particular specifications (road works) - CIDCO Maharashtra Ltd.

CIDCO OF MAHARASHTRA LTD
C.A.No.01/CIDCO/SE(KHR)/EE(KHR-I)/2010–11 Pg. No. 455
5.0 MEASUREMENT LENGTH OF EXCAVATION
The lengths of excavation for trenches will be measured from and
clear of the settled width allowed for the excavation of trench from
which it starts on which it come into contact and the centre of the
pipe or masonry for which the trench has been excavated shall be
considered as the centre of such trench.
6.0 A GRIP TO BE CUT WHERE PIPE SOCKET OCCURS
Wherever a pipe socket occurs a grip is to be cut in the bottom of the
trench or concrete bed to a depth of atleast 75 mm below the bed of
the pipe so that the pipe may have a fair bearing on its shaft and to
rest upon its socket. Such grip shall be of sufficient size in every
respect to admit the hand all around the socket in order to make the
joint, and the grip shall be maintained clear until the joint has been
passed by the Engineer.
7.0 TRENCHES IN ROCKY GROUNDS
The trenches for pipe drains, if in stony or rocky ground, are to be
excavated all along to the full depth of 75 mm below the intended
level of the bed of the pipes to be laid therein, and layer of soft
clean earth 75 mm thick is to be deposited for the reception of the
pipes and in case where a layer of the concrete and/or precast block
is required to be placed below the pipe line, the bottom of the
excavation shall not be higher at any point than the bottom of the
concrete layer or block.
Wherever excavation is done in rock, the excavated stuff shall be
stacked separately for chiselled rock and blasted rock. The
excavation shall be paid or stack measurement with deduction of
40% for voids to be made from the stack measurement.