application of jute geotextiles for construction of rural...
TRANSCRIPT
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APPLICATION OF JUTE GEOTEXTILES FOR
CONSTRUCTION OF RURAL ROADS UNDER PMGSY
Presentation by
P K Choudhury
Principal Technologist
National Jute Board
Ministry of Textiles, Govt. of India
Kolkata
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What is geotextile -
• Geotextile is the fabric which enhances the engineering
properties of soil when applied in or on soil.
• Natural Geotextile like, Jute Geotextile (JGT) deserve
separate mention because of its natural resource,
annual renewability and unique features
• There is hardly any difference between synthetic
geotextiles & JGT function-wise excepting the aspect of
long term durability of synthetic GT. The term
geosynthetics encompass both man made and natural
geotextiles
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Jute in Textiles - Background
• Jute fibre was tried first among all natural fibres for ground improvement after their confirmed effectiveness as the ingredient in flexible packaging
• The British were the first to discover its potential, which was confirmed by tests at Dundee, Scotland in 1791.
• Jute sacks became popular & were used in Crimean War (1854-1856) & American Civil War (1860-65)
• Growing demand of sacks led to setting up of the first jute mill in 1855 near Kolkata followed by several other mills in the undivided Bengal
• Jute industry is perhaps the oldest surviving agro-industry in the world
• Jute fabric was applied in a road at Dundee in Scotland in 1920, at Strand Road in Kolkata by Bengal PWD in 1934 and in Myanmar during the 2nd World War with success?
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USP OF JUTE
• High tenacity—comparable to man-made fibres
• High initial modulus—even higher than coir
• Low elongation at break—lowest among all natural
fibres—can provide good membrane support under load
• Highly hydrophilic –highest among all fibres
• High roughness Co-efficient- ensures better load
transference
• Excellent spinnability / weavability due to high cellulose
content- enables manufacture of customized geotextile
• Very high thermal stability—around 170°C
• Most drapable of all fibres- can shape itself to soil
contours
• Eco-concordant—Renewable resource : helps reduce
carbon foot print in construction
• Abundantly available
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JUTE PLANT TO FABRIC ( GEOTEXTILE )
Plant Fibre
YarnFabric
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760 gsm 760 gsm 1200 gsm
NON WOVEN JGT 500 & 1000 gsm OPEN WEAVE JGT - 292, 500 & 730 gsm
A glimpse of JGTs viz. woven, nonwoven open
weave etc. those have so far been developed by
IJIRA and used in various civil engineering
applications with success.
627 gsm 724 gsm
WOVEN
JGT
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Chemical Constituents of jute fibre.
Constituents %
Cellulose 60 – 62
Hemi Cellulose 22 - 24
Lignin 12 – 14
Others 1 – 2
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Properties of Natural Fibres vis-à-vis Synthetic Fibres
A fibre would be suitable for manufacturing Geotextiles / Agrotextiles when it possesses suitable mechanical andhydraulic properties
Type of
fibre
Tenacity
N/tex
Extension
at break
(%)
Initial
modulus
N/tex
Volume
swelling
%
Moisture
regain %
Lignin
content
%
Jute 0.3-0.9 1-1.8 17 - 19 44.3 12-14 12-14
Coir 0.18 41-45 4.22 - 10 30
Sisal 0.37 - 4.7 1.9-4.5 25 - 26 39.5 11-14 9.9
Polyester 0.3-0.8 15 - 55 6 - 12 - 0.4-0.6 Nil
Polypropy
lene
0.3-0.8 15 - 35 2 - 9 - <0.1 Nil
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Construction /
Parameters
D W Plain for use in
rural road
DW Plain for use in river
bank ( rot resistant)
Width (cm) 100 - 200 cm 100 - 200 cm
Weight (gsm) at 20 % MR 724 (- 5%, + 10%) 627 (- 5%, + 10%)
Tensile strength (kN/m) MD x CD ≥ 25 X 25 ≥ 20 X 20
Ends X Picks / dm ≥ 94 X 39 ≥ 85 X 32
Thickness (mm) 1.85 (± 10%) 1.70 (± 10%)
Elongation at break (%) MD X CD ≤ 12 X 12 ≤ 12 X 12
Puncture Resistance (kN) 0.500 (± 10%) 0.400 (± 10%)
Burst Strengnth (KPa) 3500 (± 10%) 3100 (± 10%)
Permittivity at 50 mm const. head (/s)350 x 10-3 (± 10%) 350 x 10-3 (± 10%)
A.O.S. (Micron) O95 150 - 400 150 - 400
TECHNICAL SPECIFICATIONS OF TWO TYPICAL VARIETIES OF WOVEN JGT
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Technical Specifications of Three Typical
Varieties of Open Weave Jute Geotextile
TYPE /PROPERTIES
1 2 3
Weight (g/m2) at 20%
M.R.
