   Prepare joint slots
   Place it on concrete without cracks and clean any dust, mud, or grease from the joint opening.
Bottom frame installation, leveling, and closing
Place the bottom frame on the seam groove, bite accurately, use appropriate wedges to level the bottom frame, close the gap on the upper template, and for large and light bottom frames, when installing manhole covers, check that they are placed flat and do not shake. If necessary, even during the installation process, stop to ensure that it is placed flat.

   The positioning and fixing material adopts fast and non shrinking mortar, and the mortar is poured under the bottom frame (the mortar must be filled with the template frame). In order to ensure that the entire manhole cover plate and bottom frame can evenly withstand the load caused by traffic and not shake, the bottom frame must be in full contact with the mortar bonding material, filled and leveled. 

   Remove templates and other materials, paint the inner wall of the inspection well with mortar (if necessary), install the cellar cover plate on the bottom frame to ensure that it is in compliance (if necessary, clean the contact surface), pour asphalt concrete in the area where asphalt concrete needs to be laid, and put the inspection well into use.