Microtunneling Bradshaw Company Maryland TUNNELING SPECIALISTS SINCE 1963      
tbm tunneling TBM TUNNELING Conventional Supports Pipe Jacking
 

       SORT BY                 PROJECT NUMBER      |      LOCATION    

  497 - International Paper Company Effluent Pipeline

PROJECT TYPE
SUB TYPE
LOCATION
OWNER
GEOLOGY
DIMENSIONS
TBM Tunneling Conventional Cantonment, FL International Paper Soft Ground 1150' x 75" Ø
SUMMARY: Bradshaw Construction installed 1,150' of 75' O.D. Rib and Board Tunnel, as well as 48" DIP Carrier pipe to be utilized as an effluent pipeline. Bradshaw Construction worked through severe weather conditions which caused shaft movement and water intrusion. In addition, the work was completed within a residential zone. Bradshaw worked closely with the General Contractor and local residents... Complete Project Profile

  478 - National Center Sanitary Sewer Project

PROJECT TYPE
SUB TYPE
LOCATION
OWNER
GEOLOGY
DIMENSIONS
TBM Tunneling Conventional Crystal City, VA Arlington County Soft Ground, Mixed Face 1,890'x 68" Ø
SUMMARY: The NCSS project highlights Bradshaw Construction's ability to redesign projects to increase efficiency, decrease costs, and streamline logistics. The NCSS project was initially designed as a pilot tube MTBM job. However, this would have involved the installation of 8 shafts in the middle of Jefferson Davis Highway - a major artery into and out of DC. We redesigned the project as a rib-and-board... Complete Project Profile

  477 - Abingdon WTP Expansion

PROJECT TYPE
SUB TYPE
LOCATION
OWNER
GEOLOGY
DIMENSIONS
TBM Tunneling Conventional Abingdon, MD Harford County Public Works Soft Ground 372' x 114" Ø
SUMMARY: Bradshaw Construction successfully completed a TBM Tunnel using an Akkerman Digger Shield and 114"Ø Rib & Board Supports under Interstate 95 for the Abingdon Waste Water Treatment Plant. With the key goal of minimizing potential settlement of I-95, the tunnel size was reduced from a plan diameter of 144" to 114". However, the size reduction increased the challenge of installing the Ductile Iron... Complete Project Profile

  468 - Flint River Transmission Main - Phase 2

PROJECT TYPE
SUB TYPE
LOCATION
OWNER
GEOLOGY
DIMENSIONS
TBM Tunneling Conventional Atlanta, GA www.cleanwateratlanta.org Silty Sand with areas of Partially Weathered Rock 1,040' x 72" Ø
SUMMARY: The Flint River Transmission Main project was constructed using conventional TBM tunneling in the Hapeville neighborhood of south Atlanta, GA beneath Old Dixie Highway and an active Norfolk Southern railroad. The single 1,040' tunnel consisted of three separate curves. The first two were per plan, while the third was a 650' radius curve added during the tunnel excavation process to avoid a... Complete Project Profile

  457 - Battery Park Trunk Sewer Tunnel

PROJECT TYPE
SUB TYPE
LOCATION
OWNER
GEOLOGY
DIMENSIONS
TBM Tunneling Conventional Richmond, VA City of Richmond Soft Ground 3,400' x 144" Ø
SUMMARY: When Tropical Storm Ernesto hit the City of Richmond, VA on August 31st, 2006 it caused the roof of an existing combined storm sewer to collapse severely restricting the flow and flooding of Battery Park with raw sewage. This emergency project was constructed by Bradshaw to bypass the damaged sewer. It consisted of a 3,400' main truck line tunnel was excavated using a 144" diameter excavator... Complete Project Profile

  430 - Deep River Outfall Sewer

PROJECT TYPE
SUB TYPE
LOCATION
OWNER
GEOLOGY
DIMENSIONS
TBM Tunneling Conventional High Point, NC City of High Point Rock 1,400'x82-96" Ø
SUMMARY: This project involved the utilization of two tunneling methods: hand mine drill & blast, and a TBM capable of mining through hard rock conditions. For the most part the 1,000' TBM run was self-supporting, but some of the weaker zones required rock bolts, roof channels, and even liner-plates for a short reach. Two drill and blast road crossings totaling 400' were completed on this job. Both drill... Complete Project Profile

  418 - Elizabethtown Tunnel

PROJECT TYPE
SUB TYPE
LOCATION
OWNER
GEOLOGY
DIMENSIONS
TBM Tunneling Conventional South Bound Brook, NJ Elizabethtown Water Co. Rock 1,245' x 101" Ø
SUMMARY: The Elizabethtown project highlights Bradshaw's ability to quickly adapt to major problems in an efficient, expedient manner. A special head was fabricated specifically for this project, based upon the unique conditions indicated by the boring logs. However, the head proved ineffective. Our fabrication department modified the head, and anticipated production rates returned to the expected amount... Complete Project Profile



 

Equipment    •     Employees    •   Links    •    Site Map
  175 West Liberty Road Eldersburg, Maryland 21784 • Phone: (410) 970-8300 • Fax: (410) 970-8340