Harvard University Science Complex, MWRA Sewer

Highlights of SGH’s work to assess pipeline response to construction-induced vibration and movement include the following:

• Examined the sequences of both Boston blue clay excavation and installation and tensioning of a tie-back system
• Used ABACUS Explicit to develop three-dimensional soil-structure interaction models
• Analyzed stress-wave propagation through the soil
• Assessed the extent of ground displacement
• Modeled construction of the slurry wall adjacent to the pipe using nonlinear finite-element soil-structure interaction analysis
• Used different nonlinear soil models, such as Mohr-Coulomb in ABAQUS, to simulate the soil layers, buried and above-grade structures, and construction processes
• Collaborated with the owner, contractor, and other consultants, enabling Harvard to proceed with the project without endangering the pipeline

To minimize impact, the design of the four-building research complex wraps around the pipeline.