This project was part of a high-end residential excavation, shoring, and logistics project. Helical tiebacks and soil nails were used to stabilize an embankment of a massive, excavated 15′-foot-deep hole.
The objective was to provide a wide range of services including analysis, design, layout, procurement, and hands-on personnel supervision in the field.
Soil conditions at the site generally consisted of approximately 12′ to 15′ of glacial till, over severely undulating ledge rock with erratic levels of decomposition throughout. The excavators opened a 15′ test pit to determine the general site arrangement. Varying soil conditions required treating the North, South, East, and West embankments individually, each with its own unique method of stabilization. The North Face employed Helical Soil Nails & Tiebacks with the full height of the wall reinforced with gunite.
Project Summary:
- Helical Pile Type: SS175
- # of Helical Piles: 64
- Location:Greenwich , CT 06831
- Installation Depth: 12-15 Feet
- Equipment Used: Skid steer, 12K drive head
- Challenge/Unique Aspect: working in an open and excavated hole, and working to meet deadlines on a project already behind schedule.
- Danbro Installer: Nelson Engineering
- Engineer/Architect: Nelson Engineering
- General Contractor: Nelson Engineering
