| 摘要 |
Submarine pipe trenching apparatus for digging a trench below submarine pipelines, wherein a pair of trench cutter assemblies are mounted for digging themselves into the ground from a substantially horizontal position alongside the pipe to an upright position below the pipe, and wherein a crawler assembly is mounted on the pipe for moving the cutter assemblies along and below the pipe when the cutter assemblies are operated for digging out the soil below the pipe. The crawler assembly is constructed so that the lateral bends and vertical undulations in the pipe are detected and means are provided for stabilizing and re-positioning the cutter assemblies as necessary to maintain them in their upright cutting position below the pipe regardless of such bends and undulations. The cutter assembly may have rotating blades or jets for the cutting action, with each cutter assembly disposed at a trailing angle to provide clearance between the bottom and each cutter assembly.
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