Fourth Avenue, York.
Continuous masonry beams and crack stitches were installed at first floor and ground levels.
To ensure that the masonry was continuous, the reinforcement was carried in the dividing alleyways.
The location of the Heli Pile positions is determined by the design, and takes into account the load distribution of the structure. 500mm X 500mm pockets are formed to enable the installation of the Heli Piles.
The manageable size of the pile driving equipment allows for easy mobility. This means that Heli Piles can be driven in restricted locations with minimal disruption. In this instance between the floor joists and at the party wall location.
Tensile proof tests are carried out in each pile after every length driven to ensure that the load criteria is achieved. In this particular case, the piles were driven until a load in excess of 50kN on perimeter walls and 30kN on all other walls was achieved.
Following proof testing, the piles are connected to the substructure using stainless steel reinforcement. Concrete pile caps are cast at the top of the pile.
Substantial internal and external cracking was evident to this 4 house block of council owned properties. The cause of the cracking had been attributed to the tree root influence on shrinkable clay. Severe internal cracking was also evident and masonry beaming and piling was preferred because it is both fast and clean. The contract took only 3-4 weeks to complete.
This project was added to our site on 20 February 2006 and is currently filed under Structural Stabilisation .