Construction method of enclosure system shared by cast-in-place pipe gallery and box type tunnel

The invention relates to a construction method of an enclosure system shared by a cast-in-place pipe gallery and a box type tunnel. The construction method comprises the steps that construction preparation is conducted; constructing a shared enclosure wall; and wall toe grouting. The method has the beneficial effects that the square hammer is adopted for finishing the underground diaphragm wall construction groove wall, and the construction quality of the underground diaphragm wall and the stability of the groove wall are improved; the cutting blade is rotated and folded towards the side of the underground diaphragm wall groove wall finishing square hammer through the rotating shaft under the influence of factors such as slurry in the descending process of the square hammer, and is rotated and unfolded towards the outer side of the square hammer in the lifting process of the underground diaphragm wall groove wall finishing square hammer, so that the effect of cutting and finishing the groove wall is achieved;