Reinforcement cage construction technology for solving problem of cavern

The invention relates to a reinforcement cage construction process for solving a rock cave, and belongs to the technical field of karst area construction. Comprising the following steps that S1, a reinforcement cage and a pre-stressed anchor cable are manufactured; s2, the surface of the outer side wall of the reinforcement cage is wrapped with an inner pile casing, the surface of the outer side wall of the inner pile casing is wrapped with a telescopic layer, and a sealing cavity is formed between the telescopic layer and the inner pile casing; s3, drilling is conducted; s4, detection is conducted, specifically, the position of a karst cave in the formed hole is detected, and a pressure sensor is correspondingly embedded; s5, placing the pile; s6, grouting is conducted; s7, pressurization is conducted, the telescopic layer expands outwards under extrusion of the grout, and therefore corresponding arc-shaped protrusions for blocking the karst cave are formed; s8, when the detection result of the pressure sens