Rapid construction method for special-shaped mid-partition wall of multi-arch tunnel

The invention provides a rapid construction method for a special-shaped middle partition wall of a multi-arch tunnel. The rapid construction method comprises the steps that firstly, a foundation is reinforced; 2, reinforcing steel bar binding is conducted, specifically, 1-2 sets of reinforcing steel bars are bound in advance before the foundation is reinforced in the step 1; thirdly, steel plates are prefabricated, and the multiple machining procedures are sequentially and circularly operated to drive the multi-arch tunnel special-shaped mid-partition wall to be rapidly formed; the multiple machining procedures comprise the fourth step of walking and positioning of the mid-partition trolley; a special-shaped formwork is arranged at the top of a mid-partition trolley formwork, and a corner formwork capable of sliding and rotating is arranged at the bottom of the mid-partition trolley formwork The arched connecting support is arranged at the front end of the top of the mid-partition trolley, so that an assembly