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中文摘要：
为了获得不同填埋龄期垃圾的压缩指数,取用苏州市七子山填埋场的5个钻孔中不同深度处的垃圾原状样,选用其中31个代表不同填埋龄期的垃圾样,采用自制的力学压缩仪,测试了垃圾的主压缩指数,研究了垃圾的填埋龄期、组分和初始孔隙比等对压缩指数的影响.测试结果表明,经生物降解后,垃圾中可压缩组分（如有机质、塑料、纸类、木材和织物）质量分数随填埋龄期增加而降低;由于上覆压力作用,垃圾的初始孔隙比随填埋深度增加而降低;随着填埋深度增加,垃圾的主压缩指数从1.0降低到0.3,修正主压缩指数从0.3降低到0.1.修正主压缩指数随填埋龄期呈线性关系递减,该线性关系与初始孔隙比所处范围有关.所得到的垃圾压缩指数为垃圾堆体分层沉降计算提供了参数依据.
英文摘要：
Changes in mechanical compressibility of municipal solid wastes （MSW） as a function of fill age and embedding depth were reported. Bulk samples representative of different fill ages were obtained from five boreholes drilled down to the bottom of the Qizishan landfill in Suzhou of China. Thirty-one bulk samples were used to perform confined compression tests for the measurement of primary compression index. Waste composition, unit weight and void ratio of the thirty-one samples were also measured. The test results showed that the content of compressible components （i. e. , organics, plastics, paper, wood and textiles） decreased with an increase in the fill age of MSW due to biological degradation. The initial void ratio decreased with the embedding depth of MSW due to an increase in overburden pressure. With an increase in the embedding depth of MSW, the primary compression index decreased from 1.0 to 0.3, and the modified primary compression index decreased from 0.3 to 0.1. The modified primary compression index decreases linearly with increasing fill age of MSW, and the linear relationship still depends on the range of initial void ratio. The data of primary compression index provides a more complete database for landfills settlement prediction.
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