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+--- Thread: Spelling typos in the manual and a calculation error in the Soil Model Wizard (/thread-760.html)
Spelling typos in the manual and a calculation error in the Soil Model Wizard - shaswin - 13-09-2025
There are a few spelling typos in the manual and a calculation error in the Soil Model Wizard. Change "then" into "than" with the letter "a". See the red boxes below.
https://help.ple4win.nl/index.html?h200532.htm
https://help.ple4win.nl/index.html?toggle.htm
https://help.ple4win.nl/index.html?top-soil_reaction_rvt.htm
The sentence "A large depth is defined as a height of soil coverage on top of the pipeline greater then 8.6 times the outer diameter of the pipeline." is not correct. It is not given in the NEN 3650-1 Dutch code and the fixed value 8.6 x DOUT is not always true (approximate range between 5 x DOUT and 10 x DOUT depending on the variable soil parameters (see also NEN 3650-1:2020 article C.4.2.4.3 "Bij grotere dekkingen (H > 5 à 10 x de leidingmiddellijn) geeft de methode van Marston hierdoor geen goede benadering meer van de passieve grondbelasting.")). It is better to change the sentence in "A large depth is defined, when Qp is greater than P'max.". So, the lowest value: MIN.VALUE(Qp,P'max) should be used for RVT to be exact. The calculation in the Soil Model Wizard in Ple4Win needs to be changed regarding to this calculation condition!
https://help.ple4win.nl/index.html?number_of_figures.htm
For the purple boxes a dot is mssing at the end and for the orange boxes the colon ":"-symbol is missing.
RE: Spelling typos in the manual and a calculation error in the Soil Model Wizard - B Bharatadjaya MSc - 16-09-2025
Hey Shaswin,
Typos have been fixed and will appear in the next online help update.
Regarding the Soil Model Wizard, your feedback above will be discussed internally within the Ple team and has been reported in our issue tracker.
Thanks and regards,
Billy
RE: Spelling typos in the manual and a calculation error in the Soil Model Wizard - shaswin - 23-12-2025
Has the RVT feedback from the topic above have been discussed internally, because the RVT sentence in the manual v4.9.0 hasn’t been changed.
RE: Spelling typos in the manual and a calculation error in the Soil Model Wizard - Dr. J Foerster - 07-01-2026
RVT calculations in version 4.9.0 have not been changed in respect to version 4.8.1.
We will look into this issue once the new release of the NEN 3650 norm is available.
RE: Spelling typos in the manual and a calculation error in the Soil Model Wizard - shaswin - 07-03-2026
(07-01-2026, 09:18 AM)Dr. J Foerster Wrote: RVT calculations in version 4.9.0 have not been changed in respect to version 4.8.1.
We will look into this issue once the new release of the NEN 3650 norm is available.
Jens/Billy,
To adjust in Soil Model Wizard - part 1:
For your information, this is not an issue for the new norm and will not change in the new norm. The suggested RVT calculations is valid for all old NEN 3650 norms as well.
The new norm is planned in end Q2/begin Q3 of year 2026. So if the next PLE release is before that date, you don't have to wait to implement this when the norm is released.
To adjust in Soil Model Wizard - part 2:
One thing will (possibly) change regarding to the PLE soil module in the upcoming NEN 3650-1:2026. The practical (average) value for soilparameter UF for HDD drillings will be now given in the new code. Currently PLE uses UF = 8 mm for HDD drillings. The NEN request was to give it a value between 6 and 9 mm (according to Deltares in manual D-Geo Pipeline for bentonite-sand mixture), so the avarage value for UF for HDD's in PLE needs to be changed to 7.5 mm. This should be checked/confirmed when the code is released.
To adjust in Soil Model Wizard - part 3:
In an other PLE forum post an another PLE soil module request has been mentioned, which hasn't been implemented yet and is currently been submitted as under internal PLE discussion.
To adjust in Soil Model Wizard - part 4:
The correction factors for the geotechnical design soilparameter RH (horizontal bearing capacity) in the 'Soil Model Wizard' of PLE needs to be adjusted and removed in the PLE sources and manual, see this PLE forum post, because these correction factors have been removed from the Draft NEN 3650-1:2025.
RE: Spelling typos in the manual and a calculation error in the Soil Model Wizard - B Bharatadjaya MSc - 15-03-2026
Thanks Shaswin,
Your additional information has been added to our issue tracker system.
RE: Spelling typos in the manual and a calculation error in the Soil Model Wizard - B Bharatadjaya MSc - 06-04-2026
Hi Shaswin,
The calculation of RVT in PLE is always performed using both the Marston method and the cavity expansion theory formula for deep-buried pipelines. The smaller of the two results is adopted as the governing RVT value, so no changes are required in this respect.
However, the text in the Help file regarding the factor 8.6 was significantly outdated and has now been updated.
RE: Spelling typos in the manual and a calculation error in the Soil Model Wizard - shaswin - 21-04-2026
I have seen the text in the manual for the reduced RVT, which was updated on 6th of April 2026. Thank you for updating the text.
Now it is clear for the reader
. By the way, I never use fixed number values in my science or in my VB.NET programming. It can raise questions, because 8.6 is mostly not an exact value, but mostly rounded and a well-guess. In different pipe-soil configurations the value varies between 5 to 10.