WITH COMBINATION STRUCTURE OF THE MANHOLE AND THE MANHOLE COVER AND THE HEIGHT ADJUSTMENT RING AND THE MANHOLE OF THE MANHOLE WHICH IT FORMS

A coupling structure of a manhole, a manhole height regulating ring and a manhole cover is provided to prevent breakage and deformation by absorbing shock and increasing strength on a connection of a manhole and a manhole cover and to maximize watertightness by cutting off the inflow of impurities such as rainwater and isolating the inside and the outside of a manhole perfectly. A coupling structure of a manhole, a manhole height regulating ring and a manhole cover is used to prevent deformation or breakage caused by external impact or ground subsidence after the installation of a manhole by forming press-fit sockets(18) on the top of regulating rings(17) and an uppermost slab surface(13) of a manhole body and forming press-fit portions(19) on the bottom of the regulating rings, forming press-fit grooves(11) and press-fit projections(12) on the top and the bottom of the regulating ring installed on the uppermost slab surface of the manhole body and forming press-fit grooves and press-fit projections(16) on the uppermost slab surface of the manhole body or a body(14) of a manhole cover, and then coupling the uppermost slab surface of the manhole body, the regulating rings and the body of the manhole cover with the press-fit method, and forming vertical through holes(21) on the regulating ring and nuts or insertion holes(22) on the slab surface of the manhole body and inserting fasteners(23) such as long bolts or reinforcing bars to bolt fastening holes(24) formed on the body of the manhole cover, and then coupling with the nuts or the insertion holes of the slab surface of the manhole body. In addition a synthetic resin layer is formed on the contact surface of the regulating rings, the slab surface of the manhole body or the body of the manhole cover to cut off the inflow of rainwater, to increase coupling strength and to prevent deformation.