pearlite水利水电英文翻译

2021年1月20日发(作者：nb是什么意思)
英文

Placing and protecting fill
Fill
shall
be
placed
so
that
mo
part
of
the
final
foundation
surface
remains
exposed for more than 72 hours.
Fill shall be placed in such methods as will prevent segregation of the material.
Where
the
Contract
requires
the
placing
of
different
types
of
fill
in
separate
zones,the
Contractor
shall
carry
out
the
work
so
as
to
prebent
mixing
of
different
types of there be ,in the opinion of the Engineer, any excessive mixing of
different
types
of
fill
,
such
mixed
materials
shall
be
removed
to
a
spoil
tip
and
replaced with fresh fill.
Any undesirable material accumulated on the fill surface shall be removed before
placeing the next layer of fill material shall be placed on a previous layer of
that
has
dried
out,become
saturated
or
in
any
way
deteriorated
by
exposure
or
by
spilling of other material or disterbance by mechanical transport or by deposition of
wind blown particles or by any other means. Before fresh fill material is placed aoo
such deteriorated fill or foreign material shall be removed to a depth at which material
of an acceptable standard is exposed. The surface of each layer is to be approved by
the Engineer before the next layer is placed.

Any
fill
shall
be
placed
in
uniform
layers
not
greater
than
the
approved
thickness as specified hereafter and in an orderly sequence approximately horizontal
along the centreline of the where specified of directed otherwise,
no
portion
of
any
embankment
shall
be
stepped
more
than
3
feet
higher
than
any
immediately adjacent portion except where permitted by the Engineer and the slope
formed by such steps shall not exceed 1V:3H and not less than 1V:4H from one level
to

as
shown
on
the
Drawings
or
as
otherwise
directed,
all
fill
placement surfaces shall be sloped at right angles to the centerline of the embankment
in both the upstream and downstream direction from the downstream edge of the core
so as to allow run-off and prevent the accumulation of water. The drainage slope on
the
temporary
surface
of
anny
zone
shall
not
exceed
1
on
30
and
the
highest
point
shall be de downstream edge of the core.
Where,due
to
the
specified
geometry
of
the
excavation
into
the
top
of
the
existing embankments, the surface slope is towards the downstream edge of the core,
the
Contractor
shall
take
such
measures
an
necessary
to
prevent
erosion
of
fine
material being washed into the filter zones downstream of the core. Any surface layer
of filter material contaminated by such drainage or other cause shall be removed and
replaced with fresh filter material before placing the next layer above.

Construction of any
one embankment
shall be
carried out
over the maximum
possible length,mo less than 1500 feet,of that embankment in such a manner that mo
temporary construction slope crosses the axis of the embankment except as approved
by
the
Engineer.
Where
a
temporary
constrction
slope
crossing
the
axis
of
the
embankment is permitted by the Engineer it shall be formed at a gradient of 1V
：
5H.
When subsequently placeing material against this slope it shall be cut back in steps
equal
to
the
layer
thickness
to
avoid
feather
edges.
The
Contractor
shall
complete
each layer of fill fully up to the abutment contacts and structures and against sloping
foundations
and
ensure
that
the
fill
is
compacted
an
specified
throughout.
The
Contractor shall not allow the fill in those areas to lag behind or to get ahead of the
normal
fill
placing
operations
and
form
feather
edges,
except
where
fill
has
been
placed in advance to cover grouted surface.
Where
the
Contractor
is
allowed
to
use
either
grvel
fill
and
/or
sandstone
no
intermixing
of
the
two
materials
in
a
layer
shall
be
allowed.
The
Constractor
may
place either of the materials in adjacent layers or sections of the embankment.
The
Constractor
shall
be
responsible
for
protecting
temporary
fill
surfaces
against damage of erosion. At the end of each working day,or if it start to rain ,the
surface
of
the
fill
shall
be
made
smooth
and
compacted
with
a
smooth
drum
roller
with a drainage slope to induce runoff from the filled areas and leave no areas that can
retain water. Where necessary, grips,drainage ditches and the like shall be formed to
assist
drainage
and
to
prevent
runoff
from
damaging
placed

from
heavy rain
shall
be controlled to
prevent
gully erosion of the placed fill.
Any
gully
erosion
shall
be
repaired
with
material
compacted
in
accordance
with
the
Specification,
and
eroded
surfaces
shall
be
restored
and
graded
to
ensure
a
proper
bond
with
new
fill
placed
on

eroded
material
other
than
gravel
and
any
contaminated
material
shall
be
removed
from
the
embankment
and
placed
in
designated
spoil
tips.
In
particular
the
Contractor
shall
ensure
that
no
material
is
washed into filter or drain material.
Where
placing
of
the
filter
material
of
drain
material
is
not
continuous
,the
Constractor shall protect such filter or drain materials by a 2 foot thick layer of course
filter material or in such other manner approved by the Engineer,and the Contractor
shall maintain the protective layer.
The Contractor shall keep the work free from standing water to prevent damage
to the fill material. When working below the surrounding level, the Contractor shall
ensure that material from adjacent areas does not contaminate the fill material,and that
runoff does not flow onto the fill.
The Contractor shall arrange the timing and rate of placing fill material in sucn
way that no part of the workes is over

stressed,weakened or endangered. Any part of
the
fill
that
be
comes
saturated
or
attains
excessive
moisture
content
or
that
is
rendered unsuitable due to poor surface drainage, uncontrolled traffic,or for any other
reason,
shall
be
excavated
and
removed
to
a
spoil
tip
and
replaced
by
fresh
fill .If
permitted by the Engineer, such fill may be scarified and re- compacted.
Unless
otherwise
approved
by
the
Engineer
unrestrained
edges
of
fill,
whether
for
temporary
or
permanent
slops,
shall
be
overbuilt
as
necessary
to
allow
full
compaction to be achieved within defined limits of the fill. The excess material shall
be trimmed and removed to leave a regular compacted surface.
Slope exposed to view,including riprap and downstream protection slopes, shall
be dressed to neatly appearing final surfaces matching the existing slopes.
Temporary access ramps shall be removed when work in that area is completed.
Any ramps or other areas within the limits of an embankment which, in the opinion of
the
Engineer
have
been
over-compacted
or
damaged
by
the
concentrated
use
by
construction
equipment,shall
be
reworked
and
re-compacted
or,if
the
Engineer
requires,shall be excavated, removed to spoil tip and replaced by the fresh fill.
When
necessary
the
surface
of
the
layer
of
fine
grained
fill
material(rolled
clay,rolled silt Type A and B ,Rolled Sandstone Type A and B) shall be sprayed with
water to prevent drying out and to maintain the correct uniform moisture content prior
to
placing
the
next

Contractor
shall
ensure
that
a
good
bond
is
achieved
between
layers
of
filland
unless
otherwise
directed,
previously
compacted
layers
of
fine grain materials shall be harrowed, scarified or otherwise roughened to depth of at
least 3 inches and made suitable for covering with future layer of fill.