| 摘要 |
PURPOSE: A protector for repairing a manhole is provided to prevent accidents and traffic block, and to reduce expenses by restoring the road quickly and curing the concrete stably with installing the manhole protector after repairing. CONSTITUTION: A manhole protector is composed of a body(10), a lid(20), a slip preventive plate(30), an air bag(40) and an air injection port(50). The manhole protector body is installed in the manhole holder, and the arc protector is protruded on the road pavement to minimize inconvenience of the road under construction. The air injection port and the air bag are inserted vertically to the body, and air is injected to an air injection valve(43) by an air pump. Accidents are prevented by curing the concrete stably without load with covering the lid, and displacement of the protector is restricted by a protector displacement restricting bar(14) and the air bag.
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