期刊论文

Cai, Guang-Hua(caiguanghua@seu.edu.cn)

中文

东北大学学报(自然科学版)

1005-3026

2017

38

6

874-879

10.3969/j.issn.1005-3026.2017.06.023

国家自然科学基金资助项目（51279032）； 国家“十二五”科技支撑计划项目（2012BAJ01B02）； 中央高校基本科研业务费专项资金； 江苏省普通高校研究生科研创新计划资助项目（KYLX0147）；

本校为其他机构

开展了室内压实黏土体模型柱试验,研究了温度梯度作用对压实黏土水热迁移和渗透性的响应规律.结果表明:热量在黏土柱下部比黏土柱上部传输快,温度的升高随离热源距离的增加而明显延迟;底部热源促使压实黏土柱产生温度梯度,进而促使水汽在黏土柱内由底向上迁移,造成水分损失较快;随热源的持续作用,黏土柱内温度梯度逐渐下降,水汽迁移速率减小,含水率下降缓慢并趋于稳定.热源持续作用使土柱上表面开裂程度明显大于下底面,用示踪剂来粗略测量裂缝深度是可行的.温度梯度作用不同程度地增大了黏土体的渗透系数,且黏土柱的两端渗透系数增加较快,中间部分增大倍数次之.

Through the indoor model experiments, the response laws of the moisture-heat migration and permeability of compacted clay were studied under the temperature gradient. The results demonstrated that: the heat transmitted relatively faster at the bottom of clay column than the upper of clay column; the rise of the temperature underwent an obvious delay with the increase of the distance from the heat source; the heat at the bottom facilitated the occurrence of the temperature gradient inside the compacted clay column, which further prompted the moi...