地下沼气池池壁土压力取值方法及池盖受力分析  

Earth pressure on pool wall and stress analysis on pool cover of underground biogas digester

作　　者：宫婉婷[1] 丁敏[1] 徐庆磊[1] 蒋秀根[1] 

机构地区：[1]中国农业大学水利与土木工程学院,北京100083

出　　处：《农业工程学报》2011年第4期270-276,I0007,I0008,共9页Transactions of the Chinese Society of Agricultural Engineering

基　　金：教育部中央高校基本科研业务费专项资金项目(2009-3-11);科技部"十一五"国家科技支撑计划项目(2008BADC4B03);新世纪优秀人才计划(NCET-08-0542);国家自然科学基金资助项目(50979108);中国农业大学URP项目

摘　　要：为保证地下沼气池结构的安全性,采用Rankine土压力理论比较了3种常见土质的静止、主动和被动土压力,并确定了地下钢筋混凝土圆形沼气池池壁土压力取值方法;根据线弹性有限元分析方法,研究了平板、球壳和圆锥台3种不同形状的沼气池池盖受力性能。结果表明:地下沼气池池壁土压力宜取其静止土压力计算;环梁的设置可以使中部开圆形洞口的圆锥台形池盖的最大应力减小约40%,宜为其设置环梁。In order to ensure the security of underground biogas digester structure, the static, active and passive earth pressure of three kinds of soil were compared based on Rankine earth pressure theory, and earth pressure value on pool wall of underground biogas digester was determined. According to linear elastic finite-element analysis, the mechanical behavior of three different pool covers, such as slab, shell and truncated cone, were analyzed. The results showed that the earth pressure on pool wall could be considered as static earth pressure, and ring beam can make the maximum stress of truncated cone pool cover with circular opening decrease by 40%. It is necessary to set ring beam with it.

关 键 词：沼气 设备 受力测量 池壁 土压力 池盖 

分 类 号：S216.4[农业科学—农业机械化工程]