500± 10 % 600± 10 % 700± 10 %
Threads/dm (MD x
CD)
6.5(+4, -2) x
4.5(+4, -2)
8 (+4, -2) x
7(+4, -2)
8(+4, -2) x
8(+4, -2)
Thickness (mm) 4.5± 10 % 5.25± 10 % 5.5± 10 %
Width (cm) 122± 5 % 122± 5 % 122± 5 %
Open area (%) 55± 10 % 48± 10 % 40± 10 %
Tensile Strength
(kN/m) [MD x CD]
6.5 ± 10% x 6±
10%
12 ± 10% x 6±
10%
14± 10% x 7±
10%
Water holding
capacity (%) on dry
weight
500± 10% 500± 10% 600± 10%
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SOME SALIENT RESEARCH FINDINGS
Percentage elongation at break of JGT is significantly lower than
that of synthetic geotextiles (maximum 15% against more than 50 % of
SGT) - (Ramaswamy & Aziz – 1989)
Substantial reduction (more than 50%) in rut depth under dynamic
load tests with JGT- (Ramaswamy & Aziz – 1989)
Loss of strength of JGT after a year is not a deterrent as, by that
time, JGT is seen to have helped in providing a self sustaining sub-
grade for most type of soils - (Ramaswamy & Aziz – 1989 )
The gain in strength of the sub-grade with time is compensated
against the loss of strength of JGT within the same time frame
(ibid & JU 2005)
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NORMATIVE REFERENCESBIS -
Guidelines for application of Jute Geo-textiles for rain water erosion control in road & railway embankments and hill slopes( IS 14986:2001)
Two guidelines on rural road construction & river bank protection with JGT ( IS 14715 Part I & II : 2016 )
Guidelines for jute sapling bag for growth of sapling in nurseries ( IS 16089 : 2013
RD&SO, Ministry of Railways –
Guideline no GE:G1 (July 2003)—
Guidelines for earthwork in railway projects, 2007
Unified Standard Schedule of Rates by Indian Railways,2011
Indian Roads Congress—
Specifications for road & bridge works (2013) & Recommended practice for treatment of embankment slope & erosion control ( IRC : 56 & IRC SP : 48
State-of-the Art Report on JGT ( SP-21) prepared jointly by CRRI , IJIRA & NJB has been published by Indian Roads Congress in November 2011
Schedule of Rates ( SoR ) –
PWD, WBSRDA & I / W – Govt. of WB, PWD – Govt. of Assam & Meghalaya and all the Railway Divisions in India
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Environmental Advantages of JGT
• During 100 days of jute growing period, 1 hectare of jute
plant can absorb about 15 MT of CO2 from atmosphere
and liberate about 11 MT of O2. Studies reveal that CO2
assimilation rate of jute is higher than trees (Inagaki,
2000; IJSG 2003).
• Main use of jute sticks (a retting output) is as fuel and
household uses. Yield of jute sticks is 2.5times the fibre
by weight. Jute sticks annually saves 5.06 million tons of
forest wood(in India and Bangladesh) and help in
preserving ecological balance.
• Jute leaves left in the field are good manures and
increase fertility of land.
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Total No. of Works Undrtaken so far with the Use of
Jute Geotextiles in India
•Erosion Control & Hill Slope Stabilization – 63
•Road Construction – 70 (excluding 61 pmgs roads in WB)
•River Bank Protection –105 ( including 53 aila works)
•Control of railway Track settlement (3+7) - 10
•Agri- Horticulture & Forestry - 23
Total – 271 +
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APPLICATIONS OF JGT IN THE INTERFACE OF
SUB-GRDAE & SUB-BASE OF ROAD
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1. Sub-grade soil to be compacted to
100% MDD achieved by Standard
Proctor.
