R&D in the field of construction
One of business areas of Research Center of Construction is development and introduction of innovative products. Ву 2016 year Center has 101 patents, 59 inventions, 41 utility models, 5 trademarks, 1 know-how. The unique inventions of the Centre are aimed at ensuring safety and security in buildings, structures and other objects.
Innovations are subject to the development stage, the pilot production and usage in pilot projects.
The main patented inventions of Research Center of Construction are as follows:
- Aggregate for very light aggregate concrete «Termogran»
The construction cellular glass-ceramic «Termogran» is simply and economically efficient in one-step environment-oriented production process based on widespread natural silica rocks.
Thermal insulation properties and strength characteristics of «Termogran» considerably exceed the characteristics of analogues - imported high-grade foam glass. Thus the cost price of "Termograna" is twice below than analogues thereof that provides a reduction in the cost of materials and structures using this material. The cellular glass-ceramic «Termogran» has high life, no flammability and moisture resistance. The materiall is well adapted to the Portland cement, resistant to aggressive chemical environments, and works in the temperature range between -200 and +700 C.
- Continuous flight augering compensation pile
Usage of continuous flight augering compensation piles allows to go back from such costly measures as reinforced jack piles that reduces power and labor costs and increases safety of geotechnical works under close city development.
The self costs of such continuous flight augering compensation piles are below by 2.4 times than of the conventional analogues keeping higher technical efficiency.
The continuous flight augering compensation piles are successfully used in significant structures of Moscow including conversion of Moscow P.I. Tchaikovsky Conservatory and structures and buildings of the Higher economic school.
- Geotechnical barrier to change (adjust) soil stress-strain behavior
Increases safety of geotechnical works under close city development as well as reduces power and labor costs. Application of such geotechnical barrier allows to go back from costly affairs such soil stabilization, underpinning with cylinders, soil reinforcing in case of construction / reconstruction of buildings and structures.
The prime costs of the geotechnical barrier are lower by 42% than of underpinning piles and by 17% than of divide walls of tube piling at the higher technical efficiency.
This invention is regulated by established regulatory guidelines, it is introduced into the construction rules and regulations, design and construction specifications and other regulatory documents of the Russian Federation of geotechnical area. Applied in conversion of Pushkin Museum, Higher economic school and other objects.
- Geotechnical barrier in vertical and inclined plane using compensation grouting technique
To keep the current buildings and structures including utility lines there are conventional protection measures (soil stabilization, underpinning pile etc.) used in the modern construction practice. Such designing can be described as passive.
The innovative invention of the Research center for foundations and underground structures provides for another way - active influence on soil stress-strain behavior to compensate its changes and recover up to initial state.
The geotechnical barrier is an injection of concrete mixture into the soil through special injectors (metal tubes with holes). Due to multiple injections we achieve stabilization of soil stress-strain behavior.
The corporate standard СТО 36554501-007-2006 «Designing and arrangement of geotechnical barrier in vertical and inclined plane using compensation grouting technique » is developed. The European analogues of Russian regulatory documents – Eurocodes – have no corresponding provisions to adjust the soil stress-strain behavior.
The results of development and introduction are published by developers in their studies, in over 30 articles in periodical literature and reported at Russian and international conferences.
Research work based on the said technique - «Adjustment of soil stress-strain behavior in new construction and reconstruction under close city development » was awarded by the Government of the Russian Federation in the area of science and technique in 2013.
The scientific research results are introduced in 18 regions of Russia including Moscow and Moscow region, Saint Petersburg, Leningrad Region, Sochi, Murmansk, Novosibirsk, Kemerovo, Arkhangelsk etc. The invention is tested in significant construction objects such in Moscow – construction of the third ring road, the underground structure of Russian Federal Property Fund building etc. When developing the underground space of Moscow P.I. Tchaikovsky Conservatory in 2010-2011 application of techniques to adjust soil stress-strain behavior allowed to perform works of canalization at the depth of 4.5m under the historical Grand hall practically with no settling.
The said invention can be presented as installation or model showing the current building, underground excavation, geotechnical barrier in form of injectors and cement mix lenses.
- Coating for neutralizing ammonia emission
When performing in situ concrete works in winter the unique composition makes it possible to reduce ammonia emission out of concrete structures up to MRL level according to hygienic norms 126.96.36.1998.03 and Sanitary/Hygienic Norms and Regulations, Sanitary Rules and Norms 188.8.131.522-00 not affecting the strength characteristic of concrete.
The relevancy of the invention is caused by that many areas are not used due to significantly increased ammonia level in the concrete so that you can smell it with no measurers.
Application of the coating has proven itself positively after long monitoring of object state after ammonia neutralization.
- Combined piled-raft foundation
Usage of such foundations allows to reduce piles number by 25-40% in construction and thus to lower the construction costs and duration.
The technique has successfully proven itself in construction of 49-floor office building in the area 16 Moscow International Business Center Moscow-City, the cost impact is 42%.
- Test procedure of large-diameter bored pipes
Allows to increase the bearing capacity of the pile. Use of the technique when constructing 86-floor building in the area No 16 Moscow International Business Center Moscow-City allowed to reduce pile length of diameter 1.5 m by 28%, from 33 to 24 m. The total cost impact for both buildings in the area No 9 16 Moscow International Business Center Moscow-City is 160 Mio RUR.
- 1,5-2,0-fold heavy-duty piles (preferred bored and cement soil)
Piles bearing capacity is increased by 2 times as opposite to estimated capacity when constructing the business-center at the address: Moscow, Ryazansky Prospect 20. The cost impact is 75-77 Mio RUR.
- Self-stressing concrete
Adfditives to the concrete allowing to eliminate waterproofing works when founding. More effective in capacity, underground building envelops, floors, covers including used and non-roll roofing where it is required to ensure water and crack resistance, protection against carcinogenic and radioactive effects.
- Soil compaction technique by use of special facilities
The invention is important for made land compaction, industrial waste discharge, unconsolidated and non-uniform grounds and allows to go back from usage of piles foundation. Replacing piles by compacted foundations provides for reduction of duration and costs of works by 3 times.