3 4 



Friction Ratio (%) 



Figure 16. Correlation of 

 friction ratio, cone 

 pressure, and sediment 

 type for the four sound- 

 ings at Norton Sound. 



Port Hueneme, California 



The XSP was tested at a site offshore Port Hueneme in 

 February 1982. The purpose of the testing was to evaluate the XSP and 

 its water- jetting system in a mixed seafloor and to provide data for an 

 anchor holding capacity project. 



Six soundings were conducted with the XSP in the 40-foot mode at 

 the site offshore from Port Hueneme (Figure 13b). A detailed map of 

 the sounding locations given in LORAN-C coordinates is shown in 

 Figure 17. The NCEL Ocean Research Craft (ORC) (warping tug) was used 

 as the support vessel. The XSP was deployed using a crane and lowered 

 to the seafloor from the A-frame with a line. 



One minor problem with the XSP occurred in conducting this test. 

 The jetting sleeve malfunctioned at the beginning of the testing. 

 Side-by-side soundings (with and without jetting) were done for compari- 

 son of the effect of jetting on the cone data. Soundings 1, 3, and 4 

 were conducted with jetting at a water flow rate of about 50 gpm and a 

 pressure of 50 psi; soundings 2, 5, and 6 were done with no jetting. 

 Examples of reduced sounding data from this location are shown in 

 Figures 10 and 11. Figure 10 is sounding 2 where the water jet was not 

 used and Figure 11 is sounding 4 where the water jet was used. These 

 two soundings were separated by about 100 feet. It should be noted that 

 10 more feet of penetration was achieved when the water jet was used. 

 The data were consistent between soundings, proving the XSP is capable 

 of providing reproducible data. Stratigraphy developed from each of the 

 six soundings is shown in Figure 18. 



26 



