3214 BROADWAY BROADWAY KINECT APARTMENTS 2021-08-11

• American Property Development ES-0599.06 • January 22, 2015 Page 10 • Updated June 9, 2016 • • Tieback anchors should be verification tested and proof tested in general accordance with • Section 8.3 of the Recommendations for Prestressed Rock and Soil Anchors (Post-Tensioning • Institute, 1996). A minimum of two verification tests (200 percent design load) should be performed. Verification test anchors can be used as production anchors, provided the anchor is • successfully tested and is acceptable. The production anchors should be proof tested to one hundred thirty percent of the design load. The geotechnical engineer should observe the • anchor testing and provide documentation of the test results. Tieback anchors should be • locked-off at 90 percent to 100 percent of the design load. ID Shoring Wall Drainage • Temporary shoring walls should be provided with adequate drainage to reduce the potential for • excess hydrostatic pressure build-up. During construction, drainage occurring between the • timber lagging is usually sufficient to prevent the development of excessive hydrostatic pressures. Where permanent building walls will be constructed along the temporary shoring • walls, a sheet drain material should be installed along the face of the shoring wall. A typical • detail illustrating a sheet drain and permanent wall drainage system is provided on Plate 6 of • this study. • Shoring Monitoring • Due to the close proximity of adjacent buildings and public right-of-ways, an optical monitoring 4/1program should be implemented for this site. The monitoring program should consist of a video or photo survey prior to beginning the building excavations to document the current conditions • of the surrounding features. Initial survey points should be placed at strategic locations along • adjacent foundations and right-of-way alignments that will allow for periodic measurement • during and after the shoring installation. This will allow for efficient monitoring of the site to identify and remediate excessive deflections or excavation related movements, if they occur. • Prior to the start of construction, the geotechnical engineer, owner, and contractor should • review the project and develop a monitoring program for the site. • Following installation of the soldier piles (if utilized), monitoring points are typically established • on the top of the piles prior to proceeding with the excavation. An initial baseline reading • should be acquired prior to proceeding with the excavation. Readings should be acquired • relatively frequently during the excavation phase of the construction. The geotechnical • engineer should review the data as it becomes available during the course of construction. The monitoring program should be supplemented with periodic observations by the geotechnical • engineer during the excavation phase of construction. • • • • • • • Earth Solutions NW,LLCMI • •