Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Modeling Subarea: Original Author: Bentley Technical Support Group Attention: Please see the following AutoPIPE help sections: Help > Contents> Contents Tab> 1. Reference Information> Pipe Soil This section will provide information on a. Model Discretization b. Defining Soil Points in AutoPIPE c. Soil Restraint Properties in AutoPIPE d. Calculation of Soil Restraint Properties - AutoPIPE Method e. Calculation of Soil Restraint Properties - ASCE Method f. Comparison of Soil Restraint Properties g. Soil overburden stresses application on AutoPIPE points 2. Modeling Approaches> Example systems> PIPE-SOIL Interaction: Transition Example. The purpose of the following example system is to demonstrate the procedure required to a. Calculate soil properties using AutoPIPE and ASCE method b. Verification of values with hand calculations c. Determine the location of critical piping points to be defined for the above to below ground (transition) piping system shown in the Figure below. In this example, the piping system is subjected to a temperature rise of 230°F, and an internal pressure of 100 psi. For simplicity, a single soil will be assumed to interface with the pipe over the entire length of the buried portion of the system. This online help section will provide step by step procedure of modeling soil properties in AutoPIPE. Comments, Questions, and Answers about Soil Properties, Soil Calculator, and Underground Piping: Item #1: What will be the yield displacement value for following Item #2: Would it be appropriate to design fault line crossings by applying an offset to the pipeline? Are there any other way to model this? Item #3: Cannot validate AutoPIPEs results, specifically for the Qu term (vertical up) for sand, what is causing the difference? Item #4: How to model a long undeerground pipeline with traffic loading and large radius bend? Item #5: In the Virtual Anchor Length equation (La = Co * Lm), how can the value for Co be adjusted? Item #6: How to model horizontal buried piping going under roadways / railways? Item #7: How to model vertical Air Shafts - large diameter vertical underground piping ? Item #8: Why does adding a node point on s segment with soil settlement already defined make a big difference in the results ? Item #9: Alternative of performing buried piping analysis by using DeltaT equivalent in AutoPIPE? , Bentley different publication for performing verification / validation for buried safety related piping. Should this verification / validation include the alternative of using DeltaT equivalent temperature? Is this method valid for buried piping analysis? Item #10: Using AutoPIPE to determine pipe length needed for underground design item #11: Do we have to define the soil properties after the La (i.e., in Zone 3)? See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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