摘要
根据某桥墩基础承载力下降的具体情况,采用单孔复合锚杆桩技术,对桥墩基础进行了加固,并对单孔复合锚杆桩的加固机理进行了初步研究.利用数值模拟方法,对加固后桥墩基础的承载能力以及加固结构的承载性能进行了比较系统地分析.结果表明:利用单孔复合锚杆桩技术加固后的桥墩基础,其承载力有较大幅度地提高,在600kN/m的桥墩载荷作用下,加固结构和周围的岩体在垂直方向上的位移变形值不足2mm,而且基本上保持着同步变形同步稳定的理想状态,达到了设计目的.
According to the in-situ information about the load-carrying capacity descent of pier rock mass foundation, the multiply anchor-pile technique in a single bore was adopted in the reinforcement. The mechanism of the technique was analyzed in the rudimental stage. By using of numerical simulation, the load-carrying capacity of pier foundation and anchor-piles were also calculated after reinforcement. The result shows that, after reinforcement the load-carrying capacity of pier rock mass foundation was increased largely. Under the loading of 600 kN/m from the pier, the maximum value of vertical displacement of anchor-piles and rock mass was less than 2 mm, and that it is keeping synchronous in the displacing process.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2003年第5期398-401,共4页
Journal of University of Science and Technology Beijing
基金
山东省科委科技攻关项目(No.321008)
