Pressure-controlled tunnel directional grouting-based reinforcement devices

A pressure-controlled tunnel directional grouting reinforcement device, applied in a grouting jumbo, comprising an interface pipe, wherein an actuated sleeve valve is provided at a center of an interior of the interface pipe, coordinated blade sets and fixed flow vanes are provided in an inner wall of the interface pipe, respectively;

• an end of the actuated sleeve valve away from the coordinated blade sets extends to an outside of the interface pipe, a plurality of return claw pipes are mounted on the end of the actuated sleeve valve away from the coordinated blade sets, both an interior of the actuated sleeve valve and an interior of each of the plurality of return claw pipes are in a hollow state, both ends of the actuated sleeve valve and each of the plurality of return claw pipes are configured with open ports, an intermediate portion of the actuated sleeve valve, located between the coordinated blade sets and the fixed flow vanes, is mounted with a front conical block and a rear conical block respectively, a coordinated rubber ring segment corresponding to the actuated sleeve valve is mounted between the front conical block and the rear conical block, an outer position of the actuated sleeve valve corresponding to the coordinated rubber ring segment is configured as a grout discharge chamber, a grout drainage trough is arranged on an outer wall of the actuated sleeve valve corresponding to the grout discharge chamber;
• and
• the front conical block and the rear conical block are sequentially arranged along a direction from the coordinated blade sets to the plurality of return claw pipes, both the front conical block and the rear conical block are slidably and fixedly connected to the actuated sleeve valve, a connecting spring is arranged on an outer position of the actuated sleeve valve between the rear conical block and the fixed flow vanes, a radial dimension of the front conical block and a radial dimension of the rear conical block are smaller than an inner diameter of the interface pipe, each of the plurality of return claw pipes bent in a reverse direction toward the interface pipe, a compressed rubber cap is mounted on a position of the actuated sleeve valve that is between the fixed flow vanes and the plurality of return claw pipes, a cross-section of the compressed rubber cap is curved in an arch shape, and the compressed rubber cap is curved toward the plurality of return claw pipes.