(pile, footing and hybrid) may be investigated. A 

 portion of the foundation system will probably be 

 precast reinforced concrete slabs. 



b. Experimental Results: The performance of the founda- 

 tions will be evaluated with respect to stability, 

 total and differential settlements, initial penetra- 

 tions, and lateral movements. The observed and pre- 

 dicted performance of the foundations will be compared 

 in order to obtain measurements of safety, and to 

 determine the adequacy of the design procedure. In 

 addition, an evaluation will be made of the scour and 

 fill effects on the various foundation configurations. 



2. Moorings and Anchors . 



a. Moorings: Explosive anchors with 10 kip and 50 kip 

 capacity and newly developed expendable vibratory 

 anchors will probably be used to moor the surface 

 support vessels utilized in SEACON and to moor any 

 oceanographic data equipment. When the primary mission 

 of these anchors is completed and their performance 

 recorded, tests will be conducted to determine their 

 pullout resistance. The results of these tests will 



be used to investigate the relationship of ultimate 

 holding power to the anchor configuration, penetration 

 depth, and sediment engineering properties. 



b. Anchors for Seafloor Structures: Vibratory anchors 

 may be emplaced to provide uplift resistance for some 

 of the buoyant SEACON structures. Various systems for 

 connecting the structures to the emplaced anchor will 

 be investigated. The performance of the anchors and 

 connecting devices will be evaluated. 



3. Turbidity Control . To suppress turbidity, a plastic over- 

 lay may be laid at the site from a submersible or tethered 

 vehicle . 



Lifting, Transporting and Positioning (WBS 3.1370) 



1. Flexible System with Constant Tension Winch . 



a. Without guidelines: A constant-tension device (to be 

 purchased in early FY70) may be used to lower or raise 

 SEACON materials and equipment as required. The ves- 

 sel motion, line force and load motion will be moni- 

 tored during emplacement and retrieval. The result 

 will serve as a basis to evaluate the winch and the 

 handling techniques. 



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