CASE HISTORY Rev: 00, Issue Date 21.05.09

Transportation/Monorail

Product:Mactex WR 10

MMRDA FABRICATION YARD AT WADALA MUMBAI,INDIA

Photo 3. Unraveling of Geosynthetic roll

Client name:

MMRDA

Main contractor name:

L & T LTD.

Mactex WR 10 - 13,705 sq m

Construction info:

Consultant:

Products used:

Construction Start:

SOWIL LTD.

2009

ON GOING PROJECT Construction end:

Photo 2. Transportation of roll of Woven Geosynthetic

Mactex WR 10 of size 3.2m x 147m

Photo 1.Site Before Construction

Problem:

Solution:

Considering the increase in population, increased travel demand and narrow

road networks running through congested areas, there is a need of a system

which will occupy less space as well as reduce travel time.

Maccaferri Product Used:

Mactex WR 10 is used in Basal Reinforcement for strip footing which will give

strength & enhance the Bearing & load carrying capacity of existing very loose

soil.

MMRDA has proposed to construct the 20-km elevated monorail, the first such

project in India which would start at Jacob Circle in south Mumbai and termi-

nate at Chembur via Wadala. The Rs. 2,460-crore project, awarded to Larsen

and Toubro and Malaysia-based Scoomi Engineering, is to be completed in 30

months.

It is proposed to replace the existing soil with good frictional soil along with

some reinforcement to enhance its load carrying capacity. Hence approximately

800mm soil is dug out and replaced with frictional soil. A soil is placed in three

different layers Ist Layer – 300mm,IInd Layer – 250mm and IIIrd Layer – 250mm.

As part of the monorail project a casting yard is proposed to be constructed

near Wadala (W). The casting yard is expected to carry a total load of 20T

coming from the gantry. The casting yard will be constructed in stages and the

first phase of casting yard has an area of 64m X 15m. The existing soil on site

was very loose, which is unable to carry the load due to Gantry.

A layer of Woven Geotextile is placed after IST layer of frictional soil and above

that other layers of frictional fill area supposed to be placed with proper compac-

tion.

Project section drawing

Diagram 1. Basal Reinforcement Details

Photo.6,7 Geosynthetic sheets are spread with an overlap of 150mm with the adjacent sheet.

Photo.4,5 Carefully Spreading roll of Geosynthetic without any wrinkles on the prepared layer of soil.

Photo. 8,9 Geosynthetic sheet is carefully cut after laying the required length

Photo. 10,11 Subsequent to spreading of the Geosynthetic roll,next layer of frictional soil is placed over it and compacted

Other Details:

• Monorail system can achieve + 6% gradient and turning radius up to 50 m.

• Column size of footing 0.8m x 1.5m

• Length 20 km

Section No.1 = 11.28km (Jacob circle – wadala)

Section No.2 = 8.26km (wadala - chembur)

• Total Load - 20T coming from gantry.

• Casting Yard area - 64m X 15m.

Maccaferri Environmental Solutions Pvt. Ltd. 1003,10th Floor,Casablanca,Plot No.45,Sector-11,CBD Belapur,Navi Mumbai-400614

Tel. 91-22– 27580475/27565451/ 27565906/27580931/ 27580932 - Fax (022) 27580488

Web site: www.maccaferri-india.com

Photo.12 Geosynthetic Covered with Existing soil layer

Monorail Photo.13 Geosynthetic sheet

Present Status of the Project The Project is on going.