Super-shallow-buried section tunnel construction method

The invention relates to the field of tunnel construction, and discloses a super-shallow-buried section tunnel construction method. The method includes the following steps of arranging a plurality of large-scale lead pipe sheds along the outer side of a tunnel excavation contour line at intervals, wherein the large-scale lead pipe sheds are obliquely arranged along the tunnel excavation contour line at a set angle; arranging lead medium pipe sheds between the adjacent large-scale lead pipe sheds, wherein the lead medium pipe sheds are obliquely arranged along the tunnel excavation contour line at a set angle; excavating an upper step through weak blasting under the lead supporting of the large-scale lead pipe sheds and the lead medium pipe sheds, and applying initially-sprayed concrete to the upper excavation face of the upper step; laying a reinforcing steel bar net on the upper excavation face of the upper step, erecting an upper step steel frame, arranging locking anchor pipes on arch legs on the upper step steel frame, spraying concrete on the upper step steel frame, and arranging radial anchor rods and conducting grouting after the concrete is solidified. By means of the method, the construction progress of a super-shallow-buried section tunnel can be accelerated, and the construction quality can be improved.