volflo 1.5 quick guide

8/2/2019 VOLFLO 1.5 Quick Guide

1/8

GT KGEOSTRUCTURAL TOOL KIT, INC.

VOLFLO 1.5

Quick Guide


2/8

Copyright 2004

By Geostructural Tool Kit, Inc.

All rights reserved. This book or any part thereof may not bereproduced in any form without the written permission of

Geostructural Tool Kit, Inc.

Geostructural Tool Kit, Inc.2804 Longhorn Boulevard

Austin, Texas 78758

Phone : (512) 835-7206

Fax : (512) 835-1248

email : [email protected] address : www.gtksoft.com

Other Software Available

PTISlab


3/8

Page 1 of 6

VOLFLO 1.5 QUICK GUIDE

SYSTEM REQUIREMENTS

The system requirements to run VOLFLO 1.5 are:

A Pentium or higher processor (Pentium II recommended) 32 MB of RAM (64 MB Recommended) Windows 95 or higher, Windows NT 4.0 SP3 or higher 16 MB of available hard drive space SVGA monitor, 800 x 600 resolution minimum CD-ROM

INSTALLATION PROCEDURES

To install VOLFLO 1.5 follow the steps below:

1. If installing on Windows NT, 2000 or XP log in as an administrator.2. Insert CD-ROM into drive.3. From the desktop click on the Start button.4. Click on Run 5. In the Run dialog box type the command X:\VOLFLO1.5\Setup.exe whereX is the drive letter of the CD-ROM drive.6. Click the OK button.7. The setup program will begin. Follow the on screen instructions. Pleasenote that due to the necessity to update Window system files the computermay need to be rebooted during the installation process.

After installation the program will operate in demonstration mode. The demonstrationmode allows the user to preview the capabilities and functionality of the program prior topurchase. Upon purchase the user will be supplied an activation code by GeostructuralTool Kit, Inc. (GTK) that will unlock the program from demonstration mode. This activationcode is specific to the installation computer and a certain registered user name. Topurchase the software fill out the order form, which can be found on the Order VOLFLOmenu within the program. This order form can be faxed, mailed or emailed to GTK. Uponreceipt of the order form and all payments due a representative of GTK will contact theuser and supply the activation code.

LICENSE AGREEMENT

During the installation process a license agreement window will appear. The licenseshould be completely and carefully read since it is considered a legal agreement betweenGeostructural Tool Kit, Inc. and the user. The license has to be agreed to before theinstallation will continue. If the license is not agreed to the program will not install. If youhave any questions concerning the license agreement please contact Geostructural ToolKit, Inc. The license agreement is also available in Adobe AcrobatTM format located on the


4/8

Page 2 of 6

installation CDROM. Please note that the license agreement allows for installation anduse of the software on only one workstation. Additional seat licenses for the software areavailable for a nominal fee.

TECHNICAL SUPPORT

Free technical support is available for 12 months after the program shipping date. Thefree technical support is limited to problems with installation and running of the program,not engineering consulting or interpretation of the PTI manual. Application or engineeringconsultation for specific project inputs, analysis, evaluation or design issues byexperienced design engineers is available and can be provided on a fee basis.

On-site training, seminars or workshops are also available. Call for rates.

To obtain technical support please call or write Geostructural Took Kit at:

Geostructural Tool Kit, Inc.2804 Longhorn Boulevard

Austin, Texas 78758Phone : (512) 835 - 7206Fax : (512) 835 1248

e-mail : [email protected] address : www.gtksoft.com

DISCLAIMER

Some of the application logic employed in the programs will reflect the judgment of thewriters. Specific design results may differ somewhat from results other engineers wouldproduce for the same input conditions. GTK welcomes discussion of programmeddecisions and suggestions for improvements in the program.

These programs have been written for use by knowledgeable foundation or geotechnicalengineers. Their use by non-professionals always should be supervised and reviewed bya knowledgeable professional. Output results must be evaluated in light of professional

judgment.

TRADEMARK ACKNOWLEDGMENT

Windows and Windows NT are registered Trademarks of Microsoft Corporation in the U.S.and other countries.

Acrobat and Acrobat Reader are registered Trademarks of Adobe Systems, Incorporated inthe U.S. and other countries.


5/8


6/8

Page 4 of 6

Liquid Limit -

Plastic Limit

Percent Passing #200 sieve

Percent Finer 2 micron Percentage of soil smaller than 0.002 inches asdetermined by hydrometer tests.

Dry Density

Suction Compression Index for 100% fine clay (100) Change of soilvolume for a change in suction for 100% fine clay. The suction

compression index is sometimes referred to as o or the matrixsuction compression index. The suction compression index may beuser input or calculated by the method prescribed in the Post-

Tensioning Institutes Design and Construction of Post-TensionedSlabs-On-Ground3rdEditionmanual.

