We are currently carrying out a structural inspection and repair to a brick built railway bridge in North London.
Our client expressed concerns over the visible cracking and bowing present to the structure of which carries high speed trains into central London so it was vital that we acted quickly in order to carryout the inspection, design and implement a suitable structural repair scheme.
Bridge-reinforcement
To save time and cost in scaffold we opted to use our van mounted cherry picker that will enable our installation to be carried out rapidly, in less time that it would take to erect scaffolding.
The spandrel is suffering from de-lamination causing in some brickwork to fall from the masonry arch severely weakening the structure. the sofit which carries and distributes the loads of the masonry arch was showing signs of racking caused by vibration allowing water to penetrate into the structure causing defective pointing. the brick pier was also suffering from major cracking and separation.
We will be installing Twistfix helical beams at 300mm centres horizontally accross the masonry arch creating a grid pattern with the bars drilled 1.5m into the supporting pillars providing a reinforced structure distributing the loads. and over 4000 1.5m grout ties will be installed through the sofit into the arch pinning the sofit and preventing further delamination.
the works will be carried out so that the bridge remains fully functional and the road remains open and accessible.
At Newman’s we utilise modern methods of masonry repair to restore bowing walls and lintel failure to name but a few structural defects.
Our specialist services were called upon by a building surveyor managing the refurbishment of a Victorian built 1890’s semi detached house in Croydon, South London.
Bowing Building London
After completing our survey it was discovered that there was extensive outward movement to the front and gable elevations and with the loft conversion in progress the additional stress to the masonry was sure to cause severe movement.
Bed Joint Reinforcement
Over 30 Lateral restraint ties were used on the gable elevation alone into the first floor and the new loft floor to restrain the outward movement combined with bed joint reinforcement ensuring there would be no further outward movement.
Lateral Restraint Ties Installed
With the bed joint reinforcement being installed front the front elevation wrapped around the gable and into the rear elevation the lintel failure was repaired and the bowing restrained.
Works are underway on our latest Structural Repair project in Greenwich, South EastLondon. After completing our detailed structural survey our in house engineers designed a specification to restore the structural integrity of the bay window on this Victorian terrace property. Our specification included the installation of deep bed masonry helical beams, crack stitches and lateral restraint ties together with stone repairs to the window cills and deep bed repointing to large areas of the existing brick work combined with grout injection. All repairs will be covered by our genuine 10 year insurance backed warranty. For further details about this project contact us today.
