摘要
目前,抗浮锚固技术已被广泛应用于工程建设中。然而,学界对扩大头抗浮锚杆与不同级配土体相互作用的力学机制的研究尚不充分。因此,文章针对扩大头抗浮锚杆与土体级配的相互作用展开了研究。首先通过Rosin-Rammler函数构建级配曲线,并以曲线形状参数m值表征土体颗粒的不均匀性,然后进行拉拔数值模拟。结果表明,在拉拔过程中,m值越大,土体颗粒越不均匀,并且拉拔承载力随着m值的增大而减小。同时,速度传递区域由类锥形转为类矩形分布,接触力链由粗支网状转为细支网状。
At present,anti-floating anchorage technology has been widely used in engineering construction.However,the research on the mechanical mechanism of the interaction between the enlarged head anti-floating anchor and different graded soils is not sufficient.Therefore,this paper studies the interaction between the enlarged head antifloating anchor and the soil gradation.Firstly,the grading curve is constructed by Rosin-Rammler function,and the curve shape parameter m value is used to characterize the non-uniformity of soil particles,and then the pull-out numerical simulation is carried out.The results show that during the pull-out process,the larger the m value is,the more uneven the soil particles are,and the pull-out bearing capacity decreases with the increase of m value.At the same time,the velocity transmission area changes from a cone-like to a rectangular-like distribution,and the contact force chain changes from a coarse-branched mesh to a fine-branched mesh.
作者
杨靖
YANG Jing(China Railway Construction Group Co.,Ltd.,Beijing 100040,China)
出处
《工程技术研究》
2024年第5期4-7,共4页
Engineering and Technological Research
