Stress Distribution in Fixed Anchor Length of Compression Type Anchor in Soft Rock Mass
LU Li,ZHANG Yong-xing,ZHANG Si-ping and WU Shu-guang
DOI:10.11835/j.issn.1674-4764.2011.05.012
Received ,Revised , Accepted , Available online July 01, 2015
Volume ,2011,Pages 69-74
- Abstract
To study stress distribution in fixed anchor length of compression type rock anchor cable, field test was carried out. Strain sensors were placed in the grout paste in fixed anchor length with certain interval. Axial and radial strains of the grout were noted by test. Shear stress distribution curve along the fixed anchor length was obtained by stress-strain relationship and static equilibrium analysis. Analysis results prove that maximal shear stress on the interface can achieve upper level and move forward when the load increases; the transmission length is short; shear stress transfers forward; and three dimensional state is obvious around capacity plates in soft rock mass.