Study into the significance of individual elements in a piled-raft foundation
https://doi.org/10.37538/2224-9494-2022-3(34)-134-143
Abstract
Introduction. The prospects of using piled-raft foundations to support the columns of frame buildings and civil engineering works are examined.
Aim. To determine the significance and role of individual elements in a piled-raft foundation and its underlying soil to achieve the maximum load capacity.
Materials and methods. In order to achieve the stated aim, a series of theoretical numerical studies into horizontally loaded piled-raft foundations was conducted. Here, three-level numerical studies were used to determine the effect of various factors on the load capacity of piled-raft foundations under horizontal and moment loading. The following factors were considered in this work: coefficient of soil reaction around the column pedestal ku; coefficient of near-pile soil reaction kp; transverse dimension of the column pedestal du; pedestal height lu; inclination angle of the pile to the vertical αP. The significance of each factor was assessed in terms of the column pedestal displacement at the soil surface level, which is described by a quadratic polynomial in five variables.
Results. The impact on foundation resistance to horizontal loading can be determined by analyzing the absolute values of polynomial coefficients and the extent to which the considered factors affect the horizontal pedestal displacement in piled-raft foundations under horizontal and moment loading at the soil surface level. It is established that the most significant factors contributing to the foundation resistance to horizontal loading include the coefficient of soil reaction around the column pedestal ku and the transverse dimension of the column pedestal du (increasing the foundation resistance to horizontal loading by 60% and 35%, respectively). The other factors have a significantly lower impact.
Conclusions. It is shown that numerical theoretical studies into horizontally loaded piled-raft foundations reveal the significance and role of its individual elements and underlying soil, as well as justifying the values of factors affecting the load capacity of foundations.
About the Authors
N. E. Urmanshina
Ufa State Petroleum Technological University
Russian Federation
Russian Federation
Nataliia E. Urmanshina, Cand. Sci. (Engineering), Associate Professor, Associate Professor of the Highway and Construction Technology Department
450064, Ufa, Kosmonavtov str., 1
tel.: +7 (917) 347-62-40
Z. R. Mukhametzyanov
Ufa State Petroleum Technological University
Russian Federation
Russian Federation
Zinur R. Mukhametzyanov, Dr. Sci. (Engineering), Associate Professor, Professor of the Highway and Construction Technology Department
450064, Ufa, Kosmonavtov str., 1
tel.: +7 (917) 780-35-05
References
1. Mukhametzyanov Z.R., Gusev E.V. A modern approach to modeling the technology of construction of industrial facilities. Promyshlennoe i grazhdanskoe stroitel’stvo = ndustrial and Civil Engineering. 2012;(10):68–69 (in Russian).
2. Gusev E.V., Mukhametzyanov Z.R., Razyapov R.V. Technique for Determination of Rational Boundaries in Combining Construction and Installation Processes Based on Quantitative Estimation of Technological Connections. IOP Conference Series: Materials Science and Engineering (MSE). 2017;262:012140. https://doi.org/10.1088/1757-899x/262/1/012140
3. Gotman A.L. Calculation of combined pile foundations on the action of horizontal load and bending moment. Osnovaniya, fundamenty i mekhanika gruntov = Soil Mechanics and Foundation Engeneering. 2015;(4):23–27 (in Russian).
4. Gotman A.L. Experimental studies of the operation of combined pile foundations on the action of a horizontal load. Osnovaniya, fundamenty i mekhanika gruntov = Soil Mechanics and Foundation Engeneering. 2014;(3):2–6 (in Russian).
5. Khabibullin S.Yu., Khabibullina N.N. Numerical studies of the optimal dimensions of combined pile foundations. Sovremennye naukoemkie tekhnologii Modern high technologies. 2018;(9):120–125 (in Russian).
6. Yakovlev P.I., Gotman A.L., Kurmaev R.G. Interaction of structures with soil and pile foundations. Odessa: Astroprint Publ.; 2004 (in Russian).
7. Gotman A.L. Development, research and implementation of effective foundations and methods of their design. In: Collection of scientific works of BashNIIstroy. Ufa; 1996, p. 9–26 ( in Russian).
8. Gotman A.L., Urmanshina N.E., Galeev R.G. Substantiation of a rational design and design scheme for a horizontally loaded combined pile foundation. In: Tr. Int. conf. “Geotechnics – science and practice” according to modern. problems fur. soils and foundation engineering, dedicated to the memory of B.I. Dalmatova. Saint Petersburg; 2000, p.159–166 (in Russian).
9. Urmanshina N.E. Study of the operation of combined pile foundations for horizontal load in clay soils [dissertation]. Ufa; 2001 (in Russian).
10. Adler Yu.P., Markova E.V., Granovsky Yu.V. Planning an experiment in the search for optimal conditions. Moscow, Nauka Publ.; 1976 (in Russian).
11. Brodsky V.Z., Brodsky L.I., Golikova T.I. Tables of experimental plans for factorial and polynomial models (reference edition). Moscow: Metallurgiya Publ.; 1982 (in Russian).
Review
For citations:
Urmanshina N.E., Mukhametzyanov Z.R. Study into the significance of individual elements in a piled-raft foundation. Bulletin of Science and Research Center of Construction. 2022;34(3):134-143. (In Russ.) https://doi.org/10.37538/2224-9494-2022-3(34)-134-143
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