分层堆填条件下填埋场沉降计算及实例分析  

Settlement calculation of landfills under layerwise summation and case study

作　　者：柯瀚[1,2] 王耀商[1,2] 陈云敏[1,2] 詹良通[1,2] 徐晓兵[1,2] 

机构地区：[1]浙江大学岩土工程研究所,浙江杭州310058 [2]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

出　　处：《岩土工程学报》2011年第7期1029-1035,共7页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学重点基金项目(50538080);国家自然科学基金项目(50978229)

摘　　要：分别采用Sowers模型、Marques模型及应力降解模型编制了填埋场容量及沉降计算程序,模拟分析了分层堆填条件下填埋场的堆填及沉降过程。根据上海老港封顶系统的部分实测沉降数据拟合了这3种沉降计算模型的参数。通过比较发现Sowers模型计算参数简单但模拟结果较为粗略,Marques模型和应力降解模型结果相近,相对而言应力降解模型参数少并容易确定。采用应力降解模型及相应的拟合参数计算了老港填埋场剖面的顶部整体沉降并和实测数据以及中间层沉降计算数据进行了对比分析。除了一些受施工影响较大的区域,该模型及沉降计算方法能较好地模拟填埋场的顶部的沉降过程。计算表明填埋场沉降和不均匀沉降的最大值均可能出现在堆体内部而不是堆体表面,因此必要时堆体内部构筑物设计时应进行沉降和不均匀沉降验算。The placement and settlement processes of a landfill under layerwise summation are simulated by means of the Sowers model,Marques model and stress degradation model.The relevant computer software for predicting the settlement and capacity of the landfill is developed based on the calculation method.The parameters for the above three models are fitted based on part of the measured data in Shanghai Laogang Landfill.A comparison indicates that it is simple to fit parameters but the results are rough by using the Sowers model.The results by means of the Marques model and stress degradation model are similar,but the parameters for the stress degradation model are relatively less and easier to be identified than those for the marques model.The post-construction settlement of Laogang Landfill is calculated by using the stress degradation model and compared to the measured data.It is shown that this model and calculation method can be employed to simulate the placement and settlement processes of Landfills well.The maximum settlement and differential settlement likely occur in the internal part instead of on the surface.Therefore settlements should be calculated before the design of internal structures.

关 键 词：填埋场 计算模型 沉降 压缩 蠕变 降解 

分 类 号：TU433[建筑科学—岩土工程]