Project: Private two-storey residential building with a basement
Location: Moscow region
Year: 2020
Duration: 3 working days
Technology: DEEP INJECTION
Restoration work after determining the uneven settlement of the strip foundation
Problem
Cracks on the inside of the basement walls
Solution
Strengthening the foundation base
The house was built in 2014. Foundation – strip type; foundation footing level is -3.0 m from the ground surface. Total house area is 180 m², including the basement floor. Walls are aerated concrete blocks.
In 2017, the customer discovered small cracks on the facing brick. Initially, he assumed the brick was of poor quality and decided to monitor the deformation changes. Later, cracks appeared on the inner sides of the basement walls, after which the customer immediately contacted us for a consultation.
Cracks were found in one half of the house. We surveyed that part of the house (at the customer's request), gave recommendations for strengthening and for surveying the rest of the house.
The client decided to continue monitoring; settlement continued and cracks appeared in the second part of the building.
The issue to be resolved:
Strengthening the foundation base soils around the perimeter of the residential house.
In 2017, the customer discovered small cracks on the facing brick. Initially, he assumed the brick was of poor quality and decided to monitor the deformation changes. Later, cracks appeared on the inner sides of the basement walls, after which the customer immediately contacted us for a consultation.
Cracks were found in one half of the house. We surveyed that part of the house (at the customer's request), gave recommendations for strengthening and for surveying the rest of the house.
The client decided to continue monitoring; settlement continued and cracks appeared in the second part of the building.
The issue to be resolved:
Strengthening the foundation base soils around the perimeter of the residential house.
Problem
Technology applied:
The problem was solved by the DEEP INJECTION method according to URETEK technology, including measures to stabilise foundation settlement by strengthening and consolidating the soil in the base, increasing its strength and deformation characteristics with the URETEK polymer composition. The foundation base strengthening was carried out to the depth of the stress propagation zone from the acting loads, ranging from 3.5 meters from the ground surface to 5.7 meters. Depending on the injection zone, packers were installed at one to three depth levels.
The problem was solved by the DEEP INJECTION method according to URETEK technology, including measures to stabilise foundation settlement by strengthening and consolidating the soil in the base, increasing its strength and deformation characteristics with the URETEK polymer composition. The foundation base strengthening was carried out to the depth of the stress propagation zone from the acting loads, ranging from 3.5 meters from the ground surface to 5.7 meters. Depending on the injection zone, packers were installed at one to three depth levels.
The project in detail
Technologies applied:
The problem was solved by the method of wall‑side horizontal injection SLAB LIFTING, according to URETEK technology. The injection of URETEK polymer, which has waterproofing properties, was carried out at the point of contact between the wall surface and the soil through small‑diameter metal tubes, which made it possible to carry out waterproofing work quickly and efficiently. Additionally, in addition to creating a waterproof coating on the external surface of the walls (due to contact filtration of the solution during its hardening), the existing voids along the contact in the walls and soil were filled, along with their compaction.
The problem was solved by the method of wall‑side horizontal injection SLAB LIFTING, according to URETEK technology. The injection of URETEK polymer, which has waterproofing properties, was carried out at the point of contact between the wall surface and the soil through small‑diameter metal tubes, which made it possible to carry out waterproofing work quickly and efficiently. Additionally, in addition to creating a waterproof coating on the external surface of the walls (due to contact filtration of the solution during its hardening), the existing voids along the contact in the walls and soil were filled, along with their compaction.
Solution
The work area was constantly monitored using a laser level during injections. To control void filling and restoration of bearing capacity, the technology provides for a characteristic "lifting" signal indicating that the result has been achieved. After the work was completed, a geodetic survey was carried out to monitor the movement of the house during the warranty period.
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