Construction method for renovating tunnel lining water seeping damage

The invention discloses a construction method for renovating tunnel lining water seeping damage. The method solves the problem of sealing and blocking quality control of a groove passage and the connection with the lining at two sides in the traditional tunnel lining water seeping damage control process. According to the method, firstly, a trapezoidal groove passage in the annular direction of the tunnel is formed in a water seeping position on the tunnel lining, a guide and discharge pipeline and a reinforcing mesh are arranged in the trapezoidal groove passage, expansion screw bolts used for fixing the reinforcing mesh are arranged on the two side walls of the trapezoidal groove passage, a plurality of lining plates are arranged, sealed and covered on the groove passage, in addition, the concrete is respectively filled into the groove passage in a sequence of the side wall, the arch waist and the arch top, and is compactly vibrated and beaten, and the lining template is removed after the concrete intensity meets the requirements. The method adopting the reinforcing mesh and the lining template for cooperated fixation is adopted, the connection between the filling materials in the groove passage and the lining at the two sides is optimized, the firmness of the filling materials is enhanced, and the falling of the filling materials is effectively prevented. The construction method has the advantage that under the condition of meeting the construction safety, the operation safety of the existing railway is also ensured.