2. Leveling of sub-grade as per specified
profile
3. A thin cushion of local sand of 25 mm
thick is to be spread over the prepared
sub-grade to facilitate better drainage
and less chances of microbial attack
on JGT
4. JGT is to be laid by unrolling, ensuring
proper drape
Installation Guidelines
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• Lateral and Longitudinal overlaps
between two JGTs should be of 100-150
mm
• Stapling of JGT with U-shaped nails (11
gauge) or suitable sharp edged material
like wooden or bamboo pegs in an
interval of about 750 mm.
Installation Guidelines
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Installation Guidelines
• After completion of JGT installation, its
condition to be visually assessed for any
construction / installation damage.
• Torn /damaged portions, if any, should be
covered up by pieces of JGT with at least
75 mm overlapping and duly stapled on
all sides.
• Further, a thin cushion of local sand of
about 25 mm thick to be spread over JGT
to prevent puncture/damage due to rolling
of the overlying sub-base
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Installation Guidelines
• Overlying layers of graded
aggregates (GSB, WBM) to be
spread and compacted to
desired MDD.
Note -
• WBM layer should be
completed before onset of
monsoon
• Movement of Heavy loaded
vehicles to be restricted during
compaction.
• Rutting if occurred, has to be
filled with proper material
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• For application in curves/super-elevations, JGT to be
folded / cut and overlapped in the direction of the
turn. Folds in JGT are generally stapled at an interval
of 300 mm in curves.
By Folding By Cut pieces
Installation Guidelines
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Economical Benefits – Conventional v/s
with JGT
Design Methodology- Conventional Design Methodology – With JGT
Conventional Rural Road
Construction follows guidelines of
IRC:SP:72-2015 specifications
Design by Experience
Based on experience gained from
lab studies and field trials over a
expanded period of time.
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23
Sl
No.Road sites State & District
Year of
constructio
n
Initial
Subgrade
CBR (%)
Using Woven JGT
CBR value (%)
1.Kakinada Port Connecting
Road A.P (Kakinada) 1997 1.61 4.7(after 30 months)
2. Munshirhat Rajput Road W.B (Howrah) 2001 3.5 6.0 (after 1year)
3. Andulia to Boiratala Road W.B (N. 24 Parganas) 2005 3.221 0.47 (after 18 months)
4. U. T. Road to Jorabari Assam (Darrang) 2006 4.0 13.45 (after 23 months)
5. Rampur Satra to Dum Dumia Assam (Nagaon) 2006 3.0 12.9 (after 24 months)
6. Chatumari to MDR-14 Oridsa (Jajpur) 2006 3.0 8.8 (after 31 months)
7.Gehlawan village to PMGSY
roadM.P (Raisen) 2007 2.0 10.6 (after 23 months)
8. Kansa to Bati W.B (Mursidabad) 2013 3.9 7.2 (after 16 months)
9.Promod Nagar to Muga
Chandra Para Tripura (West Tripura) 2013 7.0 9.51 (after 18 months)
10.V. Koracharahatti to T-10
RoadKarnataka (Davanagere) 2012 4.0 11.8 (after 16 months)
Economical Benefits : Design by Experience on enhanced CBR
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• Quantification can be explained through an example with certain assumptions as follows –
