Support grouting small pipe punching machine, precise slope support small pipe punching machine

Description :

　　Support grouting small pipe punching machine, precise slope support small pipe punching machine

　　Punching machines have been widely used in tunnel construction. The punching machine can set 200 holes on one pipe, and the machine is matched with a servo motor. The hole spacing error is within ± 0.3mm, and the punching speed is fast, which greatly improves the manual cutting speed compared to before. The circular holes are also relatively neat and beautiful.

　　The general parameters for small pipe grouting support are as follows:

　　The diameter of the steel pipe is 30-50mm, and the length of the steel pipe is 3-5m. The spacing between the grouting holes drilled on the steel pipe is 100-150mm. The spacing between the steel pipes arranged along the arch in the circumferential direction is 300-500mm. The insertion angle of the steel pipe along the arch is 5-15 °. The small conduit is a load-bearing member, so there should be a certain overlap length between the two rows of small conduits in the longitudinal direction. The overlap length of the steel pipe along the longitudinal direction of the tunnel is generally not less than 1m. Grouting material: cement mortar (water cement ratio 0.5-1) is generally used; When the surrounding rock is broken and the grouting effect of the rock mass is not good, a cement water glass double liquid slurry support grouting small pipe punching machine can be used for precise slope support small pipe punching machine.

　　The principle of advanced grouting consolidation for small conduits can be summarized into the following two types:

　　Infiltration grouting, for surrounding rocks with certain pores or cracks that are disturbed or damaged, under the action of grouting pressure, the slurry overcomes various flow resistance and infiltrates into the pores or cracks of the surrounding rock, achieving the purpose of geological reinforcement.

　　Secondly, splitting and compaction grouting. For dense soil formations, under high grout pressure, cracks are squeezed open, allowing grout to infiltrate and form vein like cement grout veins. The grout is distributed in the surrounding rock to form tree branches with steel pipes as the main trunk. After solidification, the grout clamps and covers the compacted soil, playing a consolidating role.

　　The above principles have been summarized through years of practical experience in tunnel engineering, and are the most feasible tunnel advanced grouting technology support grouting small pipe punching machine precision constant slope support small pipe punching machine.

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• Support grouting small pipe punching machine