Sewer well treatment method and fast-setting cement mortar dry blend

The invention discloses a sewer well treatment method and a fast-setting cement mortar dry blend. The sewer well treatment method includes the steps of (1) carrying out cutting to form an annular zone around a sunk sewer well cover, and taking out the sewer well cover, (2) digging out basic layer materials of the annular zone, placing a prefabricated piece at an opening of a sewer well, placing the well cover on the prefabricated piece, and adjusting the horizontal position to enable the upper surface of the well cover to be flush with the road surface, and (3) pouring the annular zone dug out around the prefabricated piece with fast-setting cement mortar. According to the sewer well treatment method, the strength of a structure around the sewer well is improved, rainwater is prevented from permeating the sewer well, and the sinking problem of the urban sewer well can be effectively solved. The construction speed is high, and traffic is not influenced. The fast-setting cement mortar dry blend comprises cement, sand, expanding agents, water reducing agents, calcium oxide and the like. The sewer well treatment method and the fast-setting cement mortar dry blend are suitable for treating the sewer well of the cement road surface and the sewer well of the pitch road surface.