RT模式下有限土体主动土压力公式推导  

Derivation of active earth pressure formula of finite soil mass under the RT mode

作　　者：万鹏 姚嘉楠 江胜学[1] 丁健[1] 徐长节[2,3] 钟旭[2] 王艳萍 WAN Peng;YAO Jia-nan;JIANG Sheng-xue;DING Jian;XU Chang-jie;ZHONG Xu;WANG Yan-ping(China Railway SIYUAN Survey and Design Group Co.,Ltd.,Wuhan 430063,China;Research Center of Coastal and Urban Geotechnical Engineering,Zhejiang University,Hangzhou 310058,China;Key Laboratory of Infrastructure Safety Control in Geotechnical Engineering of Jiangxi Province,Engineering Research and Development Centre for Underground Technology of Jiangxi Province,East China Jiaotong University,Nanchang 330013,China;Zhejiang Infrastructure Construction Group Co.,Ltd.,Hangzhou 310012,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063 [2]浙江大学滨海和城市岩土工程研究中心,杭州310058 [3]华东交通大学江西省岩土工程基础设施安全与控制重点实验室,江西省地下空间技术开发工程研究中心,南昌330013 [4]浙江省建投交通基础建设集团有限公司,杭州310012

出　　处：《兰州大学学报(自然科学版)》2025年第1期91-98,共8页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金项目(52238009);国家自然科学基金委员会-中国国家铁路集团有限公司高速铁路基础研究联合基金项目(U1934208);江西省自然科学基金项目(20223BBG71018)。

摘　　要：通过离散元方法模拟对水平微分单元法及其基本假设进行验证,论证了水平微分单元法用于绕墙顶旋转(RT)模式下有限土体主动土压力研究的合理性.基于离散元模拟结果,针对Ⅰ、Ⅱ区土体分别采用不同的圆弧形小主应力轨迹线考虑土拱效应,假设土体滑裂线为二次抛物线,通过改进水平微分单元法,依据静力平衡条件推导出RT模式下有限土体主动土压力的计算公式.通过与离散元方法模拟结果及其他已有模型试验结果的对比,验证了该公式的合理性及有效性.The horizontal differential element(HDE)method and its basic assumptions were verified by discrete/distinct element method and discrete element simulation,and the rationality of HDE method for the study of active earth pressure in finite soil under the rotating about top(RT)mode was demonstrated.Based on the discrete element simulation results,different arc shaped small principal stress trajectory lines were used to consider the soil arching effect for the soil in zoneⅠandⅡ,and the soil sliding line was assumed to be a quadratic parabola.By improving HDE method and in consideration of the static equilibrium conditions,the calculation formula of the active earth pressure of finite soil mass under RT mode was derived.The rationality and validity of the calculation formula were verified by comparing the discrete/distinct element method discrete element simulation results with the existing model test results of other scholars.

关 键 词：绕墙顶旋转模式 主动土压力 有限土体 水平微分单元法 土拱效应 

分 类 号：TB115[理学—数学]