1. CBR of sub-grade soil : 4 %
2. Considering Enhancement of CBR of sub-grade soil by 1.5 times of control4% CBR : 6 %
3. Cumulative Traffic ESAL : 60,000 – 1,00,000
4. Length of Pavement : 1000 m
5. Carriageway & Roadway Width of Pavement : 3.75 m & 7.5 m
6. Width of JGT with 10% overlapping : 8.6 m
7. The rates of materials are taken from SoR, PWD, Roads & Bridges, WestBengal, August 2014.
8. The rates of riding surface (premix carpet & tack coat) not included.
9. Cross-section of pavement as per guidelines mentioned in IRC:SP:72-2007
10. Site assumed for construction of road is near Howrah and is about 20 kmfrom Dankuni station
How JGT makes road construction economical
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Cross-sectional View - With & Without JGT
Pavement constituents
ITEMS Pavement Thickness with
Conventional DesignPavement Thickness
with JGT
CBR 4%
Enhanced CBR 6% (1.5
times of 4% CBR)
WBM – III 75mm 75mm
WBM – II 75mm 75mm
GSB – III 75mm 125mm
GSB-II 100mm ---
Total 325 mm 275 mm
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Composition of Pavement Constituents
Composition of Pavement
Constituents
Materials of Pavement Constituents
GSB - II consists of 1st class brick aggregates
(40mm down) & sand (in proportion
60:40)
GSB - III consists of stone chips and sand
(2.36 mm below)
WBM - II consists of 63 – 45 mm size
WBM - III consists of 53 – 22.4 mm size with
stone screening Type B
26
N.B. The calculated savings are considered under idealized conditions of
road construction. Also the calculated savings may vary from region to
region and distance between worksite from source of materials
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Comparative Cost Analysis of Pavement Constituents ( Rs./ km)
Savings of Rs. 143812.00 /km or 4 %
from conventional method
Conventional With JGT
Layers Rate Thickness
(m)
Width
(m)
Amount
(Rs./km)
Thickness
(m)
Width
(m)
Amount
(Rs./km)
WBM (Gr. III) 2757.21 0.075 3.75 775464 0.075 3.75 775464
WBM (Gr. II) 2725.37 0.075 3.9 797171 0.075 3.9 797171
GSB – III 1456.34 0.075 4.05 442362 0.125 4.05 737270
GSB – II 1962.5 0.1 8.8 1727000
Medium Sand
above & below
JGT
896 0.05 8.6 385280
Woven JGT 105 --- 903000
Total Cost 3741997
≈ 37 lacs
3598185
≈ 36 lacs
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Case Study
• NAME OF THE PROJECT : Strengthening of road sub-grade
Kanksa to Bati, Murshidabad, WB
Pre work Condition of Road
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Properties of sub soil :
Composition : Silty clay
Moisture content : 30 %
Liquid limit : 40 – 45%
Plasticity Limit : 28%
OMC & MDD :15 % & 1.76g/cc
CBR % ( Soaked) : 3
Soil properties -
Depending upon CBR and calculated traffic volume, thickness of
pavement to be determined.
Requirement of JGT to be ascertained
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Compaction of Sub-
grade
Spreading Sand
Laying of JGTUnrolling of subsequent rolls of
JGT with overlapping
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Compaction of Sub-
base
Condition of road after 2 years
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Leveling of damaged road in
progressDamaged Road, kakinada, AP
( After Devastating Flood on 06.11.1996 )
RECONSTRUCTION OF KAKINADA PORT
APPROACH ROAD WITH JGT, AP
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Laying of Woven Jute Geotextile
on Sub-Grade
Condition of Road even after 20 years
of its construction with JGT
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NAME OF THE PROJECT:Construction of highway embankment on soft marine soil using Jute
Geotextile at Kakinadaport – A P
OBJECTIVE :Reinforcement of the highway embankment with the help of JGT by
minimizing post-construction settlement, lateral spreading of fill material etc.
PROPERTIES OF SUB SOILComposition : mainly clay up to a depth of 4 m with
occasional mixture of silt or sand
Moisture content : 70 – 80 %
Liquid limit : 60%
Plasticity Index : 28%
Bulk density : 1.3 mg/m3 – 1.45 mg /m3
Undrained shear strength : 6.0 kN/ m2
[in situ Vane shear test]
Compression index ( Cc ) : 0.225
Co-efficient of consolidation ( Cγ ) : 2.0 x10-7 m2/ sec
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PROPERTIES OF JUTE GEOTEXTILE USED –1. Weight : 750 gsm
2. Tensile strength : 20 kN / m
3. Pore size (O90) : 250 micron
4. Type of JGT : Woven (Grey)
IMPROVEMENT OF CBR VALUES OF SUB-GRADE SOIL 30 MONTHS AFTER
APPLICATION OF JGT
Natural soil( CBR % before laying JGT
Improved soil CBR % after 30 months of laying JGT
Unsoaked
specimen
Soaked
specimen
Unsoaked
specimen
Soaked
specimen
2.10 1.61 6.03 4.78
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JGT laid on the sub-grade.
