1999-338A - Laserfiche WebLink

Home Browse Search

C> Carter Associates, Inc. Round Island oceanside Park Improvements S.R. A -1-A December 3 1997. ATTACHMENT A (Continued) ! Groundwater 40 d The groundwater at the time the test borings were taken was sufficiently below the ground surface so that the required site preparation could be completed without any adverse effects. I-feavy rainfall and/or a high water table may occur before the earthwork commences, or during the 4W earthwork operation. When these conditions occur and the site preparation cannot be achieved as specified, an evaluation of the existing conditions should be conducted and the specifications revised accordingly. Where Vibratory Equil2ment May Affect Ad acent Structures M Where there are existing structures adjacent to the site that may be affected by the self-propelled steel q, drum vibratory equipment, densification must be performed using equipment that will satisfy the required densification without the risk of damage to the existing structure(s). Loaders and heavy plate compactors are two types of equipment that have been used successfully. [densification procedures must comply to the capability of the equipment employed. Aftemative to Self-Prop2iled Steel Drum, Vibratory Equipment .. When self-propelled steel drum vibratory equipment cannot be used as specified, vibratory plate compactors may be used. When this condition occurs, the overall densHication procedure must be revised to comply with the capability of the equipment employed. In general, small plate compactors w will be effective to a maximum depth of 6 to 8 inches. On -Site Inspection We recommend that the site preparation and subsequent earthwork be monitored by a qualified soits technician. The soils technician should be responsible to observe the clearing and compaction of the sr building and pavement areas, determine the suitability of the fill and backfill, and take representative density tests on the prepared surface, fill, backfill, and footing excavations, 'J � 5