The High Speed Rail Authority is working to provide America’s first high-speed rail line (HSR), ultimately in hopes of connecting all major cities across the U.S. Segments of this line are being constructed in sections, and California’s first section will expand from Los Angeles to San Francisco, allowing commuters another faster means of transportation. Group Delta, with client Jacobs, has been performing geotechnical analysis work on three sections of this project, consisting of approximately 65 miles of HSR through Central Valley California. The HSR must be grade separated from all roadways, and therefore this design effort includes more than 40 grade separations. The HSR crosses several major floodways/zones including Kings River Complex (Cole Slough, Dutch John Cut, Kings River, and Riverside Ditch), Cross Creek, Tule River, and Deer Creek. Significant drainage improvements are necessary at these rivers/creeks. The HSR also crosses irrigation canals of varying size occur along the alignment. Because of these conditions, Group Delta has needed to analyze and give reports on issues such as high groundwater, liquefaction, flow failure and slip stability. Due to the unique nature of the project, Group Delta has needed to perform this work thoroughly and strategically, and ultimately give specialized reports and construct specific designs to ultimately meet the critical velocity requirements for this train, which is proposed to meet speeds of up to 240 mph.
Location: Central Valley, California
Client: Jacobs Engineering Group, Inc.