Hainan plastic inspection well
(1) The length of the shaft shall be the height from the bottom of the socket connecting the shaft to the design ground minus the distance from the top of the shaft to the ground. When it is difficult to accurately determine the ground or pavement elevation, an allowance can be properly reserved for the shaft length.
(2) The shaft shall be inserted into the well seat vertically. When inserting the shaft, it is not allowed to use a heavy hammer to knock, but a special tightening tool shall be used.
(3) After the installation of the shaft, the upper opening shall be temporarily blocked.