Abstract
This research paper validates the significance of an assimilated attitude when choosing the design of the subgrade of railways constructed from fine sands in difficult engineering and geological conditions in the desert and steppe territories of Uzbekistan to ensure their sustainability with modern technologies and materials. The analysis of the results obtained in the calculations of the stability coefficient of the design structure of the embankment. The characteristics of the embankment soils correspond to the design data of the object "Removal of the existing railway section Dunguluk-Burgutli-Misken from the flood zone of the Shurbulak reservoir" The results of the calculations performed by the method of G. M. Shakhunyants, as well as the software "GEO 5" and "Plaxis 2D" show that the structure of the embankment with a height of more than 6 meters does not provide the required standard coefficient of stability. Complete warps of the embankment and graphs of changes in the stability coefficient of the design structure of the embankment, and with the laying of geotextiles as reinforcement of the pattern of the subgrade of railways, are given. Beneficial solutions to increase the stability coefficient of the embankment from fine sands are proposed, and the efficiency of using geosynthetic materials as a reinforcement of the pattern of the subgrade is substantiated. Theoretical calculations and analysis of prevailing embankment structures confirm the feasibility of reinforcing the structure of the subgrade erected from fine sands on the railway lines of Uzbekistan.
Highlights
Over the past period, in Uzbekistan, as a result of the state policy in the transport sector, large-scale work has been carried out to organize an effective transport system that meets the demands of the economy and the population in transport services with all types of transport
The use of geosynthetic materials in the construction of subgrade erected from fine sands in difficult engineering and geological conditions may be more significant from the point of view of operability and transport and the operational reliability of the structure obtaining one-time cost savings
3.1 The results of calculating the stability coefficient of the embankment The calculations were performed in the spreadsheet editor Microsoft Excel and are shown in Figure 2 and 3, as well as in table 1
Summary
In Uzbekistan, as a result of the state policy in the transport sector, large-scale work has been carried out to organize an effective transport system that meets the demands of the economy and the population in transport services with all types of transport. The most important tasks for railway transport in the near future are the expansion of the road network, the further improvement of railway transport, the increase in speeds and axle loads. The construction of new railways in the central and northwestern regions of the Republic was carried out. The complexity of construction in these areas is associated with a harsh climate, difficult geological and hydrogeological conditions. The tracks of these roads mostly run through deserts. Given the lack of soils with characteristics that contribute to the stability of the subgrade, the filling of embankments was mainly carried out and will continue to be carried out by fine and dusty sands widespread in these areas
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