Widening of Munshirhat to Rajpur Road, Howrah
Consolidation of brick metal
laid over JGT
Condition of JGT Treated Widened Road Even After Six yrs. of Application
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NAME OF THE PROJECT :
Widening and strengthening of Munshirhat –Rajpur Road, West Bengal.
OBJECTIVE :
Strengthening of the widened portion of the sub-grade on both sides of an existing district road with use of woven Jute Geo-textile.
PROPERTIES OF SUB SOILType of soil : Organic Silty Clay (OL)
Avg. Moisture content : 16.76 %
Avg. LL : 48.73 %
Avg. PL : 29.69 %
Avg. PI : 19.04
Avg. O.M.C. : 19.14 %
CBR : 3.55 %
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PROPERTIES OF JUTE GEOTEXTILE USED
1. Weight : 760 gsm
2. Tensile strength : 20 kN / m
3. Pore size (O90) : 300 micron
4. Type of JGT : Woven (Rot Resistanat)
CBR VALUES OF SUBGRADE SOIL BEFORE AND AFTER
LAYING OF JGT
Avg. soil CBR %
(before laying JGT)
Improved soil CBR %
(after laying JGT)
3.55 6.0
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ANDULIA – BOYRATALA ROAD BEFORE LAYING JGT
Compacted Sub-grade
Strengthening of Road Sub-Grade with JGT, Andulia - Bairatala, 24 Pgs ( S)
Condition of JGT treated road after 18 monthsPerformance Evaluation
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NAME OF THE PROJECT :
Construction of Andulia –Boyratala Road With
JGT under PMGSY Project in 24 pgs (North)
District, West Bengal.
OBJECTIVE :
The main objective of the project is to evaluate the extent of improvement in CBR of the sub-grade by use of Jute Geotextile in a rural road.
PROPERTIES OF SUB SOILType of soil : ORGANIC SILTY CLAY (OL)
LL : 45.20%
PL : 27.10%
PI : 18.10
O.M.C. : 23.5%
MDD : 1.72 gm/cc.
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PROPERTIES OF JUTE GEOTEXTILE USED
1. Weight : 810 GSM
2. Tensile strength : 30 kN/m
3. Pore size(O90) : 150 μ
4. Type of JGT : Woven Untreated
Soaked soil CBR (before laying JGT)
Improved soil CBR (after 18 months of laying of JGT)
3.22% 10.47% at 0.25 km 14.00% at 1.40 km
CBR VALUES OF SUBGRADE SOIL BEFORE AND AFTER LAYING OF JGT
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Construction of Rural Road with JGT at Tripura
Manufacture of JGT at
Tripura Jute Mills
Promodnagar to
Mugachandrapara Road
Laying of JGT on Road Sub-grade Condition of Road after 2 yrs.
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JGT application in progress at Bir Chandra Manir Mukh
Road to Nishikanta Murasingha Para PMGSY road, Tripura
The site and installation of JGT under progress, March,2017
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Construction of PMGSY Road with JGT at
Bider, KRRDA
Laying of JGT on
Subgrade
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Vulnerable slope of kamar to Poothari PMGSY Road
,Nandagaon, Mathura, UP
An ideal case to stabilize the slope of road embankment with the use of OW JGT -
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Application of JGT to prevent pot holes and
refection cracks, Garia Stn Road, PWD, Govt. of WB
Pre-treatment Application of JGT on surface
After treatment After 10 yrs of application
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Application of JGT to prevent pot holes / refection cracks :
Raiganj to Fatepur (Kaliaganj), SH-10A, PWD, Govt. of WB
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Direction
of laying
Jute Geotextile
Fixing nail
Graded slope
Grass plant
Toe anchor
(150 mm x 150mm)
150
Shoulder anchor
(150 mm x 150mm)
+
Impounded of 2.87 litres of water per sq.m. of 500 gsm open weave JGT on a 1:2 slope
APPLICATION OF JUTE GEOTEXTILE IN SLOPE STABILIZATION
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Destabilized Mine Spoil
heap at SahashradharaSprouting of plants after laying
of JGT.
Stabilized JGT treated mine spoil heap
and growth of vegetation.
A FEW CASE STUDIES :
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NAME OF THE PROJECT :
Application of JGT for stabilization of slope of mine-spoil in Uttarakhand.
