作　　者： ; ; ; ; ;

机构地区： 华南理工大学建筑学院

出　　处： 《地下空间与工程学报》 2008年第2期285-289,共5页

摘　　要： 以相似指标为指导,通过涵洞、填土材料全过程相似的模型试验和数值模拟,研究高填土涵洞的土压力分布。通过逐层填土、分级加载完成四组试验工况下相似材料模型试验。同时采用模型试验参数进行有限元数值模拟分析。两种方法互相印证,得出涵洞顶部、侧面的土压力分布是由卸荷拱效应和沉降差产生的附加应力共同起作用决定的。同时分析了填土材料、地基条件对土压力分布的影响。对正确计算高填土涵洞土压力具有参考意义。 Guided by similar index, a model test and numerical simulation with culvert and fill material was fulfilled to study the earth pressure distribution of high filled culvert. Under four experiment behaviors, the similar material model test is completed through earth filling by layers and loading by grades. The model experiment parametere were adopted, for finite element numerical simulation analysis in the meantime. The two methods verified each other and the result shows that earth pressure distribution on top and side position is decided by soil arching effect and additional stress caused by differential soil settlement together. The paper analyzed the effects of different filling material and foundation conditions on soil pressure distribution. The results are valuable to correct calculation of high filled culvert＇s soil pressure.

关 键 词： 土压力 相似指标 高填土涵洞 模型试验 数值模拟

领　　域： [航空宇航科学与技术] [航空宇航科学技术] [建筑科学] [交通运输工程]