Supply Self Drilling Rock Anchor Bolt (also known as self-drilling anchor bolt) mainly includes the following aspects:
Suspension: The self-drilling bolt passes through the weak and loose rock and soil body, such as the underlying structure composed of pebbles, conglomerates, silt stone, etc., and generates tension after anchoring into the formation, bearing the self-weight and sliding force of the rock and soil body that is easy to slide, and preventing the sliding and collapse of the slope and tunnel wall.
Extrusion reinforcement: After the self-drilling bolt is driven into the rock and soil body, the compression zone (that is, the anchor solid) after the stress of the adjacent bolt overlaps each other to form a compression zone, which enhances the overall bearing capacity. This kind of action is more common in tunnel engineering, especially in the project where the self-drilling bolt is used as the support of the advance pipe shed, they support each other and jointly bear the weight of the rock and soil mass above.
Composite beam (arch) action: After the self-drilling bolt is inserted into the formation at a certain depth, the strata under the action of anchoring force squeeze each other, the interlayer friction resistance increases, and the internal stress and deflection decrease, which is equivalent to turning the simple superimposed beam (arch) into a composite beam (arch). The flexural stiffness and strength of the composite beam (arch) are improved, thus enhancing the bearing capacity of the anchor solid.
Self-drilling rock anchors can be used in a wide range of scenarios, including but not limited to:
Foundation and foundation engineering field: mainly used for foundation pit/deep foundation pit support, pile foundation support, foundation repair, retaining wall reinforcement, etc., self-drilling anchor anchor solid can also be used as micro pile, anti-floating anchor, etc.
Tunnel and underground engineering field: mainly used for tunnel pipe shed support, system support, lock foot support, radial support, roof support, etc., can also be used for underground parking lot support.
Slope engineering field: mainly used for slope/high slope support, embankment protection, etc.
In addition, self-drilling rock anchors can also be used for foundation reinforcement, reinforcement of old buildings, pile foundation of wind power tower, coastal protection, retaining wall foundation and other different scenarios. In the construction process, it is necessary to strictly follow the construction technology of self-drilling bolt, otherwise it will affect the anchoring effect of the project and leave hidden dangers to the future project safety.
In general, self-drilling rock anchors are widely used in various geotechnical engineering support construction because of their unique advantages (such as simple construction and good anchoring effect, etc.).