CASE HISTORY Rev: 00, Issue Date 21.05.09 MMRDA FABRICATION YARD AT WADALA , Transportation/Monorail Product:Mactex WR 10 Problem:

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.

MMRDA has proposed to construct the 20-km elevated monorail, the first such project in India which would start at Jacob Circle in and termi- nate at 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.

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 Photo 1.Site Before Construction 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.

Solution:

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.

ST A layer of Woven Geotextile is placed after I layer of frictional soil and above that other layers of frictional fill area supposed to be placed with proper compac- tion.

Photo 2. Transportation of roll of Woven Geosynthetic Maccaferri Product Used: Mactex WR 10 of size 3.2m x 147m 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.

Client name: MMRDA Main contractor name: L & T LTD. Consultant: SOWIL LTD. Products used: Mactex WR 10 - 13,705 sq m Construction info: Construction Start: 2009 Construction end: ON GOING PROJECT Photo 3. Unraveling of Geosynthetic roll Photo.4,5 Carefully Spreading roll of Geosynthetic without any wrinkles on the prepared layer of soil.

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

Project section drawing Diagram 1. Basal Reinforcement Details 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.

Photo.12 Geosynthetic Covered with Existing soil layer

Photo.13Monorail Geosynthetic sheet

Present Status of the Project The Project is on going.

Maccaferri Environmental Solutions Pvt. Ltd. 1003,10th Floor,Casablanca,Plot No.45,Sector-11,CBD Belapur,-400614 Tel. 91-22– 27580475/27565451/ 27565906/27580931/ 27580932 - Fax (022) 27580488 Web site: www.maccaferri-india.com