| 摘要 |
PURPOSE: A connecting structure for a drainpipe of a manhole is provided to improve work efficiency for connecting a drainpipe to a connection passage of a manhole and to prevent a water leakage by sealing up a gap of a connection firmly and tightly. CONSTITUTION: The connecting structure for a drainpipe of a manhole(10) comprises the steps of installing an expansion tube(30) having a filling space(31) to expand the volume around the outer circumference of an end(21) of a drainpipe(20) fitted to a connection passage(11) of a manhole(10) and an injection port(32) connected with the filling space(31), and filling up the filling space(31) with inorganic fillers(40) through the injection port(32) of the expansion tube(30), wherein the expansion tube(30) is expanded to the connection passage(11) of the manhole(10) and the end(21) of the drainpipe(20) to solidify the inorganic fillers(40) filled in the filling space(31) to seal up a gap(A) of a connection effectively.
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