Analysis of pulling mechanism of the sleeve of large diameter Benoto piles

LIN Liang-qing; CHEN Fu-quan

doi:10.16285/j.rsm.2017.08.028

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Analysis of pulling mechanism of the sleeve of large diameter Benoto piles

更新时间：2026-06-25

- Analysis of pulling mechanism of the sleeve of large diameter Benoto piles
- Vol. 38, Issue 8, Pages: 2385-2394(2017)
- 作者机构：
  
  福州大学土木工程学院,福建,福州,350116
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.08.028
  CLC： TU473
- Online First：05 June 2018，
  
  Published：2017
- 稿件说明：
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LIN Liang-qing, CHEN Fu-quan. Analysis of pulling mechanism of the sleeve of large diameter Benoto piles[J]. 2017, 38(8): 2385-2394.
DOI：

LIN Liang-qing, CHEN Fu-quan. Analysis of pulling mechanism of the sleeve of large diameter Benoto piles[J]. 2017, 38(8): 2385-2394. DOI： 10.16285/j.rsm.2017.08.028.

摘要

目前关于贝诺特桩套管沉拔机制的研究，主要针对套管贯入过程，而对高频振动上拔套管机制的研究还不全面。采用任意拉格朗日-欧拉耦合大变形有限元ALE方法，建立套管高频振动上拔的有限元-无限元耦合模型，对套管高频振动上拔机制进行详细研究。结果表明，套管高频振动上拔过程可分为缓慢和快速上拔两阶段。在套管振动上拔过程中，土体位移、应力、孔隙比和超孔隙水压力均在管端附近突变，靠管心愈近变化愈明显。分析土体参数（土体弹性模量和管-土间摩擦系数）和振动锤参数（激振频率和激振力）对振动上拔套管的影响。土体较软、管土摩擦作用较强时，土体位移和应力变化越显著。振动锤参数仅影响套管上拔速度与土体质点速度，对土体位移和应力影响甚微；振动频率接近地基固有振动频率时，上拔阻力最小，振动振率越大，振动影响范围越小。

Abstract

Currently

most of studies on the mechanisms of driving and pulling for Benoto pile sleeve are focused on sleeve driving process. Yet

pulling by high-frequency vibration are deficient. Using the ALE (Arbitrary Lagrangian-Eulerian) method

the finite element-infinite element coupling model is developed to explore the pulling mechanism and influence of parameters on sleeve pulling. The results of numerical analysis show that the process of sleeve pulling by high-frequency vibration can be divided into two stages: the slow and the fast pulling stages. During sleeve pulling

the soil displacements

stresses

void ratio and excess pore water pressure all mutate near the sleeve end

and the change is more significant as approaching to the sleeve center. Therefore

the influence of soil parameters (including soil young’s modulus and soil-sleeve friction coefficient) and vibration hammer parameters (such as vibration frequency and vibration force) on sleeve pulling are investigated. When the soil is soft and the friction of the sleeve-soil is strong

the change of soil displacements and stresses variety are obvious. The parameters of the vibrating hammer only have influence on sleeve pulling speed and soil particle velocity

and hardly have any effect on soil displacements and stresses. When the vibration frequency is close to the natural frequency of soil layers

the pulling resistance is the small. The larger the vibration frequency is

the smaller the influence range of vibration.

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