Mumbai-Ahmedabad Bullet Train Underground Section’s Geotechnical Work Begins

Sarathy Geotech & Engineering Services Pvt Ltd. through a subcontract from Afcons Infrastructure has started geotechnical soil investigation work for 20.377 km underground Package C-2 of the 508.17 km Mumbai – Ahmedabad High Speed Rail (MAHSR Bullet Train).

This exciting development comes just weeks after Afcons Infrastructure was awarded C-2’s Rs. 6397.27 crore contract by India’s National High Speed Rail Corporation Ltd. (NHSRCL) with a 1888 day (5.17 years) deadline.

An investigation along this underground section connecting chainage Km 0.773 (Bandra Kurla Complex Station) to Km 21.150 (Shilphata Ramp) was previously subcontracted in 2017 by NHSRCL. This new round of standard penetration tests (SPT) are being done to revalidate those findings to help properly design and construct the line’s twin tunnels and shafts.

Sarathy and Afcons’ engineers at one of the SPT sites in Ghansoli – Photo by Sarathy

Sarathy Geotech has deployed their state of art TMG-CSR 183 drill rig from the United States, which is a high-end multi-purpose drilling machine that offers significant advantages in terms of efficiency, safety, accuracy, and versatility in geotechnical investigations.

The quality output is consistent as the machine is built for purpose. This in-situ quality data acquisition will help designers make better judgements for optimal design foundations to save time & money.

Alignment of Package C2 in the Mumbai Metropolitan Region (MMR) connecting BKC and Shilphata – view Mumbai – Ahmedabad HSR info & route map

Afcons will construct 3 shafts at BKC Station, Vikhroli, and Sawli at approximate depths of 36m, 56m and 39m respectively to launch and retrieve 3 Mega Tunnel Boring Machines (TBMs) with a diameter of roughly 13.1 meters to bore approximately 16 kms of tunnel.

An inclined shaft of 42m at Ghansoli and tunnel portal at Shilphata will facilitate NATM tunneling works.

Soil samples collected in Ghansoli – photo by Vipin Singh Parihar

Per a couple reliable industry sources, Afcons has still not finalized the supplier for their 3 TBMs. Whenever confirmed, I’ll write a quick post – so stay tuned!

For more updates, check out the High Speed Rail section or my Home Page! Sign up for free instant email notifications on new posts over here. Like this post? Get early-access to updates and support the site over here.


written by

Global traveler who prefers mass rapid transit

3 Responses to "Mumbai-Ahmedabad Bullet Train Underground Section’s Geotechnical Work Begins"

  1. Sunil says:

    They should have included navi mumbai airport on the way, if it can go via thane. But for this mmrda/state govt should have pushed the matter.


Leave a Reply

Want to join the discussion?
Feel free to contribute!

Leave a Reply

Your email address will not be published. Required fields are marked *