Side Slope Operation

7/29/2019 Side Slope Operation

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Side Slope

Operation


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CUT SLOPESThe soil & rock are cut & excavated stability content

decrease.

meanwhile

The renovating done the slope cutting ready & safe.

Slope excavation takes place- original soil level higher

then level of new road formation to built.

Cut slope for equivalent soil strata.


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Cut slope

for variablesoil strata

Type of soil Cutting depth Sloping

Solid rock 1:0.3 -1:0.0

Rock 1:0.5 -1:1.2

Sand 1:0.5 -1:1.0

Sandy soil 0-5 1:0.8 -1:1.2

Compact earth 5-10 1:1.0-1:1.2

Sand, loose 5-10 1:1.2-1:1.5

Clay soil 0-10 1:0.8-1:1.2

Clay-stone 5-10 1:1.2-1:1.5

Table for safely slope cutting


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Problem in cut slope

Ways to overcomethe problem

i) Prepare slope-suitable slantingdegrees.

ii) Turfing slope areas-maintain soil stability.

iii) Hydro seeding use toplant the plant on alkalisoil.

iv) Use Geofabric orgeotextileavoid diffusionof ground water.

Method toovercome the

problem

i)Build the fencingalong slope areas.

ii)Use a net.

iii) Gabion block.

> in soil also

influences stability of

soil.

> Storey & soil

drainage- important.

> Sub-soil drains used

to control the flow of

infiltration.

landslide Water infiltration


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Embankmentslope

Equivalent

materials

Different materials


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LandslideWays to

overcome the

problem:

Turfing- Planting the

plants for slope

protection.

Prepare the slope with

suitable degrees.

Use gefabric & geotextile

avoid diffusion of

ground water.

Problems in slope

banking

Prepare the drainage

system- let the water

flow easily. Grow plants- cover

the slope surface.


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DeterminationOf R.O.W(Itincludes roadwidth, shoulder

width & spare

area of road)


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Site clearing

operationCutting

grubbing

Discard

Top soil

Cutting trees in R.O.W waste of trees is shifted

Stump and root are being strippedwith a depth of 500-1000mm fromproposed level sub grade

Backfill holes before starting anembankment works

Discard bushed

Machinery:-i. Bulldozerii. Excavatoriii. scrapper

Top soil- only suitable for crop

Could not bearing load

Need to be discarded until fixeddepth

A good soil will be kept forgrass/tree cultivation

Machinery:-

i. Bulldozer

ii. Excavator

iii. Transporters, e.t.c.


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. If road formation level under soil

origin level

.Cutting also can occur in area of soil

borrow pit for embankment purpose

.if road formation level higher

than soil origin level

. Clearing works should be

done first if :-

Embankment < 3m

Origin soil surface rugged

Sloping soil surface

SOIL

WORK


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> Slope will beformed by cutting

works orembankment works

for formation level ofroad

< Slope failure cause

. Unperfect works

. Increasing ofmoisture content

. Increasing ofapplied load

OPERAT

ION OFSIDE

SLOPE


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CUTTING SLOPE PROBLEMS

LANDSLIDE

SCREE

WATER

ASORPTION

Cutting at safe slant

Plant grass

Install geofabric/geotextile

Mortar cement rendering

Build retaining wall

Install steel netting

Build safety fence

Mortar cement rendering

Build stone mooring

Drainage system:-

Bypass drain, shelf drain, roadside drain and

underground drain

PROBLEMS SOLUTION


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CUTTING SLOPE

SOLUTION


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EMBANKMENT SLOPE PROBLEMS

PROBLEMS

Landslide

Erosion

Deposition

Perfect compaction

Plant grass Install geofabric/geotextile

Build retainingwall

Plant grass

Surface Drainage System

(e.g: toe drain , dike drain , roadshoulder drain and culvert)

Perfect compaction

Discard top soil

Use a selected fill material

SOLUTION


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EMBANKMENT SLOPE

SOLUTION


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Documents

Side Slope Operation