Fixing device of annular tunnel lining buried-in water stop

A fixing device of an annular tunnel lining buried-in water stop comprises an upper positioning formwork and a lower positioning formwork, the lower positioning formwork is fixed to an end flange of a lining trolley through bolts, a horizontal supporting frame and a lining end mould supporting frame are welded to the end flange of the lining trolley, the upper positioning formwork is installed at the top end of the lower positioning formwork, the buried-in water stop is installed between the upper positioning formwork and the lower positioning formwork, omega-shaped spacer bars are installed on one side of the upper positioning formwork and one side of the lower positioning formwork, fixing bolts are installed on the other side of the upper positioning formwork and the other side of the lower positioning formwork, a wood board is installed between the upper positioning formwork and an initial tunnel support, and the wood board is connected with a supporting rod. The problems that because a traditional tunnel lining annular buried-in water stop is uneven in installation shape and is not at the center, the water stopping effect is poor, and lining construction joints are prone to water leakage in a later period are solved. The fixing device of the annular tunnel lining buried-in water stop has the advantages of being simple in structure, convenient to mount and demount and beneficial to quality control, a positioning tool can be used repeatedly, circulation is convenient, the construction period is shortened, construction quality is guaranteed, and the water stopping effect of an annular tunnel lining construction joint is improved.