Construction of the Plymouth Tunnel by SEM Based on a Permanent Shotcrete Liner for The Purple Line Project in Maryland: A Case Study - RETC2021
- Organization:
- Society for Mining, Metallurgy & Exploration
- Pages:
- 12
- File Size:
- 3379 KB
- Publication Date:
- Jun 13, 2021
Abstract
The Plymouth Tunnel forms part of the 16-mile long route of the Purple Line Light Rail Project promoted by the Maryland Transit Administration. The tunnel is approximately 1,220 feet in length with a shallow vertical alignment located beneath a residential area. Challenging mixed ground conditions included surficial soils, decomposed Saprolite, and highly weathered to fresh rock requiring the use of the Sequential Excavation Method (SEM) for construction. This paper discusses innovative approaches implemented during construction as well as challenges faced during planning and installation of a spray-applied permanent concrete liner.
Citation
APA: (2021) Construction of the Plymouth Tunnel by SEM Based on a Permanent Shotcrete Liner for The Purple Line Project in Maryland: A Case Study - RETC2021
MLA: Construction of the Plymouth Tunnel by SEM Based on a Permanent Shotcrete Liner for The Purple Line Project in Maryland: A Case Study - RETC2021. Society for Mining, Metallurgy & Exploration, 2021.