Exploration of precise installation techniques for foot-locking anchor pipes in loess tunnels
By introducing the concept of a foot-locking anchor pipe angle controller,we achieved precise installation of foot-locking anchor pipes in loess tunnels.This paper discusses the key implementation points of the design and installation processes of foot-locking anchor pipes through engineering examples.The precision in controlling the drilling angle of the wind tunnel rock drill has significantly improved,reducing the maximum settlement at section monitoring points from 24.3 mm/d to-0.9 mm/d.Precise construction angles facilitate the transfer of earth pressure at the arch foot position to the surrounding rock,enhancing the bearing capacity at the arch foot position.Additionally,in loess tunnels,this precision effectively controls the deformation of the surrounding rock,improving the stability of the tunnel's surrounding rock.
foot-locking anchor pipedirectional controlU-shaped reinforcementmonitoring and measurement
NETL
NSTL
万方数据
