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浙江大学学报(工学版)
J4  2014, Vol. 48 Issue (3): 478-486    DOI: 10.3785/j.issn.1008-973X.2014.03.015
土木、水利工程     
填埋垃圾渗透特性室内外测试研究
詹良通1, 徐辉1, 兰吉武1, 刘钊1,2, 陈云敏1
1. 浙江大学 软弱土与环境土工教育部重点实验室,浙江 杭州 310058；2. 宁波市北仑区城市管理局,浙江 宁波 315899
Field and laboratory study on hydraulic characteristics of MSWs
ZHAN Liang-tong1, XU Hui1, LAN Ji-wu1, LIU Zhao1,2, CHEN Yun-min1 
1. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China;
2. Beilun Urban Management Bureau, Ningbo 315899, China
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摘要：

以苏州市七子山生活垃圾卫生填埋场为工程背景,开展了填埋垃圾渗透系数现场和室内测定试验,现场试验结果表明：垃圾填埋体中抽水井抽水影响半径为25～33 m,单井产流量为14.4～26.9 m3/d,15.5～17.5 m埋深范围内垃圾渗透系数介于2.4×10-6～5.5×10-6 m/s之间；室内试验结果表明:有效应力是影响填埋垃圾渗透系数的关键因素,2.5～17.5 m埋深范围内垃圾渗透系数介于1.4×10-7～5.5×10-6 m/s之间；上述2种试验结果均表明,垃圾渗透系数随埋深的增大呈显著减小趋势；由于垃圾堆体中各向异性和优势流现象的存在,相同深度渗透系数现场与室内测试结果比值为15～25.建议在高渗滤液水位的填埋场进行竖井降水方案和导排系统的设计时,在选择合理的竖井结构的同时,考虑填埋垃圾渗透性能的特征.
Abstract:

Hydraulic property of municipal solid wastes (MSWs) is one of the key parameters that influence leachate flows within landfills. The hydraulic conductivity of MSWs in Qizishan Landfill was measured in both laboratory and field tests. The following conclusions were drawn: (1) The results from the pumping tests show an influence radius of vertical well between 25-33 m, a flow rate 14.4-26.9 m3/d for single well, and a hydraulic conductivity of 2.4×10-6 -5.5×10-6 m/s for the wastes buried at the depths of 15.5-17.5 m; (2) The laboratory test results demonstrate that the effective stress  influences the hydraulic conductivity most significantly among all factors, and the measured hydraulic conductivity is between 1.4×10-7-5.5×10-6 m/s at the depths of 2.5-17.5 m; (3) Both laboratory and field study demonstrates a decreasing trend of hydraulic conductivity with an increase in the burial depth of wastes; (4) The hydraulic conductivity obtained from the field tests is 15-25 times higher than that from the lab tests,  due to the anisotropy and preferential flow existing in the landfill body. Thus, reasonable well structure and above-mentioned hydraulic characteristics of MSWs should be taken into consideration in the design of drainage and drawdown system for landfills with high leachate mound．
出版日期: 2018-06-10
:  TV 139.1  
基金资助:

国家“973” 重点基础研究发展规划资助项目（2012CB719802）.
作者简介: 詹良通（1972-），男，教授、博导，主要从事非饱和土力学、环境岩土工程和边坡工程等方面的教学和科研工作.E-mail：zhanlt@zju.edu.cn
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引用本文:

詹良通, 徐辉, 兰吉武, 刘钊, 陈云敏. 填埋垃圾渗透特性室内外测试研究[J]. J4, 2014, 48(3): 478-486.

ZHAN Liang-tong, XU Hui, LAN Ji-wu, LIU Zhao, CHEN Yun-min. Field and laboratory study on hydraulic characteristics of MSWs. J4, 2014, 48(3): 478-486.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2014.03.015    或    http://www.zjujournals.com/eng/CN/Y2014/V48/I3/478

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