3.3.8
Jacking Pipe Through Fills
Methods of operation and installation for jacking pipe through fills shall
conform to requirements specified in Volume 1, Chapter 1, Part 4 of AREMA
Manual.
3.4
JOINTING
**************************************************************************
NOTE: Where watertightness is not required,
watertight and at least one other type of joint
should be included for each type of pipe required.
Where watertightness is essential, delete paragraphs
Cement-Mortar Bell-and-Spigot Joint through Plastic
Sealing Compound Joints for Tongue-and-Grooved Pipe
below.
**************************************************************************
3.4.1
Concrete and Clay Pipe
3.4.1.1
Cement-Mortar Bell-and-Spigot Joint
The first pipe shall be bedded to the established gradeline, with the bell
end placed upstream. The interior surface of the bell shall be thoroughly
cleaned with a wet brush and the lower portion of the bell filled with
mortar as required to bring inner surfaces of abutting pipes flush and
even. The spigot end of each subsequent pipe shall be cleaned with a wet
brush and uniformly matched into a bell so that sections are closely
fitted. After each section is laid, the remainder of the joint shall be
filled with mortar, and a bead shall be formed around the outside of the
joint with sufficient additional mortar. If mortar is not sufficiently
stiff to prevent appreciable slump before setting, the outside of the joint
shall be wrapped or bandaged with cheesecloth to hold mortar in place.
3.4.1.2
Cement-Mortar Oakum Joint for Bell-and-Spigot Pipe
A closely twisted gasket shall be made of jute or oakum of the diameter
required to support the spigot end of the pipe at the proper grade and to
make the joint concentric. Joint packing shall be in one piece of
sufficient length to pass around the pipe and lap at top. This gasket
shall be thoroughly saturated with neat cement grout. The bell of the pipe
shall be thoroughly cleaned with a wet brush, and the gasket shall be laid
in the bell for the lower third of the circumference and covered with
mortar. The spigot of the pipe shall be thoroughly cleaned with a wet
brush, inserted in the bell, and carefully driven home. A small amount of
mortar shall be inserted in the annular space for the upper two-thirds of
the circumference. The gasket shall be lapped at the top of the pipe and
driven home in the annular space with a caulking tool. The remainder of
the annular space shall be filled completely with mortar and beveled at an
angle of approximately 45 degrees with the outside of the bell. If mortar
is not sufficiently stiff to prevent appreciable slump before setting, the
outside of the joint thus made shall be wrapped with cheesecloth. Placing
of this type of joint shall be kept at least five joints behind laying
operations.
3.4.1.3
Cement-Mortar Diaper Joint for Bell-and-Spigot Pipe
The pipe shall be centered so that the annular space is uniform. The
annular space shall be caulked with jute or oakum. Before caulking, the
SECTION 02630
Page 33
Previous Page
