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

作　　者：黄子豪 于立通 刘潇[1] 郭晓霞[3] 陈之祥 HUANG Zihao;YU Litong;LIU Xiao;GUO Xiaoxia;CHEN Zhixiang(School of Civil Engineering,Shenyang Jianzhu Univerrsity,Shengyang,Liaoning 110000,China;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics Chinese Academy of Sciences,Wuhan,Hubei 430071,China;State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,Dalian University of Technology,Dalian,Liaoning 116024,China)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110000 [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]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

出　　处：《水利与建筑工程学报》2024年第5期53-59,共7页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金(52308384)。

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e_(100)与C_(c)的经验公式和考虑含水率的I_(v)-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。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 results indicate that initial water content is a crucial factor affecting the remolded yield stress.Based on this,the applicability 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 e_(100) with C_(c) and an I_(v)-lnp compression model considering water content was established,showing good adaptability to these conditions.The findings could provide theoretical guidance and scientific 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 

分 类 号：TU411.5[建筑科学—岩土工程]