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Study on the Property of Passive-pile in Wharf Bank and the Interaction Between the Slope and Piles

Author: LiangFengShou
Tutor: HeGuangChun
School: Chongqing Jiaotong University
Course: Port, Coastal and Offshore Engineering
Keywords: Pier slope Pile Interaction Finite Element Method Pile-soil nonlinear contact
CLC: U656.1
Type: Master's thesis
Year: 2010
Downloads: 86
Quote: 1
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Abstract


Three Gorges reservoir water level luffing as large slope topography and complex geological conditions and other special hydrogeological conditions, the formation of terminal building tall artificial backfill ramp or slope and pile trestle composite structure in the form of more recent years due to backfill the formation of a larger pile wharf slope causing deviation of Projects has appeared more than. In this paper, emerging engineering problems, passive piles on the wharf slope characteristics and slope - pile interaction Expand the following: Firstly, for a simplified system of slope pile interaction finite element model was established using the frictional contact to pile interaction simulation contact nonlinearity calculated and analyzed under the thrust of the soil pile work traits, the results show that even its own slope safety factor is higher than 1.25, but the bank soil deformation caused by the displacement of pile and internal forces still can not be ignored, rock pile at the interface boundary force most unfavorable. Univariate analysis method using pile force influencing factors analysis, the results showed that: the higher the passive soil strength and displacement pile bending moment is smaller, the greater the contrary, it was seriously force and displacement piles on the soil internal friction angle change impacts are more sensitive than cohesion; bending moment loads on top of the hill and the displacement of the existence of a critical value, the critical value is not obvious, exceeds the critical value affects significantly increased; increasing pile of pile-soil relative stiffness increases body bending displacement decreases, but the pile-soil relative stiffness decreases, bending moment and displacement is reduced to a lesser extent a greater degree increased; slope gradient increases both force and displacement piles sustained increase , while the pile of soil and pile displacement difference becomes larger, the soil a \Combines a dock Three Gorges Project, the finite element analysis of slope with ramps pile interaction bank soil deformation discussed the impact on the pile and pile the presence of slope stability was improved; contrast the top of the pile pile freedom and constraint by continuous rail beam pile in both cases the force and displacement pile, the results indicate that the formation of a continuous rail beam and the overall framework pile after pile situation will force a large degree of improvement and pile displacement significantly reduced; For engineering examples, we propose two slope pile load shedding program and verified through finite element analysis of the program's effectiveness and rationality, can provide reference for similar projects.

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CLC: > Transportation > Waterway transport > Port projects > Port of hydraulic structures > Pier
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