2522 RUCKER AVE 2018-01-01 MF Import

( Geotxhnical Engincering RepoR ' Gardener Group Condominiums ( July 16, 1997 NCA File No.209297 Page 8 � compacteble condition is not feasible. All compaction should be accomplished by equipment of a type I and size su�cient to attain the desired degra of compaction. Care should be taken when applying compaction erer� so that there is not damege to adjacent shucturos. Our experience is that large � compaction equipment mey not structurally damage adjacent structures, but they can cause cosmetic cracking or at the least, annoyance to adjacent structures. We recomme�id that photographs of adjacent sWcturea be taken prior to construction to document eny existing cracks. The use of small hand foperated compaction equipment should be wnsidered. ( ExcavaHon ConsideraHons Genenl: The excavation as planned will place the adjacent structures at risk. 7'he amount of risk � depends on the type of soils at foundation depth. [f the foundations are close to or on unweathered till the risk would be less that if severel feet of loose fill exists behveen the till and the foundation. The � minimal risk solution would be to use a soldier pile wall along that poRion of the excevation where the adjacent structures exist. Altemative solutions would be to use an ecology block shoring wall and/or excavation slopes and some underpinning of the adjacent structures. � The ecology block solution requires that a temporary oversteepened excavation be made and the blocks placed immediately following the excavation. One way to evaluate this is to excavate the site with ( _ setbacks from the property line. The behavior of the soils exposed could be evaluated prior to excavating near the property line. If it appears successful,slot excavations on the order of]0 fat in lenglh could�: ( made and the wall constructed in sections. If the soils ravel and slough excessively,the soldier pile wall could be installed. In any event, if the slot cuts are used,the owner should be prepated to fix any repairs Ldue to settlement of the adjacent structures. This is We even if the less risky soldier pile wall is constructed. ( The ecology block wall should be designed as a gravity wall. The temporary shoring walls should be designed using the parameters outlined in the retaining wall section of this report. Building surcharges � should be used when designing the wall systems. � Building Foundations Conventional spread or continuous foundations should bear on the mediwn dense to very dense glaciel I till, or structural fill extending to these soils. We expect that the till will be exposed in the building ; Iexcavation on most of the site. The medium dense weathered till is expected to be encountered about 2 'i to 3 feet bclow grade on the western portion of the site. We have assumed a minimum depth of burial ( ( NELSON-COUYRETTE ek ASSOGATES, ING