Northeast Boundary Tunnel (NEBT)| Washington, DC
The NEBT project is a component of a larger program to control combined sewer overflows (CSOs) in the District of Columbia’s waterways called the Long-Term Control Plan (LTCP). The LTCP is designed to meet the CSO control objectives of DC Water and to meet water quality standards in the District of Columbia.
The NEBT consists of a 23-ft. internal diameter (ID) tunnel spanning approximately 26,700 ft. from RFK Stadium at CSO-019 Shaft location (STA. 10+00.00) to the R Street Drop Shaft (RS-DS) at R Street NW & 6th St NW Intersection (STA. 276+98.88), in Washington, DC. The NEBT will be constructed using an earth pressure balance tunnel boring machine (EPBM).
- Empirical and Numerical Geo-Mechanical Analysis for Shafts and Near Surface Structures
- Evaluation of Seven Story (Under Construction) Building in the Vicinity of a Shaft Construction Site
- Evaluation of WMATA Aerial Structures Crossing NEBT
- Damage Level Evaluation of Building Structures in the Vicinity NEBT
- Evaluation of Prefabricated Steel Portal Lattice Frame Structure Due to Support Settlement
- Evaluation of CSX Bridge crossing NEBT
- Evaluating DDOT Bridge Structure with Full Soil Structure Interaction due to Tunneling
- Developing Wall Pressure Diagrams and Structural Element Forces under Drained/Undrained Conditions
- Damage Level Evaluation for Vitrified Brick Sewer Pipes
River Renew Tunnel Project| Alexandria, VA
This project is part of the Alexandria Renew Enterprise (AlexRenew) RiverRenew Program. The Project will capture and redirect combined sewer discharges from the existing combined sewer system to a new storage and conveyance tunnel system when the capacity of the existing sewer system is exceeded by rain events. Captured combined sewer flows will be conveyed by gravity to AlexRenew’s Water Resource Recovery Facility (WRRF) for treatment prior to discharge.
The Project includes a complex system of surface facilities, deep shafts, deep tunnels, diversion sewers, and treatment facility upgrades to divert, convey, store, pump and treat flows from combined sewer outfalls.
- Numerical Geo-Mechanical Analysis for Shafts and Near Surface Structures
- Empirical Ground Settlement Evaluation due to Tunnel Excavation
- Developed Preliminary Settlement Contours for Near Surface Structures along River Renew Tunnel
- Identify Structures and Utilities Susceptible to Significant Damage Requiring Further Investigation
Crenshaw/Lax Transit Corridor Project| Los Angeles, CA
The Crenshaw/Lax Transit Corridor Project consists of approximately 8.5 miles of metro rail from the Crenshaw Boulevard and Exposition Boulevard intersection (Metro Expo Line – Crenshaw/Expo Station)) , along Aviation Boulevard south of the Imperial Highway intersection, to the existing Metro Green Line Aviation/LAX Metro Station. The Crenshaw/LAX Transit Corridor will connect the Metro Green Line at Aviation/LAX Station with the Metro Expo Line at Crenshaw/Expo Station. The project includes elevated, at grade, and underground tracks. The underground tracks include U-shaped, cut and cover (C&C) sections, and twin tube bored tunnels. Seven stations are planned along the route including, 1 elevated station (Aviation/Century), 3 at grade stations (Florence/La Brea, Florence/West, & Crenshaw/Slauson), and 3 underground stations (Crenshaw/MLK, Crenshaw/Exposition, & Crenshaw/Vernon).
- Removal of Temporary Transit Deck at Crenshaw/Lax Transit Corridor
- Ladder Support Structure Design at Crenshaw/Lax Transit Corridor Project| Los Angeles, CA
- Aluminum Supervisor Booth Structure Adequacy Evaluation
- Cable Tray Supporting Structure Seismic Check
- Wood Formwork Design and Wood Platform Design
Westside Purple line Extension, Section 3 Stations (Independent SOE Design Review) | Los Angeles, CA
- Developed Structural Model for Temporary Transit Deck per CALTRANS Requirements
- Developed Soldier Pile Analysis and Calculations to Evaluate Adequacy of Sections and Minimum required Soldier Pile embedment
- Evaluate structural Adequacy of Walers, Struts and Connections
18’ OD Shaft with Steel Ribs and Corrugated Liner Plates (SOE Design Review) | Orlando, FL
This project involved performing independent analysis to check the structural integrity of the support of excavation (SOE) system, consisting of steel liner plates and steel ribs. The analysis was based on the geotechnical information provided in GDR.
- Assessed Addition Loads due to Adjacent Crane Operation
- Performed Detailed Geo-mechanical Analysis to Obtain Lateral Forces Applied to Liner Plates and Steel Ribs
- Analyzed the Structure Under Applicable Load Combinations