07-24-23-R - Laserfiche WebLink

Home Browse Search

City of Arden Hills Project B2204011 June 23, 2022 Page 9 a rate of 20H:1V (horizontal:vertical) or flatter. Transitions in the transverse direction, such as at intersections, should be at least 4H:1V. Table 4. Recommended Fill and Compaction Specifications* Material Material Specification Compaction Specification Subgrade fill Select Grading Material MnDOT 2106.1.A.6 MnDOT 2106.3.G.1 Below landscaped surfaces, where subsidence is not a concern Non-Structural Grading Material MnDOT 2106.1.A.8 MnDOT 2106.3.G.2 *More select soils comprised of MnDOT 3149.2.J.2 Fine Filter Aggregate may be needed to accommodate work occurring in periods of wet or freezing weather. We recommend placing engineered fill in accordance with MnDOT 2106. We recommend compacting engineered fill in accordance with the MnDOT specifications listed in Table 4. The project documents should specify relative compaction of engineered fill, based on the structure located above the engineered fill, and vertical proximity to that structure. The project documents should not allow the contractor to use frozen material as engineered fill or to place engineered fill on frozen material. Frost should not penetrate under foundations during construction. C.2.c. Pavement Subgrade Test Roll After preparing the subgrade as described above and prior to the placement of the aggregate base, we recommend test rolling the subgrade soils with a fully loaded tandem-axle truck in general accordance with MnDOT Specification 2111 (Test Rolling). We also recommend having a geotechnical representative observe the test roll. Areas that fail the test roll likely indicate soft or weak soils that will require additional correction work to support pavements. We recommend performing a second test roll after the aggregate base material is in place, and prior to placing bituminous pavement.