Cement pipe is an indispensable drainage pipe in urban construction. In order to ensure that the cement pipe can have a good drainage function, attention must be paid to the connection and drainage pipe and the device. The drainage pipe of the heavy cement pipe mainly has the following points: :
① On the inner surface of the socket of the cement pipe and on the outer surface of the socket, the oil pollution, debris, etc. should be removed and cleaned.
② Make sure that the circumference of the cement pipe is even and smooth without any distortion.
③Cut the normal pipe section into two half-section pipes. The outer section pipes with sockets should be arranged in the inflow direction of the manhole, and the half-section cement pipes with sockets should be arranged in the outflow direction of the manhole. When the depth of the manhole floor is the same as that of the cement pipe, concrete and gravel sand shall be used to fill the disturbed soil foundation. If the pipe end or tail of the manhole floor is more than 250㎜, pipe pillows and cushions shall be provided. board.
④ Determine the center position of the cement pipe according to the elevation template, draw the iron support column vertically, pull the center line, and hang the vertical line.
⑤ When the pipe section is closed, use lifting equipment for lifting row operation, and the electric hoist of the hand hoist is used to place the pipe section. For the pipe section within Φ600 of the hand hoist, two 1.5T ~ 3.0T hand hoists should be used for operation. If you choose an electric hoist, you should choose different tonnage hoists based on different diameters of the cement pipe. Before the tube joint is closed, the outer surface of the ring should be coated with a neutral lubricant evenly. When closing, the chain hoist on both sides of the tube joint should start and pull at the same time, so that the rubber seal can be correctly positioned, not distorted or detached. , The centerline of the pipe section is kept 220 ~ 230㎜ evenly between the end and the tail of the socket.
⑥ When piping is carried out, the slope of the piping should be corrected with a spirit level. The elevation of the bottom of the two sections of cement pipes in each row should be used to check the elevation of the bottom of the pipe once. The order of the pipes is from downstream to upstream, with the sockets facing downwards and the sockets facing upwards.
The discharge of heavy cement pipes according to the above manner can effectively ensure the service life and effect of cement pipes.