3311 GRAND AVE 2016-01-01 MF Import

� ;� � ��a� �O�lx 9HV� y � i-�+ � H� � H� yH � �� OH ��g � Y (❑i rHz HH � H C] C7 y ��M x H cn H O cn I� August 15, 1991 Mr. Bob Norling � G-0126 Page 11 ,� soils can be used to resist lateral loads. For the passive soil ,� pressure and the friction resistance to be fully effective, tha footings (or base slabs) and the on-grade slab should be poured on undisturbed subgrade or compacted structural fill, while the walls s� should be poured against undisturbed cut or backfilled with compacted structural fill. A passive soil pressure of 450 pcf (F.S. = 1.0) equivalent fluid weight and a coefficient of friction � of 0.50 (F. S. = 1.0) may be used. The walls should be designed to have a factor of safety of no less than 1.5 against sliding and ;� overturning failures. '° 8oldi�r Pile 8horiaq Nall A soldier pile shorinq wall can be used to provide temporary support for the additional cut into the hillside for the west wall, and with a concrete facing can function as a permanent wall. For this system, soldier piles spaced at 6 to 8 feet on centers are first installed behind the line of the west wall by setting steel beams in drilled holes and grouted in-place with concrete. After the soldier piles are all in-place, the additional cut can then be carried out in front of the soldier piles. Judginq from the dense and cemented nature of the soils at the site, we believe temporary is lagging between piles will not be required. Anchor studs can be welded onto the steel beams to provide connection between the ' concrete facing and the soldier piles. The concrete facing can be " shotcreted or poured in place. „ Due the poor access, a portable drill rig will have to be used for drilling the soldier pile holes. Otherwise, a berm has to be built in front of the existinq west bank to support a mobile drill rig. . �9 r} q The same lateral soil pressures recommended for Conventional Reinforced Concrete Wall in the above section should be used for Geo Consultanta Inc.