Volume-IF - JantERmantER

DCPL-K4A02
d) The pipe culverts shall be made with proper care regarding the invert
of the pipe, gradient, if any, etc. as specified on drawings and/or as
instructed by the Engineer.
e) Where R.C.C. pipes are encased in concrete at road crossings or at
other places the pipes need be suitably supported avoiding
reinforcements of concrete blocks, joints properly done before
concreting is taken up. Concreting of total height of block may be
done in a single operation or may be done upto some height for
pipes to be properly laid in position and remaining height of block to
be concreted subsequently.
f) The R.C.C. pipes shall be joined with cement mortar. Cement mortar
shall consist of 1 part cement and 2 parts of clean sand with only
enough water for workability. Procedure of jointing shall be as per
IS:783 - latest edition.
3.12.3 Relation with Water Supply Pipeline
Unless specifically cleared by the Engineer, under no circumstances shall
drainage pipes be allowed to come close to water supply pipelines.
3.13.0 Manholes and Inspection Chambers
3.14.0 Masonry
3.14.1 Brick Masonry
The maximum distance between manholes shall be 30 meter unless
specifically permitted otherwise. In addition at every change of alignment,
gradient or diameter there shall be a manhole or inspection chamber. The
distance between manhole or inspection chamber and gully chamber shall
not exceed 6 meters unless permitted otherwise. Manhole shall be
constructed so as to be water-tight under test. The channel or drain at the
bottom of chamber shall be plastered with 1:2 cement sand mortar and
finished smooth to the grade. The channels and drains shall be shaped and
laid to provide smooth flow.
Connection to existing pipelines shall be through a manhole.
Manholes shall be provided with standard covers, usually C.I. or as directed
by the Engineer. The covers shall be close fitting so as to prevent gases
from coming out.
All bricks shall be of first class (Class A) quality, well burnt, of uniform size,
shape and colour free from cracks, flaws or nodules of free lime. Bricks
shall be soaked in water for at least two hours prior to use and shall be laid
truly horizontal and vertical in headers and stretchers with cement mortar
consisting of one part of cement and four parts of sand, unless otherwise
mentioned in the schedule of Items or directed by the Engineer, in
layers not exceeding 1.5 M in height. Each layer shall be allowed at least 24
(PCA.775.S034sca7) V.II-D2/S-VII : 27