摘要
锚杆广泛应用于地质工程中,例如斜坡控制。工程中经常会出现空锚、断锚等锚固质量问题,所以必须对锚杆进行无损检测。近些年来,锚杆的锚固质量检测技术得到了快速发展。电磁法检测已得到广泛关注,其理论基础必须深入研究。本文就地下锚杆建立了物理模型,通过计算得到了锚杆周围的地下电流密度分布解析式,并计算出了地下电流在地面上产生的磁场,得出了地面上磁场仅由锚杆电流决定的结论。这一结果可以作为对电磁法检测锚杆进行深入研究的理论基础。
The rock bolts are applied widely in geological engineering, for example, landslide control. Incomplete consolation between bolt and rock happens frequently in engineering construction. It is necessary to test the holding state of rock bolts nondestructively for the project. There has been a rapid development in the nondestructive testing field of rock bolts in recent years. The test based on electromagnetic method is paid close attention to. the theoretical foundation of the testing. In the paper a model of the rock bolt in the ground is proposed and the electric current density of ground around it is derived. We calculate magnetic field on the ground from this electrical currentThe result can be used to study the nondestructive testing of rock bolts deeply.
出处
《工程地球物理学报》
2006年第2期108-110,共3页
Chinese Journal of Engineering Geophysics
关键词
锚杆
电流分布
电磁法
无损检测
rock bolt
distribution of electric current
electromagnetic method
nondestructive testing
