3214 BROADWAY BROADWAY KINECT APARTMENTS 2021-08-11

• American Property Development ES-0599.06 January 22, 2015 Page 7 • Updated June 9, 2016 • • • In our opinion, where shoring is necessary, the use of a conventional cantilever or tieback • shoring system is feasible for temporary support of excavations. In our opinion, soil nailing is • also a feasible alternative for excavation shoring. For purposes of this study, we have provided recommendations for soil nailing, and recommendations for cantilever and tieback shoring. It is • important to note that if tiebacks or soil nails are utilized, appropriate easements will be required • from adjacent property owners to accommodate the tendons and nails, as appropriate. • Soil Nail Wall Recommendations • • Based on the soil conditions encountered during our fieldwork, the soil conditions are generally • favorable for soil nail walls. For design purposes, the following design parameters can be • considered for temporary soil nail walls: • • Internal Angle of Friction 38 degrees • • • Cohesion 250 psf • • Allowable Pullout 4.0 kips per foot • • • Soil Moist Unit Weight 125 pcf • • Maximum Nail Spacing 6 feet (horizontal /vertical) • • The above design parameters are intended for preliminary analysis of a soil nail wall design. • Modification of these values by the geotechnical engineer may be appropriate during the design • process, based on the results of the analyses. With respect to soil nail shotcrete facing, • temporary or permanent (foundation wall) facing can be considered as part of the top-down construction. The soil nail wall designer will need to consider shotcrete thickness and ! reinforcement requirements, as appropriate for temporary or permanent facings. = Cantilever and Single Tieback Soldier Piles • Temporary shoring should be designed to resist lateral soil pressure based on an active.earth • pressure condition. Surcharge loading from adjacent roadways or buildings should be included • in the shoring design, as appropriate. For design, the following earth pressure and surcharge • values should be used: • • • • • • • Earth Solutions NW,LLC • S.