As an efficient placing approach, self drilling rock bolt palys a significant role in supporting rock mass to prevent deformation and excavation,buildings,roadway,bridges,large equipment are all established on the rock, so the stabilization of rock layer will be extremely important. Self drilling rock bolt system is widely used in foundation reinforcement projects, such as railway, tunnel, mining, hydropower station, dam, bridge base, water bank, high building foundation etc., also widely applied in solving geological disaster, such as foundation subsidence, hole collapse, break, collapse, and landslip etc.
And Sinorock's rock bolt system can applied in various conditions:
1 Hard rock
Surrounding rock strength than the big, tunnel surrounding rock without plasticization, don't need internal pressure effect.At the same time, the strength of the hard rock of the rock itself is good, the stability of the tunnel is usually controlled by discontinuity on the fracture mechanics, therefore, to maintain and control the rock anchor block, make the surrounding rock, mainly inhibitory and the relative displacement of the fracture surface parallel or orthogonal direction so as to facilitate the formation of balance arch.
2 Soft rock
In the surrounding rock strength than the soft rock tunnel surrounding rock in plasticizing, need to pressure balance effect and formed within the arch effect is given priority to, mainly control the radial displacement of tunnel wall and internal relative displacement of surrounding rock.Surrounding rock using elastic-plastic body completely assume parsing, because of the existence of internal pressure and reduce the plastic area and the surface displacement.But if you want to make the plastic zone does not occur, then at the beginning of the excavation takes a lot of supporting capacity.So we must with other means of support, such as shotcrete.
3 Sand soil surrounding rock
In small depth of sand soil surrounding rock, shotcrete is effective, according to the measurement results of the past, vault near the anchor is almost not affected by strain and stress of only.On this occasion, therefore, the use of bolt, main is to prevent the collapse of the constraints and enhance the arch foot near to give priority to.