Soil mechanics - Chapter 19 pot

... Arnold Verruijt, Soil Mechanics : 19. SECULAR EFFECT 116 Terzaghi and Keverling Buisman to ε = −[ 1 C p + 1 C s log( t t 0 )] log( σ σ 1 ). (19. 3) The coefficients C p and C s should ... ln( t t 0 ), (19. 4) where the function H(x) represents Heaviside’s step function, H(x) =  0 if x < 0, 1 if x > 0. (19. 5) This means that the second term of the formula (19. 4) applies only ... i...

Ngày tải lên: 05/08/2014, 23:24

... at small stress. The branch of soil mechanics studying these relations is critical state soil mechanics. It may be interesting to mention that during cyclic loads soils usually tend to contract ... normal force can only be a compres- sive force. Tension can not be transmitted, unless the soil particles are glued together. Such soils do exist (e.g. calcareous soils near the coast of...

Ngày tải lên: 05/08/2014, 23:24

... 0. 13.3 A non-linear material In the previous chapter it has been argued that soils are non-linear and non-elastic. Furthermore, soils are often not isotropic, because during the formation of soil deposits ... Verruijt, Soil Mechanics : 13. TANGENT-MODULI 82 ε zz = − 1 E [σ zz − ν(σ xx + σ y y )]. The minus sign has again been introduced to account for the sign convention for the stre...

Ngày tải lên: 05/08/2014, 23:24

... semi-logarithmic paper on the basis of the common logarithm. The formula then is ε = − 1 C 10 log( σ σ 1 ). (14.5) Typ e of soil C C 10 sand 5 0-5 00 2 0-2 00 silt 2 5-1 25 1 0-5 0 clay 1 0-1 00 4-4 0 peat ... be determined for a particular soil, in the lab oratory. The circumstance that there are two forms of the formula, with a factor 2.3 between the Arnold Verruijt, Soil...

Ngày tải lên: 05/08/2014, 23:24

... TO N:Z=K/N:P=0:C =-1 :J=0 180 J=J+1:C=-C:JJ=2*J-1:JT=JJ*JJ*PP*TT 190 P=P+(A*C/JJ)*COS(JJ*PI*Z/2)*EXP(-JT) 200 IF JT<20 THEN GOTO 180 210 PRINT " z/h = ";Z;" - p/po = ";P 220 ... consolidation problem is given. In soil mechanics this solution was first given by Terzaghi, in 192 3. In mathematics the solution had been known since the beginning of the 19th centu...

Ngày tải lên: 05/08/2014, 23:24

... Arnold Verruijt, Soil Mechanics : 22. SHEAR TEST 133 Norway a variant of this apparatus has been developed, with a ... horizontal stress and the vertical stress can both be measured accurately. It may be mentioned that in soil mechanics practice laboratory tests can sometimes be considered as scale tests of the behavior ... stresses and the incremental stresses are taken equal to thos...

Ngày tải lên: 06/08/2014, 01:20

... Verruijt, Soil Mechanics : 32. LATERAL STRESSES IN SOILS 177 It may be mentioned that for historical re asons the coefficient K is denoted as a coefficient of earth pressure, in agreement with most soil mechanics ... stress path, in the same graph, and in the same point. Chapter 32 LATERAL STRESSES IN SOILS In the previous chapters some elastic solutions of soil mechanics problems h...

Ngày tải lên: 06/08/2014, 01:20

... equations of equilibrium in x- and z-direction now are Q − T sin θ − N cosθ = 0, (34.14) W −N sin θ + T cos θ = 0. (34.15) Arnold Verruijt, Soil Mechanics : 34. COULOMB 193 After elimination of T ... Arnold Verruijt, Soil Mechanics : 34. COULOMB 192 away from the soil. During that deformation the lateral force will decrease. Eventually ... and numerical methods have been develope...

Ngày tải lên: 06/08/2014, 01:20

... Z>1 THEN F=F-KP*(Z-1) 270 Q=-KA*Z*Z/2:IF Z>A THEN Q=Q+T 280 IF Z>1 THEN Q=Q+KP*(Z-1)*(Z-1)/2 290 M=-KA*Z*Z*Z/6:IF Z>A THEN M=M+T*(Z-A) 300 IF Z>1 THEN M=M+KP*(Z-1)*(Z-1)*(Z-1)/6 310 ... TRZ=TRZ+G*DZ:PR=PR+W*DZ:SRZ=TRZ-PR:SRX=CA*SRZ:TRX=SRX+PR 260 F(I)=TRX-TLX:FF=(F(I)+F(I-1))*DZ2:Q(I)=Q(I-1)-FF 270 M(I)=M(I-1)+(Q(I)+Q(I-1))*DZ2:MT=MT+FF*(Z-DA-DZ2):NEXT I 280 WHILE MT>0:N=N+1...

Ngày tải lên: 06/08/2014, 01:20

... C=8*(KSA/KSP)*(1+D)^5/(20*(1+D)^ 2-1 5*D-12*D*D) 180 IF C<0 THEN PRINT "No solution":END 190 C=C^(1/3):E=ABS(C-D):D=C:IF E>0.000001 THEN 170 200 PRINT USING A$;"d/h = ";D 210 T=(KSA*(1+D)^3-KSP*D^3)/(6*(1+D)) 220 ... applies to saturated soil, with the groundwater level coinciding with the soil surface. Derive a similar equation for homogeneous dry soil. