Case Study 7 Specialist Repairs

Bunbury Churchyard Boundary Wall
 
BDS Consultants services included Structural survey and report, planning and co-ordinating the works including liaison with Church Diocese, the owner of the adjacent cottage, other structural consultants and Crewe & Nantwich Borough Council.
 
church wall
Typical Photos showing the completed section of external wall (shown above) and three examples of work in progress
 
Due to the urgency and unsafe condition of the wall it was necessary to arrange temporary shoring of the wall then design a suitable method of repair that would minimise disturbance to the grave yard which the wall supported. The work consisted of ground anchor system, ground anchor drainage system, ground stabilisation, stainless steel stitching, etc. A 7m long section of this 2.5-3m high boundary wall formed part of the cottage and extended a further 7.3m into the garden area and beyond. Retaining nearly to its full height this 14m long section was leaning over and was in some places 300mm out of vertical. The solution included the local repair of stonework, core drilling and anchor installation. 95mm diameter core holes were cut through the wall on calculated centres before anchors were installed to a driven depth of 5m. Each anchor was then loaded and locked against the wall facing. 5m runs of ‘Passive’ Plati-Drain’ were installed to reduce the pore water pressure from behind the structure. The anchor installation was designed and indemnified through Platipus.