局部竖向受荷条件下泡沫轻质土极限承载力研究  

Ultimate bearing capacity of foam lightweight soil under local vertical loading conditions

作　　者：李相厚 王珺[2] 黄雷 邓建营 葛玉宁 朱恒 王明法 LI Xianghou;WANG Jun;HUANG Lei;DENG Jianying;GE Yuning;ZHU Heng;WANG Mingfa(Shandong Luqiao Group Co.Ltd.,Ji'nan 250061,China;Shandong University,Ji'nan 250100,China;Shandong East Highway Bridge Construction Co.Ltd.,Linyi 276000,China;Shandong High-speed Infrastructure Construction Co.Ltd.,Ji'nan 250002,China)

机构地区：[1]山东省路桥集团有限公司,山东济南250061 [2]山东大学,山东济南250100 [3]山东东方路桥建设有限公司,山东临沂276000 [4]山东高速基础设施建设有限公司,山东济南250002

出　　处：《新型建筑材料》2024年第3期150-154,158,共6页New Building Materials

基　　金：山东省重点研发计划项目(2019GSF109045)。

摘　　要：为了揭示泡沫轻质土的承载特性及破坏特征,开展了局部加载条件下泡沫轻质土承载试验,考虑泡沫轻质土湿密度、龄期、加载位置等参数变化,测试得到了泡沫轻质土荷载-位移曲线和破坏模式。结果表明,在受竖向局部荷载作用时,泡沫轻质土呈现类似地基的“弯沉盆”式变形规律。当加载点位置不同时,试件的承载能力及破坏模式都有较大的变化,呈现出局部剪切破坏或直剪破坏。基于试验结果,在Terzaghi地基承载力理论公式的基础上,构建了泡沫轻质土极限承载力计算公式。In order to reveal the load-bearing characteristics and damage features of foam lightweight soil,this paper carried out the load-bearing test of foam lightweight soil under local loading conditions.The load-displacement curve and damage mode of foam lightweight soil are obtained from the test considering the changes of parameters such as wet density,age and loading position of foam lightweight soil.The results show that when subjected to vertical local load,the foam lightweight soil showed a"bending and sinking basin"type deformation law similar to that of foundations.When the location of the loading point is different,the bearing capacity and damage mode of the specimen will change significantly,showing local shear damage or straight shear damage.Based on the analysis of the test results,this paper constructed a formula for calculating the ultimate bearing capacity of foam lightweight soil based on the theoretical formula of Terzaghi foundation bearing capacity.

关 键 词：泡沫轻质土 承载特性 局部加载 破坏模式 极限承载力 

分 类 号：TU449[建筑科学—岩土工程]