Address: 17 Naberezhnaya Severnoy Dviny, Arkhangelsk 163002 Russian Federation. Northern (Arctic) Federal University named after M.V.Lomonosov. Office 1425

Phone / Fax: (818-2) 21-61-18
E-mail: forest@narfu.ru
http://lesnoizhurnal.ru/en/

RussianEnglish



Archive

Theoretical Justification of the Holding Power of a Mobile Anchor for Holding Timber-Rafting Objects. C. 141-151

Версия для печати
Creative Commons License
These works are licensed under a Creative Commons Attribution 4.0 International License.

S.V. Posypanov, K.V. Kozlov

Complete text of the article:

Download article (pdf, 0.8MB )

UDС

627.142.2

DOI:

10.37482/0536-1036-2024-1-141-151

Abstract

Exploitation of small and medium-sized rivers for wood transportation ensures the economic availability of wood raw materials located at a great distance from consumers. Short-term operation of timber rafting facilities and their movement from one place to another is typical for these rivers. At such facilities, the use of mobile fillable anchors is considered to be the most appropriate. The article provides a brief description of their design, installation and dismantling. The fabrication and effective application of such anchors requires appropriate justification of their parameters (the holding power, in particular). The purpose of this study is to develop the scientific basis for determining the holding power and effective application of these anchors. A theoretical justification for the process of interaction of the proposed anchor with the soil mass has been carried out. On the basis of this justification, two alternative formulas were obtained to determine the holding power provided by one section of the grouser. Calculations using these formulas give similar results. The dependences of the holding power on the determinants, such as the vertical load on one section of the grouser transmitted from the containers being filled, the coefficient of friction of the anchor material on the soil, the density of the soil, the coefficient of its internal friction and the depth of penetration of the grousers into the soil are approximately the same. Similar properties of these formulas allow to consider them reliable. The total holding power of the anchor is calculated according to the weight of the filled containers, the holding power of one section of the grouser and their number. The degree and nature of the influence of the determinants on the holding power of a mobile fillable gravity anchor have been established. An increase in any of them leads to an increase in the holding power. The most significant determinant is the vertical load on one section of the grouser. The dependence of the holding power on it is linear. To a lesser extent, in descending order, the angle of the internal friction of the soil, the coefficient of friction of the anchor material on the soil, and the density of the soil influence the holding power. The dimensions of the grouser and their change have little effect, but the very fact of their presence provides a sizeable proportion of the holding power of the anchor.

Authors

Sergey V. Posypanov*, Doctor of Engineering, Prof.; ResearcherID: ABF-6542-2021,
ORCID: https://orcid.org/0000-0003-0600-7089
Konstantin V. Kozlov, Postgraduate Student; ResearcherID: JFA-2045-2023,
ORCID: https://orcid.org/0009-0003-8892-5867

Affiliation

Northern (Arctic) Federal University named after M.V. Lomonosov, Naberezhnaya Severnoy Dviny, 17, Arkhangelsk, 163002, Russian Federation; s.posypanov@narfu.ru*, kozlovkonstantin94@gmail.com

Keywords

timber rafting, anchor, mobile anchor, floating structures, raft holding, holding power

For citation

Posypanov S.V., Kozlov K.V. Theoretical Justification of the Holding Power of a Mobile Anchor for Holding Timber-Rafting Objects. Lesnoy Zhurnal = Russian Forestry Journal, 2024, no. 1, pp. 141–151. (In Russ.). https://doi.org/10.37482/0536-1036-2024-1-141-151

