The Soils database contains physical and mechanical properties for various soil types. For detailed information, see Buried Pipeline Model in PASS/START-PROF.
User-defined soil data can be added starting from number 16. Soil types 01-15 are predefined by PASS/START-PROF and cannot be modified.
Soil properties used in analysis are saved in the CTP file. When opening a file containing soils not in the database, you can add them to the database. If soil properties differ between the database and the file, you can update the database, add the soil as a new type, or use the database properties instead.
To preserve custom soils when reinstalling PASS/START-PROF or upgrading to a new version:
1) Backup the SQLite3 database files and restore them after installation to the database folder (typically C:\Program Files (x86)\Common Files\STARTPR\Base). Note that newer versions may not be compatible with older database files.
2) Create a PASS/START-PROF project file containing pipes with all custom soils. After installing the new version, open this file and import the soils into the new database.
Database structure:
No. |
Name |
Description |
|
1 |
Code |
Soil type number. Types 01-15 are predefined and locked. User-defined soils start from number 16. |
|
2 |
Soil Type |
Select from: Stiff clay, soft clay, loose sand, dense sand, dense sand + road cover, loam, sandy loam, peat, or rock. |
|
3 |
Description |
Free text field for soil description. |
|
4 |
Soil Elastic Modulus, E |
Use geotechnical test data from construction site soil samples. |
1-2000 kgf/cm² |
5 |
Poisson's Ratio, ν |
0.01-0.5 |
|
6 |
Void Ratio, e |
0.2-20 or 0 e = Vv/Vs = (γs - γd)/γd = n/(1-n) Vv = volume of voids, Vs = volume of solids, γs = particle unit weight, γd = dry unit weight, n = porosity Used for flooded soil properties only. If 0, this soil cannot be used with flooded elements. |
|
7 |
Internal Friction Angle, φ |
4-60 degrees |
|
8 |
Soil Unit Weight, γ |
500-4000 kgf/m³ |
|
9 |
Soil Particle Unit Weight, γs |
500-4000 kgf/m³ or 0 Particle unit weight γs used for flooded elements to calculate buoyant unit weight: γsb = (γs - γw)/(1+e) γw = water unit weight If 0, this soil cannot be used with flooded elements. |
|
10 |
Cohesion, c |
0-1.0 kgf/cm² |
|
11 |
Bearing Capacity, Rs |
0.1-1200 kgf/cm² |
|
12 |
Longitudinal Resistance Factor, cx0 |
≥50000 kgf/m³ or 0 Soil longitudinal resistance factor derived from experimental data. If 0, elastic-plastic soil model is used. |
|
13 |
Δt |
|
|
14 |
K0 |
Coefficient of lateral earth pressure at rest (See ASCE 2001: Guidelines for Design of Buried Steel Pipe). If zero, K0 = 1 - sin φ is used. |
|
Service > Databases > Soils
1. Aynbinder A.B., Kamerstein A.G. Transmission Pipelines Stress and Buckling Analysis. Moscow, 1982
2. SP 41-105-2002. Design and Construction of Buried Heating Networks in Polyurethane Insulation Code. Moscow, 2003
(See ASCE
2001: Guidelines for Design of Buried Steel Pipe)