Volume-IF - JantERmantER

DCPL-K4A02
3.4.0 Clearing and Grubbing etc.
3.5.0 Classification
The area to be excavated or filled shall be cleared out of fences, trees,
logs, stumps, bush, vegetation, rubbish, slush, etc. and levelled up. Trees
upto 300 mm girth shall be uprooted. Trees above 300mm girth which
are required to be cut, shall be got identified by the Engineer and then
marked.
Felling of trees shall include taking out roots upto 600 mm below ground
level. After the tree is cut and roots taken out, the pot- holes formed shall be
filled with good earth in 250 mm layers and compacted to acceptable
degree unless directed by the Engineer otherwise. The trees shall be cut in
suitable pieces as instructed by the Engineer and then shall be transported
to the Owner's store or any other space as directed by the Engineer.
Before earthwork is started, all the spoils and unserviceable materials
and rubbish shall be burnt or removed from the site to approved disposal
areas as may be specified. Ash shall be spread or removed as directed by
the Engineer. Useful materials, saleable timber, firewood, etc. shall be the
property of the Owner and shall be stacked properly at the worksite in a
manner as directed by the Engineer.
Materials involved in earthwork shall be classified under the following
categories. No distinction will be made whether the material is dry or wet.
The Engineer's decision in regard to such classification shall be final and
binding on the Contractor :
a) Ordinary and hard soil
This shall include clay, silt, sand, moorum, shingle, kankar, gravel,
loam, peat, ash and other similar materials in soft, hard or dense
state which can generally be excavated with ordinary spade, pick
axe, shovel etc. and does not require the use of wedges,
pneumatic breaking equipment and/or blasting for removal. It
shall also include loose rock boulders present in the soil, with
dimensions not exceeding 500 mm in any direction. Breaking of
consolidated brick ballast and mud concrete shall be considered
equivalent to excavation work under this type of soil.
b) Soft and Decomposed Rock
This shall include rocks like chalk, slate, mica schist, laterite and
other similar materials which in the opinion of the Engineer is
rock, but does not require blasting for removal and could be
removed with picks, hammers, crow bars, wedges, pneumatic
breaking equipment etc. It shall also include boulders with
dimensions greater than 500 mm but not exceeding 1000 mm in any
direction. The mere fact that the Contractor resorts to blasting for
his own convenience shall not mean that the rock will be classified
as hard rock.
(PCA.774.S034sca) V.II-D2/S-I : 6