Thursday 14 July 2011

Piling into brown fields

the drainage connected to the buildings stays in place as the ground settles exposing once flush gulleys
Building and ground part company as voids form between ground and undersides of ground floors
  Horizontal fissures forming over d.p.c.'s as brickwork bows and arches
Brickwork over d.p.c. sliding out at external corners with stepped cracking below


Fissures running between window and door openings in brickwork

 
Near vertical cracking close to corners
Dry lining being torn apart as the masonry fractures
Building over deep landfill can be perilous.

If the piles work, the buildings stay up as the roads paths and gardens settle.

Long piles can settle and deflect unevenly causing enough differential movements to crack rigid superstructures, jamb doors and windows and tear internal wall linings.

Adding to this site's troubles, brickwork without any movement control joints adds another cause of cracking.
extensions on conventional concrete rafts float away with the sinking ground tearing themselves off the piled buildings

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