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Geosynthetics for Slope Protection of the Truck Haul Road Subgrade Under Conditions of Underflooding

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Yu.A. Makarova, A.Yu. Manukovskiy

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UDС

625.7/.8

DOI:

10.17238/issn0536-1036.2017.3.114

Abstract

The key problem in the construction of truck haul roads is a negative impact of natural and climatic factors. For most logging regions, one of the main reasons for the subgrade destruction of motor roads is a severe overwetting of soils and frequent occurrence of floods and mudflows. The increasing requirements for the design and construction of motor roads can subsequently reduce the material cost for their reconstruction and reconditioning. Under the conditions of increased soil moisture, the bearing capacity of the subgrade is significantly reduced. This phenomenon, despite the possibility of its predicting and reducing its consequences, is always devastating. An example of this is the catastrophic flooding in the Khabarovsk Territory in 2013. The work objective is to develop an alternative method to improve the strength characteristics of the subgrade of motor roads, exposed to negative natural and climatic factors. Based on the preliminary mathematical modeling in the Flow Vision environment of the water flow effect on the subgrade of the truck haul road at various speeds we can conclude that the upper slopes and the subgrade support face danger. During floods, the most damaging effect is provided by flowing water. Thus, at a flow rate of more
than 1.5 m/s, deformation of the subgrade becomes inevitable. Improving the road strengthening methods will create more long life constructions for the subgrade protecting. We have proposed a new protection structure of subgrade slopes, which can be used in the construction of truck haul roads in the regions affected by the negative impact of floods. This combined version of slope strengthening will reduce the degree of road destruction depending on the time and speed of the water flow effect on the subgrade surface.

Authors

Yu.A. Makarova, Postgraduate Student A.Yu. Manukovskiy, Doctor of Engineering Sciences, Professor

Affiliation

Voronezh State University of Forestry and Technologies named after G.F. Morozov, ul. Timiryazeva, 8, Voronezh, 394087, Russian Federation; e-mail: juliamja@mail.ru, mayu1964@mail.ru

Keywords

waterlogging, road havoc, flooding, slope, subgrade protection, geosynthetic.

For citation

Makarova Yu.A., Manukovskiy A.Yu. Geosynthetics for Slope Protection of the Truck Haul Road Subgrade Under Conditions of Underflooding. Lesnoy zhurnal [Forestry journal], 2017, no. 3, pp. 114–122. 10.17238/issn0536-1036.2017.3.114

References

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Geosynthetics for Slope Protection of the Truck Haul Road Subgrade Under Conditions of Underflooding

 

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