Novel die bag water filtering hole sewing machining and constructing method

The invention discloses a novel die bag water filtering hole sewing machining and constructing method. After die bag cloth is discharged and primarily sewn, holes are formed in the fixed positions in a burning manner to serve as water filtering holes, pipe protection cloth matched with the holes in diameter is prefabricated, the upper holes and the lower holes of a die bag are connected through the pipe protection cloth through the overseam technology, the water filtering holes with the pipe protection cloth are formed, and water filtering pipes are then inserted in the pipe protection cloth of the die bag water filtering holes. The water filtering pipes are isolated from concrete through the pipe protection cloth, and the phenomenon that water filtering pipes slide down along with ash during concrete filling is effectively avoided; and meanwhile, the thickness of the die bag concrete at the water filtering hole parts is guaranteed, and the too large thickness deviation at the water filtering hole parts is greatly reduced. Due to the fact that the overseam technology is adopted in the pipe protection cloth, an upper-layer die bag body and a lower-layer die bag body, the hole forming size is uniform, and the die bag concrete appearance quality is greatly improved. Meanwhile, the reasonable concrete flushing and filling sequence is adopted, longer time can be reserved for filtering out of laitance in concrete while the construction efficiency is not influenced, and the die bag filling thickness is guaranteed.