OBJECTIVE :
Stabilisation of slope by checking the slide of soil, debris and boulders
during heavy rains and restoration of the vegetative cover destroyed
due to mining activities.
PHYSICO–CHEMICAL CHARACTERISTICS OF SOIL :
Characteristics & Unit Project Area Under JGT
1.Texture Class SL( Sandy loam )
2.Sand ( % ) 66.60
3.Silt ( % ) 19.50
4.Clay ( % ) 13.90
5. pH 08.10
6.CaCO3( % ) 68.10
7.Total Nitrogen ( %) 00.06
8. Available P2O5 ( kg /ha ) 03.78
9. Available K2O ( kg / ha ) 44.10
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OPEN WEAVE
JGT SAMPLE
500 gsm
Properties OPEN WEAVE
Weight (gm/sq.metre) 500
Threads/dm (MD x CD) 6.5 x 4.5
Thickness (mm) 5
Width (cm) 122
Open Area (%) 50
Strength (kN / metre) (MD x CD) 10 x 7.5
Water holding capacity on dry
weight (%)
500
Fabrics can be tailor-made for specific end uses
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RESULTS :
1. Vegetation Establishment
Excellent yield of 9850 Kg/ha compared to 1960 Kg/ha in control
2. Moisture Improvement
JGT helped in moisture conservation (40% - 50%)
3. Erosion Control
Reduced the monsoon run-off from 57% to 37%
Delayed and attenuated the flood peaks by 20 minutes and more than 60%
respectively
The soil erosion was reduced to 8 ton per / ha, near permissible limits within
a period of 6 years.
The structure retained a huge quantity of debris (62,000 cu m).
4. Soil Improvement
Organic carbon content increased from 0.13 % to 0.26%.
Available P2O5 increased from 5.4 kg /ha to 32 kg / ha.
CaCo3 content decreased from 55 to 34% and
pH value reduced from 8.1 to 7.7 over a period of 7 years.
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DENUDED / ERODED OF SLOPE
EMBANKMENT
SLOPE PROTECTION OF FLOOD EMBANKMENT WITH JGT, ODISHA
LAYING OF JGT
ON PREPARED SLOPE
STABILIZED SLOPE WITH
VEGETATIVE COVER
STABILIZED MINE SPOIL
WITH JGT DESTABILIZED SPOIL HEAP,
SINGRAULI, UP
LAYING OF JGT ON
PREPARED SLOPE
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LAYING OF JGT ON THE
PREPARED SLOPE
SLOPE PROTECTION OF BRIDGE APPROACH WITH JGT
MUNDESWARI, WB
STABILIZED SLOPE WITH
VEGETATIVE COVER
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STABILIZATION OF BRIDGE APPROACH WITH JGT
MELBOURNE, AUSTRALIA
LAYING OF JGT ON THE
PREPARED SLOPE
STABILIZED SLOPE WITH
VEGETATIVE COVER
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ERODED SLOPE
SLOPE STABILIZATION WITH JGT, MADHUSUDHANPUR, EASTERN RAILWAY
DRESSING OF SLOPE
LAYINF OF JGT ON
PREPARED SLOPEVEGETATIVE COVER OVER THE
STABILIZED SLOPE
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JGT FOR TREATMENT OF ZONE AT RIGHT BANK OF TEESTA RIVER AT POWER HOUSE AREA TLDP-
III,NHPC, RAMBI, WB
Laying of JGT on Prepared Slope and Vegetation Establishment
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DEBRIS SLIDING FROM TOP
OF SONAPUR SLIDELAYING JUTE GEOTEXTILE
SLOPE COVERED WITH JGT
WITH WIRE CRATES AT TOE
WIRE CRATES AT TOE SLOPE COVERD WITH
VEGETATION
HILL SLOPE STABILIZATION WITH JGT AT SONAPUR LAND SLIDE
AREA, MEGHALAYA
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DESTABILIZED SLOPE NEAR PROJECT SITE OF NTPC, KOLDAM
PROJECT, KULLU, HP
Laying of JGT on Prepared Slope and
Vegetation Establishment Thereafter
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Hill slope stabilization with
JGT at Ladakh - A BRO work
Stabilized hill slope and
formation of ice on JGT
Hill Slope Stabilization with JGT at Adverse Climatic Zone ?
