Experience in the use of nail structures presented in St. Petersburg

More than 60% of Russia’s territory is located in permafrost and swamp areas. Nevertheless, in the coming decades, the territory of the Far North is going to face large-scale transport development, including the construction of railways. 

How to increase the stability of the embankment when the ground has thawed and the base has degraded? Chief designer of GEOIZOL Project I. S. Bogdanov: “Thawing prevention is a separate area of geotechnical work. We offer solutions to increase the stability of the embankment body when the base has lost its strength characteristics.” 

Using soil nails with GEOIZOL-MP multifunctional geotechnical system secures the embankment against active landslide processes and increases its stability during degradation of the base. 

The process of setting up the system on the ground consists of simultaneously drilling and injecting cement grout into factory-built micro piles. 

The technology allows using existing embankments during the production of works to increase strength properties, including in permafrost conditions. 

Soil nails were performed to increase the stability of the embankment body during the reconstruction of the Gorkovsky and Sverdlovsk Railways. As a result, a positive effect was registered. 

The technology of fastening embankments using soil nails has proven itself well during the construction of Olympic facilities in Sochi in 2012. Now it is actively used in the Krasnodar region, in Crimea at the construction of the Tavrida highway. 

The technology is already reflected in a number of performance standards in the field engineering protection of the territory. 

It is important to develop this technology in permafrost areas. 

On May 23, the chief designer of GEOIZOL Project, I. S. Bogdanov, told about this at a session that took place within the framework of the IV International scientific and technical conference Transport Construction in Cold Regions (TRANSOILCOLD 2019). The event was held on May 20-23 at Emperor Alexander I Saint Petersburg State University of railway transport. 

The conference Transport Construction in Cold Regions (TRANSOILCOLD 2019) was attended by Russian experts, specialists from Germany, Kazakhstan, Canada, China, Pakistan, Poland, the USA, the Czech Republic, and South Korea. 

During four days, the breakout sessions discussed the use of geosynthetic materials in transport construction, soil dynamics, design, construction, and operation of the roadbed of railways and highways and geotechnical facilities, the impact of permafrost on the condition of transport structures, etc. 

Within the frame the of conference, the Russian branch of the International Geosynthetic Society held a meeting. 

The conference was supported by the International Society for soil mechanics and geotechnics, including the following technical committees: TC202 Transport geotechnics, TC215 geotechnics and ecology, TC216 geotechnics of frozen soils, the International Society of geosynthetic materials, the International community of young permafrost scientists. 

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