SITE SURVEY 



A. Site Survey Requirements 



- Requirements differ according to: 



Anchor type [Pile, Deadweight, Drag, Embedment] 

 Loading condition [Static, Dynamic] 

 Soil type [Sand (cohesionless) , Clay (cohesive)] 

 Mooring use [Manned, Unmanned] 



Minimum Recommended Site Survey Requirements 



Required Site Information* 



Anchor Type 

 Deadweight 



Non-Critical Mooring 



General seafloor type 

 (mud, clay, sand, 

 rock) . 



Drag Embedment Seafloor type. 



Plate Anchor 



Pile Anchor 



Seafloor type; 

 depth to rock; 

 o Use estimated 

 properties provid- 

 ed or other avail- 

 able info. 



Sediment type, 

 depth of sediment, 

 o Use estimated 

 properties provid- 

 ed or other avail- 

 able info. 



Critical Mooring 



Seafloor type, depth of sedi- 

 ment, areal variability, esti- 

 mate of soil cohesion, fric- 

 tion angle, scour potential. 



Seafloor type and strcaigth, 

 (approximate) depth to rock, 

 stratification in upper 10' 

 to 30' (depending oa soil 

 type), areal variability. 



Engineering soil data to ex- 

 pected embedment depth (soil 

 strength, sensitivity, density, 

 grain size, origin, depth to 

 rock) , additional data required 

 for dynamic analysis. 



Engineering soil prssperties to 

 full embedment deptJi 

 (soil strength, sensitivity, 

 ^rain size, origin, density), 

 soil modulus of subgrade reac- 

 tion for laterally loaded piles. 



^Geologic literature survey suggested for all situations to iselp define 

 soil type and existence of seafloor anomalies. 



