Selection of the Optimal Type of Bored-Injection Piles Strengthening of Weak Bases of High-Speed Railway Lines

Ensuring reliable operation of the supporting subsoil of embankments of high-speed railway lines is a particularly important geotechnical problem that requires special consideration when constructing such facilities. This is especially true when underlying layers with reduced values of strength and deformation characteristics (for example, dead arms of river, including biogenic soils such as silts, peat, sapropels, as well as other types of structurally unstable engineering-geological elements) lie below the bearing layer. In this case, the need to increase their bearing capacity and reduce deformability increases many times. Therefore, the choice of geotechnical technology should be carried out on the basis of interactive design, in which the principle of «technical integrity and economic efficiency» is laid. This article considers one of the approaches to increasing the operational reliability of the bases of high-speed railway lines in the presence of weak underlying layers.

N.S. SOKOLOV, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
S.S. VIKTOROVA, Engineer
I.P. FEDOSEEVA, Engineer
G.M. SMIRNOVA, Engineer

I.N. Ulianov Chuvash State University (15 Moskovsky Prospect, Cheboksary, 428015, Chuvash Republic, Russian Federation)

1. Il’ichev V. A. , Mangushev R.A., Nikiforova N.S. Development of underground space in large Russian cities. Osnovaniya, fundamenty i mekhanika gruntov. 2012. No. 2, pp. 17–20. (In Russian).
2. Boldyrev G.G., Barvashov V.A., Idrisov I.Kh., Khryanina O.V. Integrated technology of geotechnical survey. Vestnik PNIPU. Stroitel’stvo i arkhitektura. 2017. Vol. 8. No. 3, pp. 22–33. (In Russian).
3. Ter-Martirosyan Z. G. Mehanika gruntov [Mechanic of soil]. Moscow: ASV. 2009. 550 р.
4. Balura M.V., Okulova M.N. On the influence of some factors on the deformability of soils in the horizontal direction. V kn.: Osnovaniya i fundamenty zdanij i sooruzhenij v usloviyah stroitel’stva Tomska [Bases and foundations of buildings and structures in the construction of Tomsk]. Tomsk: Tomsk State University of Architecture and Civil Engineering. 1977, pp. 36–41.
5. Mangushev R. A., Gursky A. V. Assessment of the impact of sheet pile indentation on additional precipitation of neighboring buildings. Geotechnica. 2016. No. 2, pp. 2–7. (In Russian).
6. Mangushev R. A., Sapin D.A. Taking into account the rigidity of the “wall in the ground” on the draft of neighboring buildings. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2015. No. 9, pp. 3–7. (In Russian).
7. Okulova M.N. Investigation of the stress-strain state of soils near the loaded stamp. Osnovaniya, fundamenty I mekhanika gruntov. 1966. No. 4, pp. 5–8. (In Russian).
8. Shelest L.A. Vertical and horizontal deformation of soil during die testing. Trudy NIIOSP. Moscow. NIIOSP. 1972. Vol. 63. (In Russian).
9. Nikiforova N. S., Vnukov D. A. Geotechnical cut-off screens for the protection of buildings in the device of communication collectors. III Academic reading them. Professor A.A. Bartholomew. The foundations of the deep laying and problems of underground expanse development. October 18–19, 2011. Perm: PGPU. 2011, pp. 413–42. (In Russian).
10. Sokolov N.S. Ryabinov V.M. The technology of appliance of continuous flight augering piles with increased bearing capacity. Zhilishnoe Stroitelstvo [Housing Сonstruction]. 2016. No. 9, pp. 11–14. (In Russian).
11. Barvashov V.A., Boldyrev G.G., Utkin M.M. Calculation of sediment and roll of structures, taking into account the uncertainty of the properties of soil bases. Geotekhnika. 2016. No. 1, pp. 12–29 (In Russian).
12. Sokolov N.S. Criteria of economic efficiency of use of drilled piles. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2017. No. 5, pp. 34–38. (In Russian).
13. Sokolov N.S. Definition of the type of a buried structure for base strengthening beneath the embankment of high-speed railway. Stroitel’nye Materialy [Construction Materials]. 2018. No. 9, pp. 62–65. DOI: https://doi.org/10.31659/0585-430X-2018-763-9-62-65 (In Russian).
14. Sokolov N.S. Technology for increasing the bearing capacity of the base. Stroitel’nye Materialy [Construction Materials]. 2019. No. 6, pp. 67–71. (In Russian). DOI: https://doi.org/10.31659/0585-430X-2019-771-6-67-7