Sand Dune Stabilization with JGT in Cold Desert ?
Formation of sand Dune Laying of JGT Yes, Greenery in Desert
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Slope Stabilization with JGT, Jorabani to Imphal Road , Manipur
Destabilized Slope Laying of JGT Stabilized slope
Slope Stabilization with JGT, Karimganj - Bangladesh Road, Assam
Eroded slope of
road embankmentDressing of slope
for laying JGTLaying of JGT
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Effect of JGT in hill slope stabilization, soil & nutrient loss reduction,
CSWCRTI, Ooty, Tamil Nadu
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Without JGT
With JGT
Growth of vegetation & collection of
eroded soil for different treatment plots
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TreatmentRainfall
(mm)
Runoff
(mm)
Percentage
of runoff
Soil loss
(Tonnes
/ha)
700 GSM 125.00 1.8 1.0 0.003
600 GSM 125.00 2.2 1.4 0.018
500 GSM 125.00 2.7 2.0 0.041
Control 125.00 41.4 33.0 9.427
RAINFALL, RUNOFF AND SOIL LOSS OBSERVED
FROM JANUARY TO JUNE 2014 WITH THREE
VARIETIES OF JGT
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Treatment Rainfall
(mm)
Runoff
(mm)
Percentage
of runoff
Soil loss
(Tonnes/
ha)
500 GSM
Synthetic125.0 10.0 8.0 0.2
500 GSM Non
woven125.0 7.8 6.0 0.2
500 GSM
Open Weave125.0 6.9 5.5 0.3
Control 125.0 13.4 11.0 1.7
RAINFALL, RUNOFF AND SOIL LOSS
FROM JANUARY TO JUNE 2014 IN
60 % SLOPE
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ROOT GROWTH OF GRASS UNDER
DIFFERENT TREATMENTS AND
SLOPES AFTER ONE YEAR
TreatmentsRoot depth
(cm)
Root lateral
spread (cm)
Root
weight/plan
t
Root
volume (cc)
Root mass
density
(gm/cc)
Volume of
soil bind by
the root(cc)
90 % slope
500 GSM
Synthetic31.0 26.6 5.9 35 0.15 68873
500 GSM
Non Woven
JGT
39.0 35.6 6.6 45 0.19 155200
500 GSM
Open Weave
JGT
37.0 40.3 7.7 50 0.19 188686
Control Plot 33.0 24.8 4.8 25 0.13 63730
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TreatmentsPlant height
(cm)
No of
Tillers/plant
Biomass
(t/ha)
Foliage
lateral
spread (cm)
Surface area
protected by
the grass
(cm2)
90% slope
500 GSM
Synthetic93.33 110.9 10.4 109 9331
500 GSM
Non Oven
JGT
102.33 115.6 10.5 116 10659
500 GSM
Open Weave
JGT
101.00 120.3 11.2 118 10935
Control Plot 81.33 104.6 9.2 105 8659
GRASS GROWTH CHARACTERS
UNDER DIFFERENT TREATMENT
AND SLOPES AFTER ONE YEAR
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EXPERIMENT IN SANDS OF JAISALMER,
RAJASTHAN WITH JGT
• This is a unique experiment to combat threats
of severe wind erosion in sands
• JICA is associated with project along with the
State Forest & Environment Deptt
• On the basis of observations of the foreign
experts open weave JGT (200 gsm) was
designed. The special feature of the fabric is its
thickness –at least 7.5 mm in the warp across
the direction of wind—and the pore size—10
times the maxm thickness of the fabric.
• Slides to follow reveal the results after 18
months
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APPLICATION OF JUTE GEOTEXTILE FOR SAND DUNE
STABILIZATION IN COLD DESERT, RAJASTHAN
Destabilized Sand Dune – No Growth of Vegetation
Wind Induced Sand Movement Blocks Roads and Canal
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SAND DUNE STABILIZATION WITH JUTE GEOTEXTILE
Laying of JGT Plantation of Local Species
Stabilized Sand Dune with Growth of Vegetation ( Afforestation )
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For further details pl. contact : Ph - 033 22267534, 9051395619
E mail - [email protected], Website- www.jute.com