2-D Biot consolidation FEM Analysis of subgrade improved by combined drainage and reinforcement cushion

CAI Xiao-guang; LIU Han-long

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2-D Biot consolidation FEM Analysis of subgrade improved by combined drainage and reinforcement cushion

更新时间：2026-06-25

- 2-D Biot consolidation FEM Analysis of subgrade improved by combined drainage and reinforcement cushion
- Vol. 29, Issue 8, (2008)
- 作者机构：
  
  河海大学岩土力学与堤坝工程教育部重点实验室/岩土工程科学研究所,南京,210098
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU443
- Online First：02 August 2013，
  
  Published：2008
- 稿件说明：
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CAI Xiao-guang, LIU Han-long. 2-D Biot consolidation FEM Analysis of subgrade improved by combined drainage and reinforcement cushion[J]. 2008, 29(8).
DOI：

CAI Xiao-guang, LIU Han-long. 2-D Biot consolidation FEM Analysis of subgrade improved by combined drainage and reinforcement cushion[J]. 2008, 29(8). DOI：

摘要

复合加筋排水褥垫是针对沿海缺砂地区开发的，具有水平排水与加筋作用的一项新型专利技术，可取代软基加固中的排水砂垫层。采用二维平面应变Biot固结有限元模型对复合加筋排水褥垫软土路堤进行了数值模拟，结果表明复合加筋排水褥垫可以满足水平排水要求，另外与传统的水平排水砂垫层相比，该技术可降低地基附加正应力和超孔隙水压力，有效抑制路基侧向变形的发展，减小路基沉降与不均匀沉降，提高路基稳定性，加筋效果显著。

Abstract

The combined drainage and reinforcement cushion (CDRC) is a newly-developed proprietary technology which aims at coastal areas short of sand

is used for horizontal drainage and reinforcement in soft ground treatment and can replace horizontal dewatering sand cushion. The behavior of subgrade improved by CDRC has been analyzed by 2-D Biot consolidation plane strain finite element method. The result shows that the drainage capacity of CDRC can meet the requirement for drainage. Besides

it also shows that the technique can applied to lower foundation additional normal stress and excess pore water pressure

restrain the lateral deformation of foundation effectively

decrease vertical settlement and differential settlement of soft foundation and improve the foundation stability with remarkable effect compared with the traditional horizontal dewatering sand cushion.

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