References

  1. Taskaev V.G. A Device for Shore Anchorage of Floating Structures. USSR, no. SU 1523508А1, 1989. (In Russ.).
  2. Taskaev V.G., Cheshkov G.G. A Device for Shore Anchorage of Floating Structures. USSR, no. SU 1548321А1, 1990. (In Russ.).
  3. Vikharev A.N. Calculation of the Shape of the Prism of Soil Protrusion during Vertical Displacement of a Round-Shaped Anchor Using the Quasi-Potential Modeling Method. Improving Equipment and Technologies for Logging and Wood Transportation: Collection of Scientific Papers of the Faculty of Natural Resources of ASTU. Arkanglelsk, ASTU, 2010, iss. 4, pp. 80–86. (In Russ.).
  4. Vikharev A.N., Gagarin P.N. Quasi-Potential Modeling of the Mechanical Characteristics of the Anchor Operating in the Soil Mass. Improving Equipment and Technologies for Logging and Wood Transportation: Collection of Scientific Papers of the Faculty of Natural Resources, Dedicated to the 70th Anniversary of ASTU and the Faculty of Natural Resources. Arkhangelsk, ASTU, 1999, pp. 73–83. (In Russ.).
  5. Eurocube. The Website of “The Successful Greenhouse Plant”. (In Russ.). https://tepli4ki.ru/
  6. Kozlov K.V., Belyaev N.S., Posypanov S.V. Assessment of the Holding Power of Mobile Fillable Gravity Anchors. Current Scientific Research in the Modern World, 2021, no. 11-11(79), pp. 19–23. (In Russ.).
  7. Kozlov K.V., Belyaev N.S., Posypanov S.V. Analysis of Anchoring of Timber-Rafting Facilities for Short Navigation Periods. Innovations. Science. Education, 2021, no. 36, pp. 1543–1546. (In Russ.).
  8. Kozlov K.V., Posypanov S.V. The Use of Mobile Fillable Anchors for Holding the Floating Objects in Timber Rafting. Innovations. Science. Education, 2020, no. 23, pp. 541–545. (In Russ.).
  9. Mitrofanov A.A. Scientific Justification and Development of an Environmentally Safe Rafting. Arkhangelsk, ASTU Publ., 1999. 268 p. (In Russ.).
  10. Mitrofanov A.A. Timber Rafting. New Technologies, Scientific and Technical Support: monograph. Arkhangelsk, ASTU Publ., 2007. 492 p. (In Russ.).
  11. Surov G.Ya., Vikharev A.N., Likhachev S.E., Emel’yanov A.A. The anchor for holding the floating structures to the shore. Patent RF, no. RU 119757U1, 2012. (In Russ.).
  12. Patyakin V.I., Dmitriev Yu.Ya., Zaytsev A.A. Water Log Movement. Moscow, Lesnaya promyshlennost’ Publ., 1985. 336 p. (In Russ.).
  13. Technical Tables, 2006. (In Russ.). https://tehtab.ru/
  14. Tsytovich N.A. Mechanics of Soils.: 4th ed., revised and enlarged. Moscow, Vyshaya shkola Publ., 1983. 288 p. (In Russ.).
  15. Ambrose J. Simplified Design of Masonry Structures. New York, John Wiley and Sons, 1991. pp. 70–75.
  16. Baker W.H., Kondner R.L. Pullout Load Capacity of a Circular Earth Anchor Buried in Sand. National Academy of Sciences, Highway Research Record, 1966, no. 108, pp. 1–10.
  17. Craig R.F. Soil Mechanics. 6th ed. London, New York: E & FN Spon, 1997. 485 р.
  18. Heibig C. Künstliche Anker beim Seilkraneinsatz State of the Art. Zürich, ETHZ D-WAHO Forstliches Ingenierurwesen, 1997. 44 p.
  19. Verruijt A. Soil Mechanics. Delft University of Technology, 2012. 331 p.
  20. Yam K.L. The Wiley Encyclopedia of Packaging Technology. John Wiley & Sons, 2009. 1376 p. https://doi.org/10.1002/9780470541395


 

Make a Submission


ADP_cert_2024.png

Lesnoy Zhurnal (Russian Forestry Journal) was awarded the "Seal of Recognition for Active Data Provider of the Year 2024"

INDEXED IN: 

scopus.jpg

DOAJ_logo-colour.png

logotype.png

Логотип.png