An engineering task of rehabilitating the old buildings by over- and mansard-storey buildup as well as incorporating the subterrain structures of various functions and space has been set as a major challenge in the context of contemporary urban development.
For the purposes of underpinning foundations and bases to be carried out with no interference into the current operation of the facility under rehabilitation, NIIOSP is in possession of the in-house elaborated cutting-edge manufacturing techniques for practical use of the injection and soil-cement piles, high-efficiency drilling machinery for socketing screwed-in and jacked piles into the soil, reinforcement techniques and chemical soil grouting.
Among numerous NIIOSP cutting edge technologies and design solutions some definitely stand out, namely: foundations and bases underpinning applying electric a new-generation electrochemical discharge technology; compensation grouting solidifying mortars to prevent above-limit base deformations referred to as vertical geotechnical barrier being an advanced technique stemming from practical application of the high-pressure water jet. Listed below are the facilities rehabilitated with participation of NIIOSP experts or application its know-hows.
1. Gostiny Dvor, Old Building
The Old Building of Gostiny Dvor is an XVIIIth-century heritage site. It is a closed-circuit elongated building of irregular trapezoid shape with a courtyard and total outer wall length of some 600 m.
The rehabilitation project envisioned the over-storey build-up and spanning the courtyard space with translucent shell structures, and construction of one subterrain level.
In course of the rehabilitation project implementation, complex geotechnical monitoring was carried out by the NIIOSP specialists and which included the monitoring activities of the super- and substructures deformations of the rehabilitated facility, elaboration of the deformation forecasts as well as monitoring observations over the groundwater level. The foundations underpinning resulted from the rehabilitation activities was achieved by application of the electric discharge technology.
2. The Stanislavsky and Nemirovich-Danchenko Moscow Music Theatre
The rehabilitation project for the Theatre envisioned the construction of a three-level underground parking garage within the Theatre courtyard.
NIIOSP designed and supervised a related geomonitoring programme which included the following key areas:
Status and strain monitoring of the superstructures and subterrain premises of the rehabilitated facility as well as other buildings and structures likely impacted by the geotechnical activities.
Generation of the deformation forecasts for the rehabilitated facility and the adjacent buildings and structures.
The excavation shoring while building the underground parking garage was achieved with application of the ‘wall-in-trench’ technology masterminded by NIIOSP.
3. The Moskva Hotel
The project related to the Moskva Hotel rehabilitation involves the construction of the two- and four-level underground premises.
The techniques applied in course of the excavation shoring activities in line with the substructure construction involve secant bored piles.
4. The Moscow Manezh Exhibition Hall
This building is listed among other heritage sites; and due to the fire of 2004 its three-axis stiffness suffered degradation.
In course of the rehabilitation activities it was decided to add up the building with an underground level and underpin the existing foundations.
While proceeding with the afore stated rehabilitation activities the following was completed:
- The underground level was strengthened by wall-in-trench with the depth of 7,55 m; the related underground space is developed within the internal boundaries of the erected walls at the distance of 4 m from them.
- Reinforcing of the existing walls by injection piles and cement grouting.
NIIOSP can be contracted for the performance of the activities as follows:
- Structural surveys of the buildings with the follow-up expert opinion on possible underground expansion together with recommendations on the bases reinforcement and foundations underpinning
- Designing of the bases reinforcement and foundations underpinning
- Scientific and technological supervision of the rehabilitation activities
- Complex monitoring of the adjacent area and existing development due to the rehabilitation activities in progress.