INTERACTION BETWEEN LONG PILES AND THE SOIL BODY EXPOSED TO NON-LINEAR DEFORMATIONS

Vestnik MGSU 4/2012
  • Telichenko Valeriy Ivanovich - Moscow State University of Civil Engineering (MSUCE) Doctor of Technical Sciences, Professor, Rector, +7 (495) 651-81-85, ext. 2482, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Ter-Martirosyan Zaven Grigor'evich - Moscow State University of Civil Engineering (MSUCE) +7 (499) 261-59-88, Doctor of Technical Sciences, Professor, Chair, Department of Soil Mechanics, Beddings and Foundations, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 22 - 27

Theoretical and numeral solutions to the problem of interaction between a long pile and the heterogeneous soil body are considered in the article. It has been discovered that the distribution of stresses between bottom and side sections of a pile depends on elastic and plastic properties of soils and the pile length-to-diameter ratio. Optimal geometric parameters of a pile can be derived by means of the optimal stress distribution between side and bottom sections of a pile.

The problem of interaction between a long pile and the soil body (the half-space) may be reduced to the problem of interaction between the soil body and the cylinder that has limited dimensions, namely, the diameter of and the height of where is the length of a pile. Solution to the problem in question (section 3) was also obtained through the employment of the method of finite elements (FEM) implemented in the Plaxis-2D software in the elastic and plastic environment. The graphic representation of the solution is provided in Figure 3. As expected, the results generated by analytical and numerical methods are similar both in terms of pile settlement, and in terms of stresses below the bottom end of a pile.

DOI: 10.22227/1997-0935.2012.4.22 - 27

References
  1. Timoshenko S.P., Gud'er Dzh. Teoriya uprugosti [Theory of Elasticity]. Moscow, Nauka Publ., 1975, 575 p.
  2. Ter-Martirosyan Z.G., Nguen Zang Nam. Vzaimodeystvie svay bol'shoy dliny s neodnorodnym massivom gruntov [Interaction between Long Piles and Heterogeneous Soil Body]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2008, no. 2, pp. 3—14.
  3. Ter-Martirosyan Z.G. Mekhanika gruntov [Soil Mechanics]. Moscow, ASV Publ., 2009, 550 p.

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INTERACTION OF A LONG SINGLE PILE THAT HAS A DOUBLE-LAYER BASE WITH ACCOUNT FOR COMPRESSIBILITY OF THE PILE SHAFT

Vestnik MGSU 4/2012
  • Ter-Martirosyan Zaven Grigor'evich - Moscow State University of Civil Engineering (MSUCE) , Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Trinh Tuan Viet - Moscow State University of Civil Engineering (MSUCE) postgraduate student, Department of Mechanics of Soils, Ground Foundation and Foundation Mechanics, Moscow State University of Civil Engineering (MSUCE), 26, Yaroslavskoe Shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 28 - 34

WITH ACCOUNT FOR COMPRESSIBILITY OF THE PILE SHAFT
The authors provide their solution to the problem of interaction of a long compressible pile that has a double-layer linear deformable base. The paper demonstrates that taking account of compressible properties of the pile material leads to qualitatively new distribution of shearing stresses over the surface of a cylindrical pile. It is noteworthy that increase of the pile length and stiffness of the upper section of the base raise the share of the load perceived by the surface of the pile. Besides, in particular conditions of the soil environment, the load perceived by the lower section of the base may reach approximately 20-30 % of the total load.

DOI: 10.22227/1997-0935.2012.4.28 - 34

References
  1. Ter-Martirosyan Z.G. Mekhanika gruntov [Soil Mechanics]. Moscow, ASV Publ., 2009, 550 p.
  2. Ter-Martirosyan Z.G, Nguyen Giang Nam. Vzaimodeystvie svay bol'shoy dliny s neodnorodnym massivom s uchetom nelineynykh i reologicheskikh svoystv gruntov [Interaction between Long Piles and Heterogeneous Soil Body with the Account for Nonlinear and Rheological Properties of Soils]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2008, no. 2, pp. 3—14.
  3. Ukhov S.B., Semenov V.V., Znamenskiy V.V., Ter-Martirosyan Z.G., Chernyshev S.N. Mekhanika gruntov, osnovaniya i fundamenty [Soil Mechanics, Bases and Foundations]. Moscow, ASV Publ., 2004, 566 p.
  4. Ter-Martirosyan Z.G., Trinh Tuan Viet. Vzaimodeystvie odinochnoy dlinoy svai s osnovaniem s uchetom szhimaemosti stvola svai [Interaction between a Single Long Pile and the Bedding with Account for Compressibility of the Pile Shaft]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2011, no. 8, pp. 104—111.
  5. Nguyen Giang Nam. Identification of the Settlement of the Round Die with Allowance of Its Embedding. Collected papers of the 4th International Scientific Conference of Young Scientists, Postgraduates, and Doctoral Students. Construction as Formation of the Living Environment. Moscow, MSUCE, 2006.

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