摘要
为了研究螺旋锚基础在软黏土地区上拔基础作用力以及施工工况下的受力性能,采用不同的锚盘直径、埋置深度和锚盘数量,并设置6个分析工况,计算其上拔承载能力并分析锚盘和锚杆的贡献率;建立螺旋锚土体的精细化有限元模型,对螺旋锚基础进行施工况下的力学性能研究。研究结果表明,螺旋锚上拔承力随着锚盘直径、基础埋深增大以及锚盘数量增多而增加;当锚顶位移小于65mm时,上拔荷载与锚顶位移呈线性关系,锚盘和锚杆应力均小于其屈服强度;在施工工况下,螺旋锚应力水平明显高于上拔工况,对螺旋锚基础进行设计时,需重视施工工况验算。文中研究内容可为螺旋锚基础设计提供参考。
To study the uplifting force of the spiral anchor foundation in the soft clay area and the mechanical performance under construction conditions,6 analysis conditions associated with different anchor disc diameters,embedding depths,and number of anchor discs were calculated to obtain the pull up the load-bearing capacity and analyze the contribution rate of the anchor plate and the anchor rod.Furthermore,the refined finite element model of the spiral anchor soil was established to study the mechanical performance of the spiral anchor foundation under construction conditions.The results show that with the increase of the diameter of the anchor plate,the depth of the foundation and the increase of the number of anchor plates.When the anchor top displacement is less than 65mm,the uplift load has a linear relationship with the displacement of the anchor item,and the stresses of the anchor plate and the anchor rod are both less than their yield strength.Under construction conditions,the stress level of spiral anchors is significantly higher than that of uplift conditions.When designing spiral anchor foundations,it is necessary to pay attention to the calculation of construction conditions.This study can be a reference for the design of spiral anchor foundation.
作者
吴立晴
邵国栋
盛寒柯
王文明
WU Liqing;SHAO Guodong;SHENG Hanke;WANG Wenming(Power China SEPC01 Electric Power Construction Co.,Ltd.,Jinan 250102,China;School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China)
出处
《低温建筑技术》
2021年第10期120-124,共5页
Low Temperature Architecture Technology
关键词
螺旋锚基础
上拔承载力
承载力计算
数值模拟
spiral anchor foundation
uplift capacity
carrying capacity calculation
numerical simulation