Ko Lateral Earth Pressure Coefficient The recommended values of Koare as follows:

Ko = 0.00 when there are many cracks in the soil.Ko = 0.33 when there are few cracks and the soils moisture is

decreasingKo = 0.67 when there are few cracks and the soils moisture is

icreasing

Ko = 1.00 when cracks are tightly closed.

Ff Fabric Factor Factor used to modify the unsaturated diffusioncoefficient for the presence of roots, layers, factures and joints. TheFabric Factor is only used in the determination of the edge moisturevariation distance (Em) by the Modified PTI procedure. Therecommended values of Ff are as follow:

Ff = 1.0 when soil layer contains few roots, layers, fractures orjoints (no more than one per vertical foot).

Ff = 1.3 when soil profiles contain some roots, layers, fractures

or joints (two to four per vertical foot).Ff = 1.4 when soil profiles contain many roots, layers, fractures

or joints (five or more per vertical foot).


7/8

Page 5 of 6

SUCTION AT EDGE OF SLAB TAB

The Suction at Edge of Slab tab is used to enter the suction profile information.The inputs are broken down in four groups: Initial Suction, Final Suction, ConstantSuction, and Barriers.

The Initial Suction and Final Suction inputs are used to select the initial and finalsuction profiles or envelopes to be used in the analysis. Following is a list of thesuction profiles or envelopes that can be selected on the drop down list:

Default Wet Design Envelope In absence of local observations, thewettest suction value at the ground surface recommended by theModified PTI procedure is 2.5 pF. This value is typical of poordrainage, excessive watering or construction after extended rains.

Default Dry Design Envelope In absence of local observations, the driest

suction value at the ground surface recommended by the ModifiedPTI procedure is 4.5 pF. This value is typical of soil with wiltedvegetation.

Tree Envelope Under driest conditions, when the tree is near the wiltingpoint, a suction of 4.5 pF should be used. Depth of root penetrationshould be determined by exploration or estimated for futureconditions.

Flower Bed Envelope Under wettest conditions, watering of a flower bedwill produce soil suction at the ground surface of 2.5 pF.

Constant Suction Profile Also known as the equilibrium profile, which isbased on the equilibrium suction at depth.

Measured Suction Profile A measured or assumed suction profile can beentered and analyzed by the program. The measured or assumed suction profile isdefined by entering a depth and a corresponding suction value. Up to ten pointsper profile may be entered. To add or delete points, right click the mouse in themeasured suction profile grid.

The Constant Suction inputs are used to input the climate controlled equilibriumsuction and the depth at which no change in suction occurs due to environmentalinfluences. The Constant Suction inputs are as follows:

Constant Suction - The constant suction may be determined bymeasurement at a depth below which the suction varies by less than 0.027 pF perfoot or estimated using the Thornthwaite Moisture Index chart found in AppendixA-3 of the PTI Manual or or other procedures found in the literature.


8/8

Page 6 of 6

Depth to Constant Suction The depth at which the suction changes lessthan 0.027 pF per foot, a water table or cemented soil exists.

The Barrier inputs can be used to modify the suction profiles due to barriers. TheBarrier inputs are as follows:

Vertical Barrier Depth The depth below the ground surface that a verticalbarrier extends. The vertical barrier can be applied to either the initial or finalsuction profiles or both by selecting the appropriate check boxes. A conservativebarrier analysis to be used for foundation design would be to apply the verticalbarrier to only the final profile.

Horizontal Barrier Length Horizontal distance that a barrier extendsaway from the edge of the slab. The horizontal barrier applies to both suctionprofiles.

SUCTION AT Em TAB

The edge moisture variation distance (Em) can be user input, determined per thePTI 2nd Edition Manual or the PTI 3rd Edition Manual.

The suction profile at Em is required to determine the horizontal distribution ofsuction under the foundation. Location of tree roots and flower bed wetting zonesnear the foundation and horizontal barriers also affect the horizontal distribution ofsuction under the foundation. The constant suction profile is the typically assumedsuction profile at Em.

REFERENCES

Lytton, R.L., Prediction of Movement of Expansive Clays, ASCE GeotechnicalSpecial Publication No. 40, Vol. 2, American Society of Civil Engineers, Reston, VA,1994.

Design and Construction of Post-Tensioned Slabs-on-Ground, 3rd Ed, Post-Tensioning Institute, Phoenix, AZ, 1996.

Meyer, K.T. "Review of Procedures for Support Parameters for Stiffened Slabs onGround on Expansive Clay, Spring 2001 Meeting, Proceedings, Texas SectionAmerican Society of Civil Engineers, Austin Texas, 119-128.

Covar, A.P. and Lytton, R.L., Estimating Soil Swelling Behavior Using SoilClassification Properties, ASCE Geotechnical Publication No. 115, AmericanSociety of Civil Engineers, Reston, VA, 2001, pages 44-63.Revised 12-07-04

volflo 1.5 quick guide

Documents