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Replacing traditional base reinforcement technology with Uretek

Industrial buildings and structures
Category
Elimination of the consequences of foundation subsidence
Object
The boiler room
Focus
Local reinforcement of the foundation base
Location
Oriol region
Time of work
2018 г.
The timing
3 days
TECHNOLOGY
DEEP INJECTION

Feature

Carrying out of works in the shortest possible time in basement inside the building

Source data

As the initial data, the regulations and production plan developed by the 3rd-party design organization in the scope of the project for major repairs of the production building were adopted. However, the proposed method of reinforcement did not suit the customer due to its complexity and uncertainties associated with the implementation of the proposed design solution.

Goals

Repairs had to be carried out at maximum speed due to the impossibility of carrying out planned construction and installation works above the reinforced area. The work had to be carried out in cramped conditions in the basements inside the building, and the work had to be carried out according to the requirements of the design organization.

Applied technology

According to the accepted design decision, it was necessary to strengthen the soil at the base of the foundation of the load-bearing wall. The solution to the problem was the method of ground injection, provided by URETEK technology (DEEP INJECTION).

Based on the conducted dynamic penetration test, the areas of the decompressed base were identified, and calculations were made for injecting the soil to achieve the required modulus of deformation and compressive strength of the ground for the problem area. In total, 13 injection points were implemented with injections at different levels under the sole of the foundation of the problem wall.

Result

The result was confirmed by laser monitoring during injection, and dynamic penetration tests before and after the works, which allowed us to evaluate the improvement of mechanical parameters of the soil in the injection zone up to five times. The effectiveness of strengthening the base was demonstrated by the fact of vertical lifting of subsided structures up to 0.5 mm. The work lasted 3 working days.

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