common ground 07 common ground 07

common ground 07

Common Ground Proceedings 10th Australia New Zealand Conference on Geomechanics Brisbane

      

                                                                   ψ                                                    ′′                                                                                                                                      674

Slope and Stability Walls

                                                                            ′                                               ′                                          ψ  ψ = e − es               ψ                           ψ         ′ ′ 

Ip =

p′  ′ pcr

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

 ′′       ′ ψ                     ψ 

ψ m = ψ 1 − 1 I eo  p

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

                                                 Slope and Stability Walls

675

common ground 07

Common Ground Proceedings 10th Australia New Zealand Conference on Geomechanics Brisbane

common ground 07

Common Ground Proceedings 10th Australia New Zealand Conference on Geomechanics Brisbane

               

eg =

e+ 1−

fc   fc

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

                    ′                                                 

ec =

e + (1 − b) f c  1 − (1 − b) f c

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

         r  − n( f c )n     k . r. f c           b = 1− e

 

   f   thre 

                         ′                                                  ′                           676

Slope and Stability Walls

                                                                                                           100

Sand + 0% Fines Sand + 10% Fines Sand + 15% Fines Sand + 20% Fines Sand + 30% Fines 100% Fines

Submerged Internal LVDT

Internal Load Cell

60

Computer 40

Sa mp le

Percentage Finer, %

80

External LVDT

20

Valve

Pressure Transducer

0

DPVC Cell 1

   



0.1

 

  

0.01

Particle Size, mm





  

0.001



 



DPVC Pore







 

                   ′                  ′ ′                      0.7

 p'   ec = 0.91 − 0.025 ×   pa 

 

















                  Slope and Stability Walls

677

common ground 07

Common Ground Proceedings 10th Australia New Zealand Conference on Geomechanics Brisbane

1.000

Equivalent granular void ratio,ec

1.000

Void ratio, e

0.800

FC=0% FC=10% FC=15%

0.600

FC=20% FC=30%

0.400 10

100

1000

     



FC=0% FC=10% FC=15%

0.600

FC=20% FC=30%

10000

Mean effective confining stress, p ' (kPa)

  

0.800

0.400

1

  





10

100

1000

10000

Mean effective confining stress, p ' (kPa)





  

1











 

              ψ            ψ * = ec − ecs      ψ  

ψ *m = ψ * 1 − 1 I ec   p



















                



1200

1200

T-21, 0% fines T-08, 15% fines T-22, 20% fines T-23, 30% fines

800 T-21,

ψ∗=0.001 ψ∗m=0.0001 T-08, ψ∗=0.060 ψ∗m=0.058 T-20, ψ∗=0.046 ψ∗m=0.042 T-23, ψ∗=0.070 ψ∗m=0.057

400

T-36, 0% fines T-31, 15% fines T-14, 20% fines T-09, 30% fines

Deviatoric Stress, q (kPa)

Deviatoric Stress, q (kPa)

common ground 07

Common Ground Proceedings 10th Australia New Zealand Conference on Geomechanics Brisbane

800 ψ∗= −0.009 ψ∗m= −0.002 -0.055 -0.049 400 0.070 0.058 0.055 0.049

0

0 0

200

400

600

800

1000

Effective Confining Stress, p′ (kPa)

   

  





 

  





 



0

200

400

600

800

Effective Confining Stress, p′ (kPa)









1000



     ′   ′  ′′

                  ψψ               ψ  ψ                 ψ  ψ 678

Slope and Stability Walls

 ψ ψ                               

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

                  •  ′  •                •                

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                                                                                                                       Slope and Stability Walls

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common ground 07

Common Ground Proceedings 10th Australia New Zealand Conference on Geomechanics Brisbane