Architectural Heritage

We perform injection works at cultural and historical heritage sites, where it is critically important to preserve the authenticity of structures and the external appearance of the building. Technologies of soil injection, base stabilization, foundation strengthening, and reinforcement of excavation walls make it possible to eliminate settlement and deformations without disturbing the historical structure of the facility.

Our solutions are applied to stop further settlement, restore the bearing capacity, and ensure long-term stability of protected buildings. Inject operates delicately, taking into account restoration requirements and heritage protection regulations, minimizing intervention in historical materials and structural elements.

Church of Saint Martyr Tatiana

Stabilization of church foundations by injection method

During the operation of the church, uneven settlement of the foundations was recorded, which caused the appearance of vertical and inclined cracks in the load-bearing walls, as well as local floor deformations.

Engineering inspection and dynamic probing revealed the presence of loosened and over-saturated soils within the active zone up to 4.0 m, caused by an insufficiently effective drainage system and uneven density of the base.

To prevent further deformations, a decision was made to perform deep injection strengthening of the foundation base.

Completed works

Marking of the injection field along the perimeter of the church foundations was carried out, followed by drilling of injection boreholes Ø45 mm in a staggered pattern.

In total, 146 boreholes with a depth of up to 4 m were installed.

Through the prepared boreholes, stage-by-stage injection of a gel composite solution was performed under controlled pressure, forming stabilizing injection masses within the foundation zone.

The works were carried out using compact equipment, taking into account continuous operation of the church and the schedule of religious services.

After completion of the injection, the technological openings were sealed, and control measurements were performed.

Ivano-Frankivsk Regional Philharmonic named after Iryna Malaniuk

Comprehensive stabilization of the foundation base of the Ivano-Frankivsk Philharmonic

During the operation of the building, local subsidence of the soil base beneath the foundations was recorded, along with the appearance of vertical and diagonal cracks in load-bearing walls and signs of reduced soil density in certain areas.

The deformations were caused by changes in hydrogeological conditions, malfunction of the drainage system, and uneven soil moisture.

Considering the high cultural and architectural value of the facility, it was necessary to perform foundation stabilization without intervention in the structures and without interrupting building operation.

Completed works

Engineering marking of the injection field in deformation zones was carried out, followed by drilling of small-diameter boreholes Ø45 mm in a staggered pattern to a depth of up to 6.0 m.

Through the boreholes, stage-by-stage injection of a gel composite solution was performed under controlled pressure up to 8.0 MPa, forming compacting injection masses within the soil base of the foundations.

During the injection process, continuous geodetic monitoring of structural movements and control of solution consumption were ensured.

After completion of the works, the technological openings were sealed, and control measurements of base stability were carried out.

Mansion of the Commander of the Kyiv Military District

Architectural and urban planning monument of local significance

The building is an architectural and urban planning monument, which imposes special requirements on any interventions in its structures. During the execution of the works, the key priority was the preservation of the authenticity of historical elements, prevention of vibration impacts, and avoidance of any actions that could damage the original structures.

The house is an original example of residential architecture of state dachas and representative mansions of the post-war period, which enhances its historical and architectural value and determines increased requirements for construction technologies.

During technical inspection and geodetic survey at the site — an architectural and urban planning monument — local and extended zones of subsidence of structural elements were recorded, associated with deformations of the soil base beneath the building foundations.

According to the inspection results, the causes of deformation were identified as uneven physical and mechanical characteristics of the foundation soils formed during the initial construction period, as well as long-term moisture impact from underground engineering networks during operation. This led to over-saturation, local washout, and re-compaction of soils with the formation of sub-foundation voids.

The identified technical condition created risks of further deformation development, which could negatively affect the historical load-bearing structures of the building and lead to loss of their design stability, which is critical for a cultural heritage object.

Within the framework of major renovation of the complex of non-residential buildings and structures with restoration works, stabilization of the soil base was performed using special gel composite solutions without exposing the foundations and without intervention in the historical load-bearing elements of the building.

The application of Inject technology made it possible to carry out the works in a highly delicate manner for the architectural monument, ensuring stabilization of the base without disturbing its historical structure.

