Trapezoidal and arched rigid supports are suitable for roadways with relatively stable surrounding rock, small deformation and low pressure, otherwise, the support will be severely deformed and damaged, the roadway section will be sharply reduced, and even it will be renovated many times and even difficult to use. Rigid support means that the support has large rigidity and small displacement, and the pipeline slides or rolls on the support column or beam through the pipe rack.
The adaptability of tenon structure of various original trapezoidal rigid metal supports is analyzed. On this basis, the trapezoidal and arch structures of the support are improved. Practice has proved that the improved new metal support can bear large lateral pressure and lateral thrust of surrounding rock, reduce the maintenance amount of supporting roadway in the later period, improve the safety factor of roadway and ensure the safe production of mine.
Specification for installation of rigid supports
1, when the traditional wall-connected parts are installed, holes need to be reserved in the shear wall due to structural needs, and each wall-connected part has two holes, which will destroy the solid steel structure and affect the visual quality of the entity. However, there is no need to leave holes when using pin-type rigid wall parts, which can ensure the physical visual quality and structural quality of concrete.
2. When the traditional wall-connected part is erected, the structure is relatively complex and the material consumption is relatively high, which increases the material consumption to some extent, indirectly increases the labor cost and affects the project cost. However, using steel bars as embedded parts and embedding them when pouring concrete makes the structure safe and reliable, which can reduce related costs and risk factors and make the structure more concise.
3. In the erection process of traditional wall-connected parts, the structure is relatively complex, which leads to many working procedures and great difficulty in erection, which reduces the safety factor of scaffolder's operation. The use of plug-in rigid wall fittings will reduce the operation procedures, reduce the difficulty of operation and increase the safety factor of operators.