1. The steel mine supports the foundation pit to be excavated vertically and in layers, and follows the principle of first support and then excavation. The support installation is closely combined with earthwork construction. In the section where the earthwork is excavated to the design elevation, timely installation and prestress are applied. Make it play a supporting role in time;
3. The steel pipe supported by the mine is symmetrical to ensure that the two ends are synchronized and orthogonal to the steel enclosure. The diagonal brace must ensure that the angle of the shear block is the same as the angle of the diagonal brace. The steel pipe transverse brace should be prestressed in time after installation
4. Steel mine supports combined jacks are pre-energized to achieve symmetrical synchronization and hierarchical loading. To ensure symmetrical loading, external T-shaped valves can be connected to the combined jacks through the same hydraulic pump station
5. All support connections of the mine support are tightly and tightly attached. The direct pressure-bearing steel plate should be milled and tightened when bolted to prevent eccentric pressure on the steel pipe support. A special person inspects the steel pipe support wedges. If there is any looseness, reload the wedges in time.
6. The steel mine support and steel enclosure of the mine support are steel components, and the quality of the weld must be ensured. The steel enclosure and support head at the diagonal support of the end are strictly welded and installed according to the design size and angle to ensure that the support is subjected to the axial force.