The technical objective of the works was to stop the development of deformations threatening historical structures, increase the bearing capacity of soils beneath the existing foundations, and create a stable base for further restoration measures. At the same time, the use of methods requiring exposure or traditional strengthening of foundations was completely excluded.

Secondary School No. 7 (Queen Jadwiga Girls’ School)

Architectural heritage monument of local significance, No. 173-IF

Queen Jadwiga Girls’ School is a historic educational institution with long-standing origins and was one of the key schools in the city of Ivano-Frankivsk (formerly Stanislaviv). The building has the status of an architectural monument of local significance and is part of the historical architectural environment of the central part of the city.

Preserved authentic structures, planning solutions, and finishing elements are protected, which imposes strict requirements on the execution of any engineering works.

Strengthening of the foundations required the use of technologies that ensure stabilization of the soil base without exposing the foundations, without vibration impact, and without intervention in historical load-bearing structures.

During the inspection of the building prior to restoration works, a significant decrease in the bearing capacity of the soil base beneath the foundations, local subsidence and deformation of structural elements, as well as active development of cracks in load-bearing walls were identified.

Such a technical condition created a real threat of further deterioration of the architectural monument and required immediate, delicate engineering intervention in compliance with heritage protection requirements.

Completed works

As part of preparation for restoration works, bored injection stabilization of the soil base using gel composite solutions with Inject technology was performed.

An individual spatial planning scheme of injection was developed, taking into account heritage protection constraints. The works were carried out using compact equipment within an operating building, without dismantling its elements.

A total of 877 injection boreholes Ø40–50 mm were drilled in a staggered pattern with a spacing of 0.7 m to a depth of up to 6 m.

Layer-by-layer injection was carried out under controlled pressure up to 8 MPa with continuous monitoring of the condition of walls and foundations.

During the execution of the works, the school remained fully operational.

The total volume of injection solution amounted to approximately 95 tons, using M-500 cement.

Memorial House-Museum of Mykola Lysenko
 

Historical and architectural monument of national significance of Ukraine

The building has the status of an architectural and urban planning monument and belongs to cultural heritage sites of national significance. It is a memorial house associated with the life and work of an outstanding Ukrainian composer, which further enhances its historical, cultural, and social value.

The facility is located within a formed historical environment of the central part of the city and is an integral part of a cohesive architectural ensemble of its period. Preserved authentic planning solutions, structures, and finishing elements are protected and do not allow any interventions that may alter or damage the historical structure of the building.

Accordingly, the execution of engineering works required the use of technologies that ensure structural stabilization without exposing foundations, without vibration impact, and without intervention in historical load-bearing elements, with strict compliance with heritage protection regulations.

As a result of military actions, visual deformations of the building and the soil base, as well as partial foundation settlement, were recorded, posing a threat to the stability of its historical load-bearing structures.

Technical inspection and geodetic monitoring revealed over-saturation of soils, local washout, and formation of sub-foundation voids. This led to uneven performance of the foundation base and the appearance of cracks in the walls.

Foundation settlement of up to 30 mm, local voids in the soil up to 250 mm, vertical and inclined cracks in load-bearing walls, and increased soil moisture due to lack of effective drainage were identified.

This condition was critical for a cultural heritage site and required immediate engineering intervention without the use of traditional strengthening methods.

Completed works

Within the framework of emergency and restoration measures, injection stabilization of the soil base using gel composite solutions with Inject technology was performed without exposing the foundations and without intervention in the historical elements of the building.

A spatial planning scheme of injection was developed, taking into account heritage protection constraints. Limited space and difficult access to drilling zones required the use of modular drilling augers and specially adapted equipment for work in premises with low ceiling heights up to 2 m and dense layouts.

A total of 234 small-diameter injection boreholes were drilled in a staggered pattern, and injection was carried out to a depth of up to –5 m under controlled pressure up to 8 MPa.

Injection of cracks in load-bearing and self-supporting walls was also performed using compact equipment, with a total length of 95 linear meters.

The total volume of injection solution amounted to approximately 12,500 liters.

