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Analysis of Soil Compacting Effect of Jacked Pile

Author: FengXu
Tutor: ZhaoDong
School: Xi'an University of Architecture and Technology
Course: Engineering Mechanics
Keywords: jacked pile soil plug effect pipe pile cavity expansion method unified solution
CLC: TU473.1
Type: Master's thesis
Year: 2011
Downloads: 56
Quote: 0
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Abstract


Jacked pile now has been widely applied in engineering now. Jacked pile is displacement pile, The prominent problem is that during the penetration of the pile into soils obvious compacting effects in soils around the pile takes place and this effects the engineering environment seriously.In this paper, research on soil compacting effect of jacked pile was carried out by analytical solutions and numerical analysis ,when considering soil plug of the pipe pile. Main tasks were as follows:1. Jacked pile penetration characteristic of cohesive soil and the sandy are analyzed, then giving the merits and faults between traditional plane Cavity Expansion Method(CEM) and spatial cylindrical CEM.2. A unified analytical solution of cavity expansion theory is derived when considering soil plug of the pipe pile.3. With reference to soil plug data, the effect of the ratio of inner and outer diameter on Tresca materials stress and displacement fields is analyzed for the column hole expansion when the soil plug is considered in Yuhuangge engineering. In the piling process, when the ratio of the diameter increases, the radial displacement, radial stress, expansion pressure and the excess pore water pressure were decreased, and the differences of these parameters are also compared under the influence of soil plug.4. The finite element method is used to simulate the stress field and displacement field of the jacked Pile. The change rules of the stress field and displacement field is obtained, and it is also discussed by considering the ratio of inner and outer diameter of the pipe pile under different circumstances.

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Foundation > Pile foundation and deep foundation > Pile
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