Spatiotemporal distribution of disturbed zones in Zhuhai soft clay during pile installation based on PIV

PENG Bin; LI Jiajun; HE Fan; LI Zhiwen; LI Luhai; HUANG Weihong; LIN Hongjie; LIU Jiankun

doi:10.13471/j.cnki.acta.snus.ZR20250112

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Spatiotemporal distribution of disturbed zones in Zhuhai soft clay during pile installation based on PIV

Research articles | 更新时间：2025-11-25

- Spatiotemporal distribution of disturbed zones in Zhuhai soft clay during pile installation based on PIV
- Acta Scientiarum Naturalium Universitatis Sunyatseni Vol. 64, Issue 6, Pages: 111-120(2025)
- 作者机构：
  
  1.珠海市规划设计研究院，广东珠海 519001
  2.中山大学土木工程学院，广东珠海 519082
- 作者简介：
- 基金信息：
- DOI：10.13471/j.cnki.acta.snus.ZR20250112
  CLC： TU447
- Received：22 June 2025，
  
  Accepted：12 July 2025，
  
  Published Online：29 September 2025，
  
  Published：25 November 2025
- 稿件说明：
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彭斌,李佳骏,何帆等.基于PIV的沉桩过程珠海软土扰动区时空分布[J].中山大学学报(自然科学版)(中英文),2025,64(06):111-120.

PENG Bin,LI Jiajun,HE Fan,et al.Spatiotemporal distribution of disturbed zones in Zhuhai soft clay during pile installation based on PIV[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2025,64(06):111-120.
彭斌,李佳骏,何帆等.基于PIV的沉桩过程珠海软土扰动区时空分布[J].中山大学学报(自然科学版)(中英文),2025,64(06):111-120. DOI： 10.13471/j.cnki.acta.snus.ZR20250112.

PENG Bin,LI Jiajun,HE Fan,et al.Spatiotemporal distribution of disturbed zones in Zhuhai soft clay during pile installation based on PIV[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2025,64(06):111-120. DOI： 10.13471/j.cnki.acta.snus.ZR20250112.

摘要

采用粒子图像测速技术，开展高含水率软土室内模型试验，观察不同状态的软土在沉桩不同深度时桩周土体的水平与竖向位移场发展趋势。结果表明：随着桩中心水平距离增加，桩侧土体水平位移呈明显的空间衰减规律，扰动强度和影响深度都逐渐减弱；软土含水率越高水平和竖向影响区越小，沉桩结束时软塑状态软土水平和竖向影响范围分别为3.9和1.9倍桩径，流塑状态软土水平和竖向影响范围分别为1.8和1.2倍桩径；当软土状态由软塑变为流塑时，贯入深度与水平影响区范围的关系由非线性变为线性；软塑状态软土强度更高，压力响应强烈且集中，流塑状态软土流动性更强，压力响应更加分散。

Abstract

Laboratory model tests on soft soils with high water content were conducted using particle image velocimetry（PIV） to observe the development trends of horizontal and vertical displacement fields of soil around the pile during pile driving at different depths under varying soil states. The results show that： with the increase in horizontal distance from the pile center， the horizontal displacement of soil adjacent to the pile exhibits an obvious spatial attenuation law， and both the disturbance intensity and influence depth weaken gradually；the higher the water content of soft soil， the smaller the horizontal and vertical influence zones；at the end of pile driving， the horizontal and vertical influence ranges of soft plastic soft soil are 3.9 times and 1.9 times the pile diameter， respectively， while those of fluid plastic soft soil are 1.8 times and 1.2 times the pile diameter；when the soft soil state changes from soft plastic to fluid plastic， the relationship between penetration depth and horizontal influence zone range transforms from nonlinear to linear；soft plastic soft soil has higher strength， with intense and concentrated pressure responses， whereas fluid plastic soft soil shows stronger fluidity and more dispersed pressure responses.

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references

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PENG Bin

LI Jiajun

HE Fan

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LI Luhai

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LIU Jiankun

Related Institution

Zhuhai Urban Planning Design Institute

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