采用极限分析方法确定土层锚杆的极限承载力

考虑到土层锚杆的拉拔破坏方式以锚杆体周围的土体的屈服或破坏为主 ,根据现场拉拔试验及数值计算成果 ,本文假定在极限状态下锚杆体破坏时在土体中形成一个锥体或纺锤形的破坏体 ,以极限分析理论为基础 ,确定了锚杆极限承载能力的计算方法。通过与常规的设计理论进行对比分析 ,本文确定的计算方法从另一方面描述了土层锚杆的破坏方式 ,而且这种破坏方式在工程实践中更常见

Determination of Limit Bearing Capacity of Soil Anchor Rods by Method of Limit Analysis

The yield or failure of soil around anchor rods is the main failure forms of the rods. It is assumed that an awl or spindle-shape body is formed under the limit state. Based on the theory of limit analysis the method to determine the limit bearing capacity of anchor rods is given. Comparing with the common design theory the calculating method presented by the authors describes the failure form of soil anchor rods, and the said failure is more common in engineering practice.