Multi-arch tunnel real-time adjustment active supporting system and control method thereof

The invention relates to the technical field of tunnel construction, and particularly discloses a multi-arch tunnel real-time adjusting active supporting system and a control method thereof.The multi-arch tunnel real-time adjusting active supporting system comprises a plurality of sets of active supporting door frames which are arranged in an advance hole of a tunnel at equal intervals; the active supporting door frame has adjustability and can support the inner lining position, and a pre-active applied load is formed. When a posterior hole is excavated, the vertical pressure of part of surrounding rock is adjusted and balanced in real time through the active supporting portal, and the stress of the inner surface of the mid-partition wall is controlled to be within a safe range all the time. Compared with an existing mode of reinforcing a preceding hole lining, the multi-arch tunnel real-time adjusting active supporting system can solve the problem that the surrounding rock pressure is asymmetric before a suc