Slope Stabilization on Upstream Side of Nature Trail Project at Malabar Hill in D- Ward, Mumbai

Mumbai, Maharashtra, India |  Municipal Corporation of Greater Mumbai (MCGM)

Overview

Mumbai, the bustling metropolis on the western coast of India, is not only the financial capital but also a city of diverse landscapes and contrasting terrains. Nestled within this vibrant city is the prestigious Malabar Hill, an upscale residential area and home to some of the city’s most prominent personalities. Offering a panoramic view of the Arabian Sea, Malabar Hill is renowned for its lush greenery and serene ambiance, making it a sought-after location for recreational spaces such as nature trails.

Challenge

The idyllic charm of Malabar Hill faces a significant challenge in the form of slope instability along the upstream side of a nature trail project. The site presents a geological complexity characterized by a heavily jointed rockmass with inherent weakness planes along the stratification. Particularly during the monsoon season, the area experiences intense rainfall, leading to water percolation into the joints. This influx of water generates pore water pressure, rendering the slope highly susceptible to rockfall. With an average slope angle of 70°, the risk of instability during heavy rains poses a considerable threat to the safety of the area.

Solution

The Municipal Corporation of Greater Mumbai (MCGM) has recognized the imperative for intervention in slope stabilization, and TechFab India has proposed an effective solution.

The protective measures include ETA Approved Primary Mesh i.e High Strength Rhomboidal-shaped cable panels known as TechRhombus which cater the big boulders and BIS marked Secondary Mesh i.e. TechFab Metal Mesh, constructed with double twisted hexagonal-shaped wire mesh composite with High strength longitudinal wire rope to hold the small boulders. Combination of Primary and Secondary meshes, anchored with Self Drilling Anchors at top and bottom ensure the stability of the slope.

This innovative approach not only addresses the immediate need for slope stabilization but also incorporates advanced materials and engineering techniques for a robust and enduring solution.

Project Outcome & Performance

The completed structure stands as a testament to engineering prowess and environmental sensitivity, safeguarding the natural beauty of Malabar Hill while ensuring the safety of residents and visitors enjoying the nature trail. The successful implementation of slope stabilization measures not only mitigates the risk of rockfall but also preserves the integrity of this picturesque locale, contributing to the sustainable development of Mumbai’s landscape.