Modeling Vegetation (and other) Effects using VOLFLO Software

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PTI adopted adopted the principles of unsaturated soil mechanics to model the complex interaction between the slab-on-ground foundation <strong>and</strong> the supporting expansive soil. The soil / structure interaction models are defined by e m <strong>and</strong> y m values. 14
Center Lift designation may be misleading. Edge Drop may be more appropriate. 15
Page 1: June 10, 2009 - Houston, TX
Page 4 and 5: Percent Volume Change Per Element S
Page 6 and 7: Suction Compression Index corrected
Page 8 and 9: A suction change from dry (higher s
Page 11: Consolidation Theory Shrink / Swell
Page 17 and 18: PTI PTI’s s Differential Soil Mov
Page 19 and 20: y m is (and always has been) develo
Page 21 and 22: ym, in very simple l terms, is a fu
Page 23 and 24: Initial Suction Profile Measured Su
Page 27 and 28: Post-Equilibrium Suction Envelope -
Page 29 and 30: Shrink Case - Both envelopes start
Page 31 and 32: When to use Post-Equilibrium Envelo
Page 33 and 34: The magnitude of shrink and swell i
Page 35 and 36: 1.1 pF + 0.4 pF = 1.5 pF (Total Suc
Page 38 and 39: To model special non-climate contro
Page 40 and 41: Since the tree is removed JUST BEFO
Page 43 and 44: After the tree has been removed the
Page 45 and 46: The magnitude of swell is a functio
Page 47 and 48: 3 large trees reportedly removed wi
Page 49 and 50: Reduuction of Suction S Chaange 100
Page 51 and 52: Time = 0 Time = 1 Year 51
Page 53: Time between tree removal and found
Page 56 and 57: Due to climate influences alone aft
Page 58: Shrinking Swelling 58
Page 61 and 62: …. it would be the final suction
Page 63 and 64: Note: This is used primarily for an
Page 66 and 67:
Excessive watering of a flowerbed c
Page 68 and 69:
For post-equilibrium post equilibri
Page 71 and 72:
A vertical moisture barrier will li
Page 73 and 74:
Suction profile for climate control
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Modeling Vegetation (and other) Effects using VOLFLO Software

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