What is the difference between soil nails and anchor rods？

Soil nails are passively stressed, i.e., soil nails are stressed only after a certain amount of deformation of the soil body has occurred, thus preventing further deformation of the soil body

Anchor is active force, that is, through the anchor time prestressing, before the foundation pit is not excavated to limit the soil body to occur excessive deformation soil nails is passive force, that is, after a certain amount of deformation of the soil body, soil nails are stressed, thus preventing the soil body from continuing to deform

The force range soil nail is full-length force, but the direction of force is divided into two parts, the potential slip surface divides the soil nail into two parts, the first half of the force direction points to the direction of the potential slip surface, the second half of the force direction back to the direction of the potential slip surface

Anchor rods, on the other hand, have a free end in the first half and a stressed section in the second half, so sometimes the mortar is not filled in the first half of the anchor rod

Soil nailing is a soil reinforcement technology that uses densely arranged reinforcement as a means of soil reinforcement to improve the strength and self-stabilizing capacity of the reinforced soil.

Anchoring is an anchoring technique in which the load from the surface unstable geotechnical body is transferred to the deep stable position of the geotechnical body by means of tension rods to achieve the stabilization of the reinforced geotechnical body.