Case Studies

Statue of Unity, Gujarat

L&T Construction, Buildings & Factories
Gujarat

The Statue of Unity, the dream project of the honourable Prime Minister of India, is a colossal statue of ‘The Iron Man of India’, Sardar Vallabhbhai Patel. It is the world's tallest statue with a height of 182 metres and is located on a river island facing the Sardar Sarovar Dam on the river Narmada in Kevadiya colony, Gujarat.

Techfab India Industries Ltd is proud to participate in the making of history – as a Technology Provider and Supplier of Techgrid Geogrid & TechFab Metal Gabion Mattress for the project. The statue was inaugurated by honourable Prime Minister of India on 31 st October 2018, the 143 rd anniversary of Vallabhbhai Patel's birth.

TECH GRID GEOGRIDS & TECHFAB METAL GABION MATTRESS FOR REINFORCED SOIL WALLS AND SLOPE PROTECTION AT STATUE OF UNITY

Keywords

    TechFab Gabion Metal Mattress 10x12, 2.7mm/3.7mm wire ø, Zinc+PVC Coated
    TechGrid Biaxial Geogrid High Strength Biaxial Geogrid
    TechGrid Uniaxial Geogrid Various Grads of Uniaxial Geogrid
    TechGeo PR Series Nonwoven Polypropylene Geotextile

Introduction

AREAS OF APLLICATION

A. Slope Protection Works
B. Ground Improvement Works
C. Reinforced Soil Wall Works

Statue of Unity.

Problem Description

Memorial and Visitors Centre (M&VC Area) is located on nearest river bank side. The ‘platform’ for M&VC structures and other amenities including large land scape works was created on top of river bank with the help of gentle and stable slope from the river bed level.

The level of M&VC base / platform was kept above HFL. The ramp may come in submerged condition when the water is discharged from dam. Hence, it is susceptible to erosion at large scale considering the proximity of the dam and the discharge caring capacity of the river.

In order to protect the ramp, slope protection works consisting of TechFab Metal Gabion Mattress along with Techgeo Nonwoven Geotextile were proposed and adopted.

TechFab Metal Gabion Mattress, (10x12, 2.7mm/3.7mm wire ø, Zinc+PVC Coated) of 1.0m thickness were used on the ramp having slope 1:2 with few intermediate berms.

Techgeo nonwoven geotextile are manufactured from high quality polypropylene staple fibres for durability. It is used for separation, filtration & drainage function below TechFab Metal Gabion Mattress.

Project specific construction methodology was prepared and submitted in addition to detailed drawings for the proper execution and performance of the system.

Solution Proposed

The Memorial and Visitors Centre and other structures are to be built on reinforced soil walls all around the area. The reinforced soil walls were positions mostly over ‘filled up’ space created along with stable ramp. Hence, ground improvement was warranted.

The ramp was created by compacting the soil in number of layers to ensure proper stiffness of the sloped area. Although, to minimise settlement, layers of Techgrid geogrid are considered as subgrade stabilization.

Ground improvement in the form of three layers of Techgrid Biaxial Geogrid was proposed. TechGrid Biaxial series comprise biaxial geogrids manufactured from select grades of high tenacity, high molecular weight, and low carboxyl end group polyester yarn to ensure high strength, low creep and excellent durability.

The three layers were laid with 500mm vertical spacing between each layer and were extended 3.0 m and 5.0 m in front and back respectively beyond the design reinforcement length of the reinforcement soil walls to be built over the area.

Execution On Site

The foundation level decided for M&VC buildings were around 8.0m higher than the ramp top level. Hence, Reinforced Soil walls of required heights were proposed and adopted for the upliftment of the entire area to the desire level. Reinforced soil walls with Techgrid geogrid & panel facing was adopted due to its obvious technical and commercial advantages over any other system.

Client had proposed specialy customised size panels for the project due to aesthetic requirements. TechFab India had designed the panels and provided drawings for the same, matching client’s unique requirement.

Various grades of TGU were used as reinforcement as per design carried out for various locations and various loading conditions. TechGrid U series are uniaxial knitted polyester geogrids with a protective polymeric coating engineered for demanding soil reinforcement applications. TechGrids are manufactured from select grades of high tenacity polyester yarn with molecular weight > 25,000 and carboxyl end groups < 30, to ensure high strength, low creep and excellent durability.

For RS Wall applications too, project specific construction manual was prepared and submitted.

Related Products

TechFab Metal Gabion