5900 36TH AVE W 2025-01-06 - Laserfiche WebLink

5 TESC Sheet D-1.3 shows Vault #3/#5 in close proximity behind the walls and appears to prevent installation of the geogrid reinforcement. The design in this area should be reviewed and revised as needed. 6 Rockery Wall Sheet W2 shows rockery sections for both cut and fill conditions. It does not appear that the latter is used in this project and should be removed. 7 The cut section indicates a maximum height of 16 feet, which seems excessive except for heavily consolidated undisturbed soils with high levels of internal cohesion (i.e., self-supporting soils). The drawings should specify soil types that should be present at the site to allow the construction of this wall. The soils should be present over the entire height of the wall. The drawing should include a note requiring verification of the soil through special inspections by the geotechnical engineer -of - record. 8 The cut section indicates a maximum height of 16 feet. However, the elevations for the soil nail construction drawings indicate retained heights that may exceed 16 feet. In addition, it is not clear if the soil nail wall extends below grade or is entirely above it, which may add another foot for the required rockery embedment depth. The rockery design should be reviewed and the extent reduced as needed. 9 TESC Sheet D-1.3 shows a "Storm Chamber System #1" directly in front of the rockery. The design and depth of this system is not clear. It is anticipated to extend at least several below grade. It is not clear that this system has the capacity to support surcharge loads from the rockery foundation bearing loads, which would require the rockery to be extended deeper into the soil and further increase the over - height walls. This condition should be reviewed and the wall design revised as needed. 10 Soil Nail Wall The soil nail walls are flanked by rockery walls at each end. See "Rockery Wall" Comment 3 above. The soil nail walls may need to be extended. Page 3 of 4