METHOD FOR IMPROVING WATERPROOFING OF A MANHOLE LID AND STRUCTURE OF MANHOLE LID PROCESSED BY THE METHOD TO PREVENT INFLOW OF DUST OR RAINWATER BETWEEN A MANHOLE HOUSING AND A MANHOLE LID

摘要

PURPOSE: A waterproofing method of a manhole lid and structure of the manhole lid processed thereby are provided to prevent rainwater or dust from being infiltrated into the manhole by forming the packing groove in the outer periphery of the manhole lid and inserting the ring-shaped packing to the packing groove. CONSTITUTION: A manhole lid is opened and collected, and the hole is covered with a temporary manhole lid. A packing groove is formed in the outer periphery of the collected manhole lid, and an adhesive is spread inside the packing groove. A ring-shaped packing(25) made of elastic rubber is inserted and mounted to the packing groove of a processed manhole lid(23). The processed manhole lid is moved into the hole, and the temporary manhole lid is removed. The manhole is covered with the processed manhole lid.