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Slope Stability - Ambolighat, Maharashtra 2014

Finished installation of the SPIDER® System did not destroy scenic values of the area

Slope Stability - Ambolighat, Maharashtra 2014

Construction site area before landslide destroyed the road

Slope Stability - Ambolighat, Maharashtra 2014

Landslide destroyed the road completely and triggered protective measures

Slope Stability - Ambolighat, Maharashtra 2014

Road cleaning after event using heavy excavator

Slope Stability - Ambolighat, Maharashtra 2014

Special drilling platform prepared for this project, which was supported through a winch & pulley system

Slope Stability - Ambolighat, Maharashtra 2014

Drilling works through SPIDER® mesh (safety reasons) in progress using special platform prepared for the project

Slope Stability - Ambolighat, Maharashtra 2014

Winch & pulley system at the top of the slope

Slope Stability - Ambolighat, Maharashtra 2014

Complete SPIDER® System after installation - view from the top on the scenic area

Slope Stability - Ambolighat, Maharashtra 2014

Complete SPIDER® System after installation - almost invisible

Slope Stability - Ambolighat, Maharashtra 2014

Another view of the finished SPIDER® System installation - with minimal visual impact

 

Year of installation

2014

Initial situation

The Akeri-Amboli-Belgaum road is an important state highway (SH 121) which connects Kolhapur to Belgaum. The project location at km 51+800 is also a tourist attraction during the monsoon season because of a famous waterfall and its scenic beauty surrounding the area.

Due to frequent rockfalls and landslides in 2010, 2011 and 2012 at this location during the monsoon season the state highway is often closed for several days which severely affects the economy and day to day life of the nearby cities like Sawantwadi, Kolhapur, Amboli, etc. During the rockfall event of 2012 boulders weighing more than 60 tons rolled down the slope and damaged the existing road completely.

The Public Works Departments (PWD), Sawantwadi who has the responsibility of maintaining the road, approached several agencies to carry out the mitigation work at the site but most of them refused citing work related dangers & difficulties.

Description

The consortium of Pioneer Foundation Engineers and Geobrugg AG was awarded the work for providing rockfall protection solutions using SPIDER® System providing active rock mass stabilization. The SPIDER® System was dimensioned using RUVOLUM® Online Tool. The contractor developed special drilling platform which was mounted through a winch and pulley system.

Approximate height of the nearly vertical slope was 95 m from the road level. The total number of 326 holes were drilled for 8 m long and with 32 mm diameter anchors were placed and fully grouted. A secondary chain link mesh was also placed below the SPIDER® S4-230 net to protect from smaller boulders.  The complete work was carried out with the help of rope access technicians. A temporary protection mesh (barrier) was installed at the bottom of the slope to protect traffic from smaller boulders which disintegrated during drilling work. The SPIDER® mesh was pretensioned to the slope surface using system spike plates which were tightened as per the specific torque using a torque wrench. 

Customer

Public Works Department, Sawantwadi

Contractor

Pioneer Foundation Engineers Pvt. Ltd., Mumbai

Protected object

Road

Corrosion protection

GEOBRUGG SUPERCOATING

Your local contact

Roger Moor
   

Roger Moor

Country Manager Ost- und Zentralschweiz, Liechtenstein

Natural Hazards
Hydraulic Engineering
Mining / Tunnels
Geobrugg AG,Aachstrasse 11,8590 Romanshorn / Switzerland Country Manager Ost- und Zentralschweiz, Liechtenstein

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René Müller
   

René Müller

Country Manager Kantone AG BE BL BS FR GE JU NE SO VD VS

Natural Hazards
Hydraulic Engineering
Mining / Tunnels
Geobrugg AG,Industriestrasse 21,5200 Brugg / Switzerland Country Manager Kantone AG BE BL BS FR GE JU NE SO VD VS

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Alexander Bittendorfer
   

Alexander Bittendorfer

Project Manager Inspection Services

Natural Hazards
Geobrugg AG,Aachstrasse 11,8590 Romanshorn / Switzerland Project Manager Inspection Services

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Isacco Toffoletto
   

Isacco Toffoletto

Ticino Country Manager

Natural Hazards
Hydraulic Engineering
Mining / Tunnels
Geobrugg AG Ticino,Stabile Cometal, via Pizzante 7,6595 Riazzino / Switzerland Ticino Country Manager

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