“Candle Factory (Cells of the Guest Court)”, Building No. 64

Emergency restoration works on an architectural monument. Architectural monument of local significance, protection number: No. 4/80

Building No. 64 “Candle Factory (Cells of the Guest Court)” is a historic structure within the complex of the Holy Dormition Kyiv-Pechersk Lavra and belongs to cultural heritage sites subject to a special regime of operation and restoration works.

The building has significant historical and architectural value; therefore, any engineering interventions required highly delicate technological solutions without dismantling existing structures and without altering authentic masonry elements.

As a result of long-term operation, exposure to atmospheric precipitation, local soil saturation, and malfunction of drainage systems, uneven settlement of individual foundation areas was recorded, along with the formation of cracks in load-bearing walls and masonry, as well as a decrease in the density of the soil base with the formation of sub-foundation voids.

The identified deformations created risks of further crack development and loss of stability of individual structural elements, which required urgent emergency restoration measures.

Considering the status of the architectural monument, the key requirements for the works were:

• minimal intervention in historical structures;
• no exposure of foundations and no large-scale earthworks;
• use of compact equipment for work in confined conditions;
• continuous monitoring of the building condition during injection.

Completed works

To stabilize the foundation base, the Inject bored injection technology was applied, which involves injection of a gel composite solution into the soil base to compact it and increase its bearing capacity.

A total of 278 small-diameter boreholes Ø45 mm with a depth of up to 4 m were drilled in a staggered pattern with a spacing of approximately 0.7 m.

Through the installed packer system, stage-by-stage injection of the solution was carried out under working pressure up to 8 MPa, with continuous geodetic monitoring.

House of the Fraternal Cells of the Kyiv-Mohyla Academy

Injection strengthening of foundations of a historic building

House of the Fraternal Cells of the Kyiv-Mohyla Academy is a historic brick building dating back to 1823, with a second floor added in 1879, and possesses significant architectural and cultural value.

During the inspection, uneven deformation of the foundations, settlement of individual base areas, and development of cracks in the walls were recorded. The condition of the soil base was characterized by reduced density and increased moisture, creating a risk of further deformation of the historic structure.

Considering the status of the building, the works had to be carried out without excavation of the foundations and without intervention in the structures.

Completed works

Strengthening of the foundations was performed using the method of deep injection of the soil base to a depth of up to 4 m, with injection of a gel composite solution and formation of a stabilizing injection mass beneath the building foundations.

At the same time, injection saturation of soils along the perimeter of the structure was carried out, forming a vertical waterproofing barrier, which ensured protection of the foundations from further moisture without excavation works.

Additionally, injection of cracks and pores within the foundation body was performed, with sealing of structures to a depth of up to 15 m.

Old Academic Building of the Brotherhood Monastery

Injection strengthening of foundations of a monument of national significance

During the technical inspection of the Old Academic Building of the Brotherhood Monastery (1703–1740), which is an architectural and historical monument of national significance, the development of uneven foundation settlement was identified, caused by a decrease in the density of the soil base and local zones of loosening.

Considering the historical value of the structure and restrictions on structural intervention, a decision was made to perform strengthening of the base without exposing the foundations and without earthworks.

Completed works

A complex of works was carried out to strengthen the soil base of the foundations using the method of controlled injection of a gel composite solution through a system of specially arranged injection boreholes.

Church of Saint Andrew Pervozvannyi

Strengthening of foundations and waterproofing of the Church of Saint Andrew Pervozvannyi

During the operation of the church building, signs of uneven foundation deformations were recorded, along with increased filtration of groundwater and moisture in basement areas, which led to loss of operational properties of structures and development of biological damage (mold, dampness).

Taking into account the features of the existing development and the need to minimize intervention in structures, a decision was made to perform a complex of works for strengthening the foundation base and creating an injection waterproofing system without excavation works.

Completed works

Strengthening of the foundations was carried out using the method of deep injection of the soil base with a gel composite material to a depth of up to 5 m, forming compacted reinforced masses in the foundation base zone.

To eliminate water inflow, injection saturation of the soil base along the perimeter of the building was performed, forming a continuous vertical cut-off waterproofing screen.

Additionally, injection of cracks, voids, and pores within the foundation body was carried out to a depth of up to 3 m, ensuring sealing of the structures and restoration of their monolithic integrity.

The works were performed without exposing the foundations and without excavation works.