摘要
对深基坑支护的一种新技术——预应力锚杆柔性支护法作了简单介绍。运用有限差分方法对其进行了分析研究,并与相同条件下的土钉支护进行了比较分析,计算表明预应力对基坑潜在滑移场的控制是非常有效的。基于改进的杆系有限元法,通过实际工程对预应力锚杆柔性支护技术进行了数值计算,得到了预应力值对基坑位移的影响曲线及锚杆轴力的分布规律,并与现场监测进行了比较,验证了程序计算的正确性。通过数值分析,体现了该技术在严格控制基坑变形、超深基坑支护方面具有明显的优越性。
A new retaining method for deep excavation-prestressed anchor flexible retaining method has been developed by the authors. This technique is studied by finite difference method; and the calculating results are compared with the soil-nailed support system. Critical slide zone of deep excavation is controlled by prestress values. Based on the modified bar system finite element method, the prestressed anchor flexible retaining system is calculated and analyzed through a practical engineering. The distribution rules of horizontal displacements and anchor axial force are calculated. By the numerical analysis, its advantages such as small displacements and application to super-deep excavations are investigated.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第21期3978-3982,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
岩土工程
预应力锚杆
柔性支护
深基坑
杆系有限元
数值分析
geotechnical engineering
prestressed anchor
flexible retaining
deep excavation
bar system finite element method
numerical analysis
