any

loose surface

Parapet

Higher Section of St Martins Hill (Stage 1)

Work carried out to date

The tree and vegetation clearance of the entire embankment

area was completed at the beginning of January and the first

coat of spray concrete applied to the lower slip area.

During January will see the spray concreting process continue

with further coats being applied with steel mesh to form a

robust concrete repair system. Once this is completed and

adequately cured, we hope to be able to start soil nailing the

lower slip area, weather permitting.

The post Christmas works have continued with the micro piling downhill

from the upper section (20no).

Western Power Distribution completed the overhead electric cable and

pole diversion works.

The lower slip area and adjacent failing wall was also trimmed/excavated

in preparation for spray concreting, and the recent slip over Christmas

was cleared from Sandplace Road.

Our designers are working on a design solution for the upper

slip area which has been complicated by the recent additional

landslip which has undermined the concrete edge beam

along St Martins Hill.

We will be carrying out further inspections of the cracking

along Sandplace Road this week to assess what further works

are required.

At present all the works are on programme as initially advised.