水利与建筑工程学报2024,Vol.22Issue(5) :53-59.DOI:10.3969/j.issn.1672-1144.2024.05.008

近海红黏填土的固结特性与预测模型研究

Consolidation Characteristics and Prediction Modeling of Offshore Red Clay Fills

黄子豪 于立通 刘潇 郭晓霞 陈之祥
水利与建筑工程学报2024,Vol.22Issue(5) :53-59.DOI:10.3969/j.issn.1672-1144.2024.05.008

近海红黏填土的固结特性与预测模型研究

Consolidation Characteristics and Prediction Modeling of Offshore Red Clay Fills

黄子豪 1于立通 2刘潇 2郭晓霞 3陈之祥4
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作者信息

  • 1. 沈阳建筑大学 土木工程学院,辽宁 沈阳110000;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
  • 2. 沈阳建筑大学 土木工程学院,辽宁 沈阳110000
  • 3. 大连理工大学 工业装备结构分析优化与CAE软件全国重点实验室,辽宁 大连116024
  • 4. 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
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摘要

为研究大连金州湾海上填土机场用土的固结特性,防止出现不规则沉降,开展在含盐环境下不同含水率重塑红黏土的固结试验,分析含水状态对红黏土变形特性的影响规律,在此基础上,验证5种固结模型在含盐环境下对红黏土的适用性.分析结果表明:初始含水率是影响重塑黏土压缩特性的重要因素,初始含水率越高,压缩曲线的斜率变化最为明显;在较大的固结压力条件下,不同初始含水率试样的压缩曲线斜率趋于一致,但不同含水率下重塑土压缩后的孔隙比仍有较大差距;已有的黏土非线性压缩模型并不适用于高含水率和含盐环境下的红黏土;结合已有的孔隙指数概念,重新建立了固有压缩指数e100与Cc的经验公式和考虑含水率的Iv-lnp压缩模型,该模型对高含水率和含盐环境下的黏土具有较好适应性.

Abstract

To analyze the consolidation characteristics of reclamation soil for Dalian Jinzhou Bay offshore airport and prevent irregular settlement,consolidation tests on Dalian red clay with different water contents in a saline environment were conducted.The influence of water content on the deformation characteristics of the red clay was analyzed,the re-sults indicate that initial water content is a crucial factor affecting the remolded yield stress.Based on this,the applica-bility of five consolidation models to red clay in a saline environment was verified.The results show that initial water content significantly affects the compression characteristics of remolded clay.Higher initial water content leads to more pronounced changes in the compression curve's slope.While the slopes tend to converge under higher consolidation pressures,the void ratios after compression still vary significantly with different water contents.Existing clay nonlinear compression models are unsuitable for red clay in high water content and saline environments.An empirical formula combining the inherent compression index e100 with Cc and an Iv-lnp compression model considering water content was established,showing good adaptability to these conditions.The findings could provide theoretical guidance and scientif-ic reference for offshore reclamation projects in high water content and saline environments.

关键词

重塑试样/压缩系数/压缩模型/孔隙指数/含盐环境/高含水率

Key words

remodeling specimens/compression coefficient/compression model/porosity index/saline environment/high moisture content

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基金项目

国家自然科学基金(52308384)

出版年

2024
水利与建筑工程学报
西北农林科技大学

水利与建筑工程学报

影响因子:0.383
ISSN:1672-1144
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