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Friction piles behavior in soil base and piles settlement calculation

Vestnik MGSU 9/2018 Volume 13
  • Utkin Vladimir S. - Vologda State University (VSU) Doctor of Technical Scinces, Professor of Department of industrial and civil engineering, the honored worker of the higher school of the Russian Federation, Vologda State University (VSU), 15 Lenina st., Vologda, 160000, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 1125-1132

Subject: friction piles are calculated by the first and second group of limit states. The article describes a new method for friction pile design by the second group (by settlement) of limit state in relation to the pile foundations of buildings and structures in the urban area and in the design of extensions to existing buildings in which the value of settlement is limited or unacceptable. A new method of piles settlement calculation is different from existing method by the Building Code SP 24.13330.2011. The method is based on a new approach of the pile behavior in soil base, which is different from the existing regulations and science papers. Research objectives: the new method of pile settlement calculation is presented with the purpose of clarifying the calculation of pile bearing capacity unlike an existing method in the Building Code (SP 24.13330.2011). The basis of the design is a new idea of the pile behavior in the soil base, which differs from the existing approaches. Materials and methods: the method consists in the formation of the pile settlement only as a result of pile shortening from the compressive force by the deformation of the pile material. Results: the design equation is presented for calculation the pile settlement caused by the pile material deformation. The condition for determining the pile length is presented, which provides the pile settlement only due to the pile material deformation. Conclusion: such approach of the pile settlement calculation is necessary for the design of extensions to existing buildings, as well as new structures near existing buildings, in which the settlement value is already close to the ultimate value of settlement. The article presents the examples of pile settlement calculations obtained by various methods (including the method of the Building Code SP 24.13330.2011) for comparison of the results. The article can be used in the piles design and in the formation of new design standards for pile foundations of structures and machines.

DOI: 10.22227/1997-0935.2018.9.1125-1132

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Influence of solepieces on the displacements of horizontally loaded support bases of a contact system

Vestnik MGSU 8/2014
  • Buslov Anatoliy Semenovich - Gersevanov Research Institute of Bases and Underground Structures (NIIOSP) Doctor of Technical Science, Professor, Advisor Russian Academy of Architecture and Construction Sciences, chief research worker, Gersevanov Research Institute of Bases and Underground Structures (NIIOSP), 59 Ryazanskiy pr-t, Moscow, 109428, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Mokhovikov Evgeniy Sergeevich - Ryazan Institute (branch) of Moscow State University of Mechanical Engineering (UMech) senior lecturer, Department of Architecture and Urban Planning, Ryazan Institute (branch) of Moscow State University of Mechanical Engineering (UMech), 26/53 Pravo-lybedskaya str., Ryazan, 390000, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 44-53

The bearings of a contact system on transport, electric lines take up substantial horizontal loads both from wires and constructions holding them and also from wind, dynamic and other extraordinary influences (wire breakage, emergency situations, etc.). In case of using contact bearers with sole bases it is necessary to have sufficient strength and strain capacity reserve. For this aim solepieces with different constructive schemes are applied. The effectiveness of their application depending on their location, depth and length has not been thoroughly researched. In the article the authors offer a calculation method for horizontally loaded bearings with solepieces presented as horizontally laid beams, which are used in order to raise the deformational stability of horizontally loaded bearings. The results of comparative calculations are presented for horizontally loaded sole bearings with beams, installed in the upper and lower compressed zones of soil. The calculation results showed the efficiency of solepieces application with the aim of deformation reduction of horizontally loaded bearings as well as the possibility to optimally assign their size in order to reduce costs for their production.

