3333 NASSAU ST 2024-08-07 - Laserfiche WebLink

• October 3, 2016 Single-Family Residence L&A Job No. 16-124 Page 17 blanket fill should be compacted to a non-yielding state with a vibratory compactor. Structural fill should be used for the remaining wall backfill. The top 18 inches of the backfill may consist of compacted, clean, sandy soils. Heavy compaction equipment should not be allowed within the walls of a horizontal distance equal to that of the wall heights. A 4-inch perforated PVC footing drain pipe, as recommended in the DRAINAGE CONIROL ROL section of this report, should be provided for the basement and retaining walls. The drain lines should be hydraulically connected to the drainage blanket behind the walls and tightlined to a storm sewer. PAVED DRIVEWAY As shown Plate 6, the residence will be accessed to its south side via an elevated driveway constructed on fill embankment between two concrete retaining walls along the edges of the driveway. The fill embankment should be constructed with structural fill per recommendations under the S IRUCTURAL FILL section in this report. Performance of driveway pavement is critically related to the conditions of the underlying subgrade soils. We recommend that the subgrade soils under the driveway be treated and prepared as described in the SITE PREPARATION AND GENERAL EARTHWORK and S 1'RUCTUAL FILL sections of this report. Prior to placing base material, the subgrade soils should be compacted to a non-yielding state with a vibratory roller compactor and proof-rolled with a piece of heavy construction equipment, such as a fully- loaded dump truck. Any areas with excessive flexing or pumping should be over excavated and re-compacted or replaced with a structural fill or crushed rock placed and LIU & ASSOCIATES, INC. f\2