Commencement report of tunnel double block ballastless track test section
The construction method of single track laying between two inclined shafts is adopted for the construction of tunnel monolithic track bed. The installation and fixation of dual block sleepers use 60kg/m rail as the tool rail, and use the tool rail to lock the overall track bed rail surface system, to ensure that the geometric state of the rail surface is accurate, and the track bed concrete is poured and formed at one time. Through the paving of the test section, further optimize the construction technology, concrete pouring, coarse adjustment, fine adjustment and other construction machinery and equipment combination and process connection, and modify the construction scheme to improve the construction organization. The test contents specifically include: ① determining the aggregate mix proportion for construction; ② Select reasonable construction equipment; ③ Logistics organization inside and outside the tunnel; ④ Determine the standard construction method; ⑤ Determine the appropriate length of each operation section. Construction steps: working face cleaning, surveying and setting out, laying bottom layer reinforcement, manual rail breaking, installing WJ-8A fasteners, tool rail laying, adjustment and reinforcement, rough adjustment of rail panel, installation of upper layer reinforcement, insulation test, installation of longitudinal and transverse formwork, fine adjustment of rail panel, concrete pouring, concrete curing, construction technology and construction methods