Features of geotechnical monitoring of roadway construction on permafrost soils
https://doi.org/10.52170/1815-9265_2022_62_23
Abstract
The relevance is substantiated and the composition of geotechnical monitoring is recommended to accompany the intensive technology of increasing the bearing capacity of high-temperature permafrost soils. The content of the requirements for the safety of geotechnical structures during the construction period is outlined. The peculiarity of the intensive technology of the construction of the roadbed is noted, which consists in the production of work on unfinished and not fully protected structures using the maximum permissible construction loads. During construction, the design scheme and types of loads change, their negative combination is possible, especially when working on slopes and slopes. As a result, structures may be in a condition close to the limit in terms of stability under the influence of powerful construction equipment, the risk of deformations of the object increases. The expediency of regulating technological processes in order to improve the strength characteristics of the foundation of the roadbed on permafrost is shown. A method of technological regulation based on the results of geotechnical monitoring, including laser scanning and geophysical surveys in real time, has been developed. During the preparation of production, it is also necessary to provide for the possibility of activation of hazardous natural processes under intense loads – permafrost degradation, landslides and the development of taliks. The necessity of forecasting permafrost processes during the construction period is substantiated. During the construction of the roadbed, it is recommended to use soil compacting machines equipped with automated quality management systems and allowing stepless change of vibration roller loads. The experience of improving the deformation characteristics of weak foundations of the roadbed is described. The method of technological regulation of loads to the maximum permissible values is based on the analysis of the results of geotechnical monitoring and takes into account the possibilities of various modes of operation of soil compacting machines. The effectiveness of intensive technology combined with monitoring is to increase stability, stability and accelerate the consolidation of the roadbed.
About the Authors
A. A. Lychkovskiy
Russian University of Transport (MIIT)
Russian Federation
Russian Federation
Aleksandr A. Lychkovskiy – Post-graduate Student of the Design and Construction of Railways Department
Moscow
S. Ya. Lutskiy
Russian University of Transport (MIIT)
Russian Federation
Russian Federation
Svyatoslav Ya. Lutskiy – Doctor of Engineering, Professor of the Design and Construction of Railways Department
Moscow
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Review
For citations:
Lychkovskiy A.A., Lutskiy S.Ya. Features of geotechnical monitoring of roadway construction on permafrost soils. Bulletin of Siberian State University of Transport. 2022;(3):23-30. (In Russ.) https://doi.org/10.52170/1815-9265_2022_62_23
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