垃圾填埋体中非饱和-饱和渗流分析

被引:12
作者
张文杰
詹良通
陈云敏
魏海云
机构
[1] 浙江大学岩土工程研究所
基金
国家自然科学基金重点项目;
关键词
渗流力学; 垃圾填埋体; 水分运移; 中间覆盖层; 非饱和-饱和渗流;
D O I
暂无
中图分类号
TU411.4 [土的渗透性试验];
学科分类号
081401 ;
摘要
结合苏州七子山垃圾填埋场的工程项目,通过室内试验量测垃圾饱和渗透系数和土-水特征曲线,推导其渗透性函数,考虑存在中间覆盖层和截洪沟失效的情况,通过对垃圾填埋体中非饱和-饱和渗流分析,研究填埋单元内的水分运移规律以及中间覆盖层上局部滞水的形成规律。计算结果表明:填埋体中非饱和区域的基质吸力大多保持在3~6kPa,对应的垃圾体积含水量为35%~40%,与实测含水量一致,说明推导出的渗透性函数可用于垃圾的非饱和-饱和渗流分析;中间覆盖层的存在可以大大降低雨水入渗量,但当截洪沟失效时,中间覆盖层是造成局部滞水的重要原因,计算得到的水位与现场测试结果相吻合。
引用
收藏
页码:87 / 93
页数:7
相关论文
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