. Deep ocean cable burial concept development. Cables, Submarine; Marine engineering; Civil engineering. Input. Table 3. Power Conversion Efficiencies 0.39 Cavitation Cutting and Eigh-Pvessicpe Jetting. Both of these techniques use the principle of focusing moderate amounts of energy to achieve ultra- high energy densities to cut, fracture, or erode materials such as rock and metal. As such, they are not suitable means of excavating a trench in soft materials. High-energy density water jets achieve 100,000 to 5,000,000 psi in a jet 1/16 inch in diameter. The optimal cutting range is 20 nozzle

. Deep ocean cable burial concept development. Cables, Submarine; Marine engineering; Civil engineering. Input. Table 3. Power Conversion Efficiencies 0.39 Cavitation Cutting and Eigh-Pvessicpe Jetting. Both of these techniques use the principle of focusing moderate amounts of energy to achieve ultra- high energy densities to cut, fracture, or erode materials such as rock and metal. As such, they are not suitable means of excavating a trench in soft materials. High-energy density water jets achieve 100,000 to 5,000,000 psi in a jet 1/16 inch in diameter. The optimal cutting range is 20 nozzle

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. Deep ocean cable burial concept development. Cables, Submarine; Marine engineering; Civil engineering. Input. Table 3. Power Conversion Efficiencies 0.39 Cavitation Cutting and Eigh-Pvessicpe Jetting. Both of these techniques use the principle of focusing moderate amounts of energy to achieve ultra- high energy densities to cut, fracture, or erode materials such as rock and metal. As such, they are not suitable means of excavating a trench in soft materials. High-energy density water jets achieve 100,000 to 5,000,000 psi in a jet 1/16 inch in diameter. The optimal cutting range is 20 nozzle diameters, and the jet pressure should be at least 10 times the material strength [35]. Extrapolating this information to digging a 3-foot-deep trench in a typical (4-psi) seafloor soil suggests a nozzle size of 1-1/2 inch and jet pressure of 40 psi (minimum). Thus, it can be seen that the high-pressure water jetting technique provides nominally 2,500 times the pressure required to cut seafloor soil, and the jets are so small that only a localized area of soil would be excavated. Extra- polation of high-pressure water jet theory to soil excavation leads to standard (low-pressure) jetting techniques. Cavitation cutting results in pressures and cutting volumes similar to high-pressure water jetting. Direct Insertion. Using this method, the cable is simply forced into the soil with, for example, a heavy wheel. The wheel must be forced through the soil while penetrating 3 feet into the bottom. Preliminary analysis showed that, even if the wheel were water lubricated such that an 80% reduction in frictional resistance could be attained, the forward force required to push the wheel through the soil ranges from 4,400 pounds for a 4-inch-thick wheel to 7,900 pounds for a 16-inch-thick wheel. In addition. 15. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may no