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| 污染物在二层非饱和土中运移过程综合分析 | |
| 引用本文： | 张金利,杨庆,李志刚,王丽燕.污染物在二层非饱和土中运移过程综合分析[J].大连理工大学学报,2011,51(4):574-580. |
| 作者姓名： | 张金利 杨庆 李志刚 王丽燕 |
| 作者单位： | 1. 大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 大连理工大学土木工程学院岩土工程研究所,辽宁大连116024 2. 大连水泥集团有限公司,辽宁大连,116033 3. 大连大学信息工程学院,辽宁大连,116622 |
| 基金项目： | 国家自然科学基金资助项目(50979713) |
| 摘 要： | 假设填埋场下部为具有压实黏土衬里（CCL）、下卧土层及含水层的三层结构体系,基于Richards方程,在稳态渗流下,得到了CCL与下卧土层体积含水率的解析解.依据污染物在多孔介质中运移机制,建立了污染物在包含两层非饱和土层的三层结构体系中运移的一维计算模型.在计算模型中分别考虑了CCL的非线性吸附特性、污染物运移过程中的生物降解特性、垃圾的生物降解特性等.采用所建立的数学模型,对某一假想填埋场进行了具体计算,通过变动参数计算与分析,探讨了各种因素对污染物运移的影响.计算结果表明,非饱和土层的吸附与生物降解可显著影响污染物运移,特别是CCL的吸附与生物降解特性影响更为显著,为污染物运移的控制因素.非饱和土的体积含水率较大时,含水率变化对污染物运移影响较小. |
| 关 键 词： | 非饱和土 污染物运移 生物降解 非线性吸附 |
Comprehensive analysis of contaminant migration in two layers of unsaturated soils |
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| ZHANG Jinli,YANG Qing,LI Zhigang,WANG Liyan.Comprehensive analysis of contaminant migration in two layers of unsaturated soils[J].Journal of Dalian University of Technology,2011,51(4):574-580. | |
| Authors: | ZHANG Jinli YANG Qing LI Zhigang WANG Liyan |
| Institution: | ZHANG Jin-li1,2,YANG Qing1,LI Zhi-gang3,WANG Li-yan4(1.State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China,2.Institute of Geotechnical Engineering,School of Civil Engineering,3.Dalian Cement Group Co.,Ltd.,Dalian 116033,4.Information and Engineering College,Dalian University,Dalian 116622,China) |
| Abstract: | The landfill site was idealized as three-layer stratum composed of a compacted clay liner(CCL),a underlying layer and a layer of aquifer below the landfill.Based on Richards equation,the analytical solutions of volumetric water content in both CCL and underlying layer were obtained under steady-state seepage.According to the contaminant migration mechanism in the porous media,the one-dimensional computing model was established for contaminant migration in the three-layer strata including two unsaturated soi... |
| Keywords: | unsaturated soil contaminant migration bio-degradation nonlinear sorption |
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