DOI: 10.22227/1997-0935.2014.8.44-53

References
  1. Buslov A.C., Tulakov E.S. Raschet gorizontal'no nagruzhennykh odnostoechnykh opor po ustoychivosti [Stability Calculation of Horizontally Loaded Single Piles]. Osnovaniya, fundamenty i mekhanika gruntov [Foundations, Bases and Soil Mechanics]. 2004, no. 3, pp. 6—9.
  2. Kobrinets V.M., Barchukova T.N. Metod rascheta po deformatsiyam gruntovogo osnovaniya gorizontal'no nagruzhennogo fundamenta iz korotkoy svai-kolonny [Calculation Method of Soil Base Deformations of Horizontally Loaded Foundation of a Short Bearing Pile]. Budіvel'nі konstruktsії: zb. nauk. prats' [Building Constructions; Collection of Scientific Works]. Kiev, DPNDІBK Publ., 2008, no. 71, vol. 1, pp. 463—469.
  3. Buslov A.S., Bakulina A.A. Vliyanie kol'tsevogo ushireniya na nesushchuyu sposobnost' gorizontal'no nagruzhennoy monosvaynoy opory [Effect of a Round Cap on the Bearing Capacity of a Laterally Loaded Pile]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2012, no. 4, pp. 63—68.
  4. Bakulina A.A. Issledovanie nesushchey sposobnosti odnostoechnykh opor s ukrepleniem verkhnego sloya grunta pri gorizontal'nykh nagruzkakh [Investigation of the Bearing Capacity of Single Pile Bearings with Strengthening of the Surface Soil Layer in Case of Horizontal Loadings]. Aktual'nye problemy razvitiya nano- mikro- i optoelektroniki : trudy Vserossiyskoy konferentsii s elementami nauchnoy shkoly dlya molodezhi [Current Problems of Nano- Micro- and Optoelectronics Development : Works of All-Russian Conference with Elements of School for the Youth]. Ryazan, RITs RGRTU Publ., 2010, pp. 171—174.
  5. Poulos H.G. The Behavior of Laterally Loaded Piles. Part I: Single piles. ASCE Journal of the Soil Mechanics and Foundation Engineering Division. 1971, vol. 97, no. 5, pp. 711—731.
  6. Angel'skiy D.V. K raschetu svaynykh osnovaniy na gorizontal'nuyu nagruzku [To the Horizontal Load Calculation for Pile Foundations]. Trudy MADI [Works of Moscow State Automobile and Road Technical University]. 1937, no. 7, pp. 41—49.
  7. Golubkov V.N., Goncharov Yu.M. Issledovanie deformatsiy svay v grunte pod deystviem gorizontal'noy nagruzki [Investigation of Pile Deformation in Soil Subjected to Horizontal Load]. Izvesti vuzov. Stroitel'stvo i arkhitektura [News of the Institutions of Higher Education. Construction and Architecture]. 1958, no. 4, pp. 38—46.
  8. Luga A.A. K raschetu svaynykh fundamentov opor mostov na gorizontal'nye nagruzki [To Horizontal Load Calculation for Pile Foundations of Bridges].Sbornik trudov VNIITSa [Collection of Works of All-Russian Scientific and Project Institute of Refractory Metals and solid alloys]. Moscow, Metallurgiya Publ., 1960, no. I, pp. 37—41.
  9. Snitko N.K., Chernov V.K. Deformatsionnyy raschet i ustoychivost' szhato-izognutykh svay [Deformation Calculation and Stability of Beam Columns]. Mekhanika gruntov, osnovaniya i fundamenty : sbornik trudov LISI [Soil Mechanics, Bases and Foundations : Collection of Works of Saint-Petersburg State University of Architecture and Civil Engineering]. Leningrad, 1976, no. I (116), pp. 8—14.
  10. Buslov A.S. Rabota svay na gorizontal'nuyu nagruzku za predelami uprugosti v svyaznykh gruntakh [Horizontal Load of Piles Beyond Elasticity in Cohesive Soil]. Tashkent, FAN Publ., 1979, 106 p.
  11. Blaney G.W., O'Neill W.O. Procedures for Prediction of Dynamic Lateral Pile Group Response in Clay from Single Pile Tests. Geotechnical Testing Journal. 1991, vol. 14, no. 1, pp. 3—12. DOI: http://dx.doi.org/10.1520/GTJ10186J.
  12. Matlock H., Ingram W.B., Kelley A.E., Bogard D. Field Tests Of The Lateral-Load Behavior Of Pile Groups In Soft Clay. Proc. 12th Offshore Technology Conference. OTC 3871, Houston, TX., 1980, vol. IV, pp. 163—174.
  13. Broms B.B. Lateral Resistance of Piles in Cohesive Soils. Journal of the Soil Mechanics and Foundations Division, Proceedings of the American Society of Civil Engineers. 1964, vol. 90, no. 2, pp. 27—63.
  14. Ooi P.S., Duncan J.M. Lateral Load Analysis of Groups of Piles and Drilled Shafts. ASCE Journal of Geotechnical Engineering. 1994, vol. 120, no. 6, pp. 1034—1050.
  15. Mironov V.V. K raschetu odinochnykh svay i vysokikh svaynykh rostverkov na deystvie gorizontal'nykh sil [To Calculation of Horizontal Forces Impact on Single Piles and High Pile Grids]. Trudy LIIZhTa [Works of Petersburg State Transport University]. Leningrad, 1963, no. 207, pp. 112—156.

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