Sleeve valve pipe grouting structure and grouting replacement method thereof

The invention relates to the technical field of underground engineering and hydraulic engineering, and discloses a sleeve valve pipe grouting structure which comprises a sleeve valve pipe and a grouting pipe, the grouting pipe is located in the sleeve valve pipe, the head of the grouting pipe is provided with a front-end grout stop ring and a rear-end grout stop ring, and the front-end grout stop ring and the rear-end grout stop ring are arranged at intervals. A grout outlet is formed between the front end grout stop ring and the rear end grout stop ring, a sleeve valve grout outlet is formed in the sleeve valve pipe, and a sleeve valve is arranged on the sleeve valve grout outlet. The grouting replacement method of the sleeve valve pipe grouting structure mainly comprises the following steps that 1, the distance between the front end grout stop ring and the rear end grout stop ring on the grouting pipe is adjusted; 2, displacement slurry is injected from the grouting pipe at high pressure, and grouting is st