Performance of tunnel retractable protective support and price of tunnel retractable protective support

Description :

　　The collapsible protective bracket for tunnels has the advantages of high initial support force, strong support strength, easy installation, and low deformation. Therefore, it is commonly used to manufacture collapsible metal brackets for mine tunnels, secondary support for mine tunnels, and support for mountain tunnels. The use of U-shaped tunnel retractable protective brackets effectively reduces the occurrence of accidents such as roof collapse and lining, ensuring safety and reliability, and improving the stability of the mine ventilation system. The use of U-shaped steel retractable supports has effectively solved the problem of excavation support.

　　Product composition of tunnel retractable protective support

　　1. Top beam.

　　The top beam is a curved arch shape, and its number varies depending on the size of the tunnel section, the stress on the support, and the transportation conditions, with one or multiple sections.

　　2. Column legs.

　　There are three forms of column legs, one is that the upper part is arc-shaped and the lower part is a straight segment; The second type is entirely curved and has only one curvature radius; The third type is entirely curved, but with two curvature radii. There is a base welded under the column legs, and the size of the base depends on the softness and hardness of the bottom plate;

　　3. Connectors.

　　The connector is a clamping device between the bracket sections, which can serve as a connection between the sections. It can also compress the joint parts of the two sections of steel to provide pre tightening force, so that there is friction between the U-shaped steel, thereby ensuring that the arch bracket has a certain working resistance and a certain amount of shrinkage.

　　4. Inter rack pull rod.

　　The function of the inter bracket tie rod is to enhance the overall relative stability of the bracket, connect the bracket longitudinally, and form a whole.

　　5. backing material.

　　The backing material is the filling material between the tunnel retractable protective support and the surrounding rock, aiming to make the tunnel retractable protective support in close contact with the surrounding rock, improve the stress condition of the support, enhance its bearing capacity, and maintain the stability of the surrounding rock.

　　Characteristics of tunnel retractable protective support products

　　1. The retractable protective bracket of the roadway can withstand high pressure, support for a long time, and has the characteristics of easy installation and not easy deformation.

　　2. The retractable protective support of the roadway has the ability to shrink and has stable and reliable bearing capacity compared to other rigid supports, adapting to the load and deformation of soft surrounding rock.

　　3. The cross-section utilization rate of the tunnel retractable protective support is high, the support is easy to support, and the maintenance amount is small.

　　4. The recycling and reuse rate of retractable protective brackets in tunnels is high, reducing the use of pit logs

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AfterSalesService :

• Shrinkable protective bracket for roadway