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Specification for installation of metal culverts pipe
Specification for installation of metal culverts pipe
(1) work before installation: check the flatness, level and elevation of the bottom foundation of metal culverts pipe;
Check civil construction datum, determine metal culverts pipe location, central axis, midpoint.
(2) connect the installation of metal culverts pipe: according to the actual situation of metal culverts pipe, the discharge of metal culverts pipe,
if the inlet and outlet of culverts on both sides is the inclined mouth form with the slope of the roadbed, the installation of the middle pipe section first,
the location of the inlet and outlet is set aside in the length direction of the foundation.
After the installation of the intermediate pipe, install the inlet and outlet on both sides after the calibration is in place.
Discharge from one side of the first root socket when installation, make them parallel to the longitudinal center line of metal culverts pipe center and foundation,
is also the second root canal is placed in position, when the two root canal 3-5 cm away from the gap between adjacent flange,
with a small crowbar on the flange bolt hole, the two root canal on the flange bolt hole is, at this time the other end of metal culverts pipe from the second quarter with jack move socket,
Make it vertically flat so that the distance between the two flanges is about 2cm, then put on all the bolts, screw the screws, with a flat buckle.
Thereafter, the middle metal culverts pipe section of each culvert is connected in this way successively. The middle metal culverts pipe section of each culvert has no sequence and can be connected at will.
(3) Asbestos Pad:
Due to reasons such as the site topography and sometimes adjacent small spacing between the two flanges and then hammer chisel cut about 1 cm between the two flanges of the aperture, the asbestos pad with screwdriver set between two flanges, sometimes metal culverts pipe flange spacing is bigger, the top two asbestos mat set with difficulty, with tie silk tied asbestos pad on the bolt is fixed, and then workers start symmetric lock screw.Until there is only a 2-3m gap between the two flanges when viewed from the outside.
(4) anti-seepage treatment inside and outside the tube wall: the tube wall is coated with emulsified asphalt or hot asphalt two, from the outside of metal culverts pipe wall evenly coated with black pipe can be. Generally, the thickness of asphalt coating should reach lm
(5) calibrate the whole metal culverts pipe with a jack, so that its center is on the Central Line specified
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