The hardness, functions and application scenarios of the foot bolts for tunnel support are as follows:
Hardness:
The hardness requirements of the foot bolts for tunnel support are usually higher to ensure that they can withstand various pressures and tensile forces in the tunnel. The exact hardness value may vary according to the material, grade and manufacturing standard of the bolt.
Common anchor bolt materials include carbon steel, alloy steel, etc. These materials have high strength and hardness, and can meet the needs of tunnel support.
Functions:
The main function of the tunnel support ground bolt is to connect the support structure with the tunnel surrounding rock closely to form a stable overall structure. They are embedded in the tunnel surrounding rock or concrete foundation to form a strong connection with the surrounding rock or foundation, so that they can effectively resist external forces such as pressure, tension and vibration in the tunnel. The anchor bolts can also transfer the weight and load of the supporting structure to the surrounding rock or foundation, so as to maintain the stability and safety of the tunnel structure.
Usage scenario:
Tunnel support ground bolt is widely used in various tunnel projects, including highway tunnel, railway tunnel, subway tunnel and so on. In the process of tunneling and supporting, anchor bolts are used to connect and fix various supporting structures, such as steel arches, shotcrete layers, etc. They can be used for tunnel vault, side wall and floor support, as well as tunnel inlet and outlet and other special parts of the reinforcement.
In addition, the anchor bolts can also be used for the installation and fixing of equipment in the tunnel to ensure the safe operation of the equipment.
In short, tunnel support ground bolts are one of the indispensable fasteners in tunnel engineering. They ensure the stability and safety of tunnel structure by providing stable connection and support.