Analytical analysis for consolidation of composite foundation reinforced by permeable and impermeable piles

YU Chun-liang; ZHANG Ai-jun; ZHAO Qing-yu; WANG Yu-guo

doi:10.16285/j.rsm.2017.11.022

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Analytical analysis for consolidation of composite foundation reinforced by permeable and impermeable piles

更新时间：2026-06-25

- Analytical analysis for consolidation of composite foundation reinforced by permeable and impermeable piles
- Vol. 38, Issue 11, Pages: 3255-3260(2017)
- 作者机构：
  
  西北农林科技大学水利与建筑工程学院，陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.11.022
  CLC： TU473
- Online First：05 June 2018，
  
  Published：2017
- 稿件说明：
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YU Chun-liang, ZHANG Ai-jun, ZHAO Qing-yu, et al. Analytical analysis for consolidation of composite foundation reinforced by permeable and impermeable piles[J]. 2017, 38(11): 3255-3260.
DOI：

YU Chun-liang, ZHANG Ai-jun, ZHAO Qing-yu, et al. Analytical analysis for consolidation of composite foundation reinforced by permeable and impermeable piles[J]. 2017, 38(11): 3255-3260. DOI： 10.16285/j.rsm.2017.11.022.

摘要

在深厚软土地基处理中，联合使用透水与不透水桩，既可以加速地基固结，又能较大地提高地基的承载力，具有广泛的应用价值。基于轴对称固结模型，并考虑透水桩的体积压缩，建立了透水与不透水桩组合型复合地基的固结微分方程，利用边界条件和初始条件，得到了外部荷载瞬时施加情况下的地基固结解析解，并将该解与现有解析解进行对比分析，验证其合理性；同时，对桩的扰动效应、井阻效应、压缩模量等影响因素进行了分析，探讨了该复合地基的固结特性。结果表明：不考虑透水桩体积变化将高估组合型复合地基的固结速率；减小透水桩的井阻效应和施工扰动效应，增大置换率及桩体模量，将加快组合型复合地基的固结速率，实际工程中可以从这些方面减少地基的工后沉降。

Abstract

The composite foundation with permeable and impermeable piles can promote the consolidation process of soft soil

and enhance the strength of foundation

implying practical applications for the soft ground treatment. Based on the axisymmetric consolidation model

a differential equation governing the consolidation of combined composite foundation subjected to an instant loading is established

considering the volume compression of the permeable pile. The analytical solution is derived for given initial and boundary conditions. Then

the solution is verified through the comparison with the existing solution. The main influencing factors such as disturbance effect

well resistance effect and compression modulus are analyzed to explore the consolidation behavior of composite foundation. The results show that the consolidation rate of the combined composite foundation will be overrated without considering the volume change of the permeable columns. The consolidation rate can be accelerated by reducing the effects of well resistance and the disturbance effect of permeable column or increasing the replacement ratio and the compression modulus

reducing the post-construction settlement in practical applications.

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