MIT - Owner
Suffolk - Construction Manager
This site on Vassar Street in Cambridge is bisected by a rail line creating engineering and logistical challenges. The portion of the structure on the farside of the rail was designed to be supported by (36) 9 ⅝” micropiles 140’ deep. Excavation access alongside the rails required a rigid SOE system which Hub designed utilizing (48) 11 ⅞” micropiles and lagging. Twenty three-foot diameter and 25 five-foot diameter shafts support the main building. A 100-foot layer of soft, silty clay necessitated careful excavation of deep shafts. In order to facilitate micropile spoil removal we provided a spoil separation system to reduce the impact of the substantial clay layer.
- Liebherr 895 220 ton crawler service crane equipped with 180’ of boom.
- Liebherr LB 45 drill rig
- Soilmec SR-75 drill rig
- Casagrande C-9 micropile drill rig
- Magni Rotating Telehandler RTH5.265
- Derrick hyperpool and centrifuge system for micropile spoil maintenance