作　　者： ; ; ;

机构地区： 长安大学公路学院特殊地区公路工程教育部重点实验室

出　　处： 《长安大学学报（自然科学版）》 2004年第4期36-39,共4页

摘　　要： 分析了大直径空心桩的施工特点,利用MARC软件,对大直径空心桩这一新型基础进行了数值仿真。计算模型中将土体视为弹塑性体,桩注浆体土体间接触关系为库仑摩擦。分析表明大直径空心桩表现了端承摩擦桩的性状,其端承力在承载力的发挥中占了很大比重,桩侧压浆混凝土相当于增大了1/2压浆混凝土厚度的有效桩径,并对空心桩与实心桩的承载性能进行了对比。通过与实测结果比较,证明模型合理。 Construction technique of large diameter hollow pile was analyzed. Through the MARC program, large diameter hollow pile was analyzed with simulation method. In the model, the soil was assumed to be elastic-plastic material; contact interfaces among pile, injected cement and soil were submitted to Coulomb-Friction-Law. It was shown that the pile performs end resistance and skin friction behavior, the end resistance occupies a significant proportion in bearing capacity, the contribution of injected cement equals to half thickness concrete. The performance comparison of hollow pile with solid pile was carrier out. The simulation results agree with the actual test data, which proves the model to be appropriate.

关 键 词： 桥梁工程 大直径空心桩 数值仿真 本构模型 承载性状

领　　域： [建筑科学] [交通运输工程]