Settlement mechanism of unsaturated red layers embankment based on rheology and consolidation theories

LIU Jun-xin; YANG Chun-he; XIE Qiang; LIU Yu-tian

doi:10.16285/j.rsm.2015.05.008

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Settlement mechanism of unsaturated red layers embankment based on rheology and consolidation theories

更新时间：2026-06-25

- Settlement mechanism of unsaturated red layers embankment based on rheology and consolidation theories
- Vol. 36, Issue 5, Pages: 1295-1305(2015)
- 作者机构：
  
  1. 西南科技大学土木工程与建筑学院,四川,绵阳,621010
  2. 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室，湖北武汉 430071 3.西南交通大学地球科学与环境工程学院，四川成都610031
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2015.05.008
  CLC： TU411
- Online First：13 June 2018，
  
  Published：2015
- 稿件说明：
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LIU Jun-xin, YANG Chun-he, XIE Qiang, et al. Settlement mechanism of unsaturated red layers embankment based on rheology and consolidation theories[J]. 2015, 36(5): 1295-1305.
DOI：

LIU Jun-xin, YANG Chun-he, XIE Qiang, et al. Settlement mechanism of unsaturated red layers embankment based on rheology and consolidation theories[J]. 2015, 36(5): 1295-1305. DOI： 10.16285/j.rsm.2015.05.008.

摘要

路堤本体的沉降问题一直是公路和铁路路基研究解决的主要问题。路堤本体主要是非饱和土，其变形由3 部分组成，即瞬时压密产生的变形、主固结产生的变形和次固结产生的变形，但主固结和次固结并不是两个完全独立的过程，它们是相互影响的，即路堤本体的变形是非饱和固结-蠕变耦合的结果。以单轴压缩红层蠕变试验为基础，提出了非饱和单变量理论、路堤沉降计算理论；同时采用离心试验和数值模拟方法，对各种压实系数的路堤本体的沉降与填筑高度关系以及工后沉降与时间的关系进行了研究，并对工后最终沉降进行了预测，结果表明，模拟结果与离心试验数据预测的结果相符，说明该理论是正确的?

Abstract

For a long time

the settlement of embankment body is a main research problem of highway and railway roadbeds. Embankment body is mainly composed of unsaturated soils

and its deformation includes three components

namely

the deformation resulting from the instantaneous compaction

the deformations of primary consolidation and secondary consolidation deformation. However

primary and secondary consolidations influencing each other are not two completely independent processes. So the deformations of embankment body are the results of unsaturated creep and consolidation coupling. Based on the results of uniaxial compression creep test on red layers

the theories of single variable of unsaturated soil and embankment settlement of unsaturated are put forward. And at the same time

through centrifuge tests and numerical simulation of centrifuge tests

relations between settlement and fill height

post-construction settlement and time

are studied for embankment body on various compaction coefficients

and final construction settlements are predicted. Results show that the simulated results are consistent with the predicted results by the centrifugal experimental data

indicating that the theories are correct.

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Related Institution

School of Civil Engineering and Architecture, Southwest University of Science and Technology

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College of Civil Engineering and Architecture, Zhejiang University

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