城市固体废弃物持水率的室内实验研究  

Experimental study on water holdup of municipal solid waste

作　　者：涂帆[1] 柯秋菊 解仲明[1] 高文银[1] 肖朝昀[1] 

机构地区：[1]华侨大学土木工程学院,泉州362021

出　　处：《环境工程学报》2010年第12期2860-2864,共5页Chinese Journal of Environmental Engineering

基　　金：福建省自然科学基金计划资助项目(2009J05126);厦门市科技局项目(3502Z20083042)

摘　　要：垃圾土持水率是估算填埋场淋沥液高度和分析填埋体稳定性的重要参数。通过对高压固结仪的改造,研制垃圾土持水率的室内实验仪器,并在该仪器上对取自我国南方某填埋场3个不同深度的大直径垃圾土试样进行各级荷载下的持水率实验。研究结果表明,随填埋深度增大,垃圾年份增加,垃圾土可降解度降低,腐殖质含量增大,垃圾土的持水率减小;随上覆压力增大,干重和湿重持水率减小,当上覆压力增大到一定程度,减小趋势变缓;随上覆压力的增大,体积持水率一般呈减小的趋势,但对于疏松垃圾土,在较小的压力下,体积持水率有增大的趋势,当压力增大到一定程度,则随压力的增大而减小;随干密度的增大,垃圾土干重和湿重持水率均减小。提出的垃圾土持水率的室内实验方法和研制的仪器合理可行。Water holdup of municipal solid waste（MSW）is critical important in determining the leachate level and analyzing the stability of landfill.Laboratory tests on water holdup at different pressures were conducted by using a modified high pressure oedometer on three specimens sampled at different depths of a landfill in southern China.The results showed that with the increase of sampling depth and the age of MSW,the degradable degree decreased and the content of humus increased while water holdup of MSW decreased.The dry and wet gravimetric water holdup of the waste decreased with the increase of overburden pressure.When the overburden increased to a certain value,the trend of reduction was slowed down.In general,the volumetric water holdup decreased with the increase of overburden,but for the loose waste,it increased initially and then decreased with the increase of overburden after overburden reached a certain value.Both dry and wet gravimetric water holdup of the waste decreased with the increase of dry density.The method and apparatus of laboratory test of water holdup presented in this paper were reasonable and feasible.

关 键 词：填埋场 城市固体废弃物 持水率 干密度 

分 类 号：X705[环境科学与工程—环境工程]