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Soil friction HDD in Ple4Win v4.4.2
06-08-2017, 07:40 PM, (This post was last modified: 06-08-2017, 07:43 PM by shaswin.)
Soil friction HDD in Ple4Win v4.4.2
According to the changelogs and manual a zero friction is taken into account with 8 mm longitudinal displacement:

Change Logs:

A zero friction is the case when there is a hot pipeline, see C. NEN 3650-1:2012. But when you normal gas pipelines or low temperature pipelines friction is allow with a HHD, see C. and C.4.5.6 NEN 3650-1:2012 in the operation phase of the pipeline. It is too conservative too allow only zero friction in HDD by default. Let the user make the choice if the user want to apply zero friction.

In D-Geo Pipeline an avarege longitudinal displacement of 7.5 mm is used, see screenshot from D-Geo Pipeline manual below:
However Ple4Win uses 8 mm for the longitudinal displacement. I think it is averaged between 6 and 10 mm for soft clay, see C.4.5.1 NEN 3650-1:2012. Why not use 7.5 mm like in the manual of D-Geo Pipeline where this is based on an average of estimated values.

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Soil friction HDD in Ple4Win v4.4.2 - by shaswin - 06-08-2017, 07:40 PM

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