Regional Connector Transit Corridor Project

The Regional Connector Transit Corridor is an underground light rail link that goes through the downtown Los Angeles and connects the Metro Gold Line to the Metro Blue Line and future Expo Line via Flower Street and 2nd Street. The project consists of approximately 1.9 miles of cut-and-cover and 21-foot diameter twin bored tunnels, three underground stations, a sequential excavation method cavern (60 feet wide, 38 feet high, and 300 feet long), and U-section guideway. The project has been successfully completed and opened to public in June 2023.

VNTU Inc. is serving as a subconsultant to the Connector Partnership Joint Venture (CPJV), led by AECOM and WSP, to support LA Metro to review all the design and construction submittals of this complex subway project. Mr. Vu is serving as the lead structural and geotechnical reviewer to review design of bored tunnels, cut-and-cover tunnels, underground stations, SEM cavern, crosspassages, support of excavation, permeation and compensation grouting for building protection, building underpinning, and geotechnical reports submitted by the design-builder during the final design phase. During the bidding and preliminary engineering phases (while he was working at AECOM and Jacobs Associates), he worked on updating geotechnical baseline report and support of excavation drawings; prepared the building and adjacent structure protection report; conducted field visits to evaluate and document existing conditions of critical structures along bored tunnel sections; performed analyses to assess potential impacts of the bored tunnels to the adjacent buildings and utilities; and developed mitigation plan and instrumentation drawings.