文献类型：期刊文献

中文题名：非对称荷载作用对深基坑支护体系影响的数值模拟研究

英文题名：Numerical Simulation Study of the Effect of Asymmetric Load on the Supporting System of Deep Foundation Pit

作者：罗战友[1,2,3,4];葛政[1,2];黄曼[1,2]

机构：[1]绍兴文理学院土木工程学院,浙江绍兴312000;[2]浙江省岩石力学与地质灾害重点实验室,浙江绍兴312000;[3]宁波大学土木与环境工程学院,浙江宁波315211;[4]浙江科技学院土木与建筑工程学院,浙江杭州310023

年份：2023

卷号：43

期号：10

起止页码：58

中文期刊名：绍兴文理学院学报

外文期刊名：Journal of Shaoxing University

收录：国家哲学社会科学学术期刊数据库

语种：中文

中文关键词：非对称荷载;深基坑;数值模拟;曲线拟合

外文关键词：asymmetric load;deep foundation pit;numerical simulation;curve fitting

中文摘要：基坑施工的过程中往往存在非对称荷载,非对称荷载的作用在设计阶段常被按照对称荷载计算,对基坑施工存在着重大的安全隐患,以均布荷载模拟基坑周围的非对称荷载,建立非对称荷载作用下基坑开挖的数值计算模型,讨论在非对称荷载时,超载对基坑支护体系的影响.结果表明:当基坑受到非对称荷载时,荷载较大侧的地连墙最大弯矩、支撑轴力等均比荷载较小侧更大,且两侧围护结构内力的差异随着荷载差值的增大而增加;随着超载的增大、超载与基坑边缘距离的减小,围护结构内力呈非线性增大,提出超载影响系数的概念并推导其计算公式,量化了非对称荷载对基坑围护结构内力的影响,以提高非对称荷载下基坑支护体系设计的安全性,为基坑设计和施工提供参考.

外文摘要：There always emerge asymmetric loads in the construction process of foundation pits.The action of asymmetric load is often calculated according to the symmetric load in the design stage,hence a great hidden danger to the foundation pit construction.In this paper,the uniform load was used to simulate the asymmetric load around the foundation pit,the numerical calculation model of the foundation pit excavation under the asymmetric load was established,and the influence of the overload on the foundation pit supporting system was discussed.The results show that under the action of asymmetric load,the maximum bending moment of the ground connecting wall on the overload side and the axial force of the support have greatly increased,and the internal force of the supporting structure increases with the increase of the overload and the decrease of the working distance.The paper ultimately puts forward the concept of overload influence coefficient and derives its calculation formula,and quantifies the impact of asymmetric loads on the internal force of the foundation pit enclosure structure,in order to improve the safety of the foundation pit support system design under asymmetric loads.It is hoped that the research will provide some reference for the design and construction of foundation pits.