Construction method for permeable ribbed multiple-arch tunnel

The invention discloses a construction method for a permeable ribbed multiple-arch tunnel. The construction method specifically comprises the following steps: firstly reinforcing a vault slope with grouting steel tubes, and joining with anchor rods of a tunnel body system to form a continuous reinforced system; carrying out middle pilot heading excavation and then constructing an integral mid-partition; excavating tunnel chambers by adopting a procedure of a left tunnel first, and a right tunnel later; carrying out integral molding on a left tunnel ribbed arched beam with a vault longitudinal beam, an anticollision wall and an anticollision wall, and forming an annular force-bearing system with the mid-partition and an inverted arch; carrying out cyclic construction at an excavation progress being 12 to 14m according to a longitudinal construction spacing being 6 to 8m and a construction spacing of the left tunnel and the right tunnel being 30m. The construction method disclosed by the invention is a set of integral construction method aiming to the permeable ribbed multiple-arch tunnel; construction procedures, a supporting system and construction control parameters are adapted to the construction mechanical behavior time-space evolution regularity of the permeable ribbed multiple-arch tunnel, such that the safety of the construction process and the stability of a tunnel structure are effectively ensured, and a set of practical and operable construction technology is provided for promotion and application of the novel environment-friendly tunnel.