Visnyk LNAU: Architecture and Farm Building 2021 №22: 5-10
STRESS-STRAIN STATE IN THE VICINITY OF HORIZONTAL SOIL EXCAVATION
J. Luchko, Doctor of Technical Sciences
ORCID ID: 0000-0002-3675-0503
Lviv National Agrarian University
V. Kovalchuk, Doctor of Technical Sciences
ORCID ID: 0000-0003-4350-1756
Lviv affiliation of Dnipro National University of Railway Transport named after
Academician V. Lazaryan
О. Petrenko, Candidate of Technical Sciences
ORCID ID: 0000-0002-8870-8534
Lviv Polytechnic National University
https://doi.org/10.31734/architecture2021.22.005
Annotation
In this work (stress-strain state in the vicinity of horizontal workings) the analysis and synthesis of scientific and technical sources where the efficiency of application of methods and methods of horizontal workings for small diameters of laying pipes for communications is shown. In particular, culverts through the ground of roads and railways.
An attempt is made to form the basic principles and calculation scheme of the study of horizontal development for large diameters greater than 2000 mm. In particular, to solve a complex problem, which is very difficult to solve by analytical method, to determine the stress-strain state in the vicinity of the workings, taking into account the main factors that would reflect the real mechanical processes occurring in horizontal workings in a closed way. Therefore, the finite element method in the Plaxis 8.2 software package was used for the calculation.
It is established that the determination of the stress-strain state in the vicinity of the excavation for a large cross section of the pipe is associated with complex mechanical processes that occur during horizontal excavation and depend on a number of factors – physical and mechanical characteristics of the soil, methods of horizontal development and technological parameters. its implementation.
The stress-strain state of the horizontal soil excavation of the road surface of large cross-section is calculated.
It is established that reliable results of calculation of stresses and deformations of excavation can be obtained using the finite element method.
It is established that the maximum deformations occur at the top of the horizontal excavation, and the maximum stresses occur at a point that deviates from the vertical axis of the excavation by an angle of 30 degrees. Therefore, this feature of stress distribution must be taken into account when strengthening the excavation in the process of trenchless penetration.
Key words
earthen bed, horizontal excavation, stress, deformation
Full text
Link
- F. Kucheryavyi, A. N. Kolomiets, Yu. F. Kucheryavyi. On calculatopn of the stress-strain state of an area while exploding a cylindrical charge: Izv. vuzov. Mountainous journal. 1974. No. 12. P. 51–55.
- Luchko I. I., Letschenko A. V. Saturation with corrasion protection solution of reinforced concrete bar of round cross-section. Materials of celdration the sixth International scientific conference. VII sekcia. Kosice, 1997. P. 21–24.
- Luchko Y., Hnativ Yu. Stress state of a ground massive while making horizontal working by solidification method. Bulletin of TNTU. 2011. Vol. 16. No. 3. P. 38–43.
- Luchko J. J., Leshchenko A. A. Determination of a ground fluctuation zone caused by piping / In processing of conference «Concrete bridges». Kosice, 1997. P. 298–303.
- Maday A. «In situ» testing of a long span, corrugated steel culvert used to rehabilitate a concrete frame: railway viaduct. Maday A., Vaslestad J., Janusz L. ViaCon, 1998.
- Mair R. J., Gumbel J. E., Spasojevic A. D. Centrifuge modelling of the effects of soil loading on flexible sewer liners. Journal Geotechnique. 2007. No. 4. P. 331–341.
- Vasilev S. G. Installation of underground facilities by a close method. Prom. stroitelstvo. 1988. No. 2. P. 45–49.
- Vasilev S. G., Leschenko A. V. Technological processes of horizontal workings. Lvov: Svit, 1993. 160 p.
