Stabilisation of the foundation of the fire tower
THE PROBLEM
A regular audit of the real estates by the public authority identified risks associated with an unstable soil layer under a 20m high fire tower. At an depth of 3-5 m, an unstable layer of sand, saturated with sludge, was discovered. Cracks in the walls and geotechnical investigations clearly pointed to problems in the construction of the foundations. The authorities decided to suspend the tower until the foundations of the tower will be reinforced. The most difficult part of the whole project was access to the foundations of the tower, as it is located in the courtyard of the building and can only be accessed through a normal-width door.
WORK PROCESS WITH URETEK TECHNOLOGY
URETEK Baltic specialists strengthened the tower foundations by making 12 vertical injections around the perimeter of the foundation. First of all, injections were made, which strengthened the base of the foundation structure – to create one monolith. In the second stage of injections, the soil layers were stabilized to a depth of -5.2 m to meet the customer’s requirements. Narrow rooms and doors were not an obstacle to carrying out this work inside a building or even in a courtyard where there is no access to heavy transport.
THE RESULT
URETEK work on this project lasted two working days. The offices in the building continued to operate smoothly. No loud noises or vibrations were generated. In order to ensure high accuracy of the work result and objective assessments, an independent geologist was engaged to perform soil layer tests before and after the work. The report of the geotechnical test showed that the load-bearing capacity of the soil layer was increased 4 times! After full approval of the documentation, the firefighters were able to return to the tower and use it for their work. With URETEK technology, we stopped the subsidence of the tower.
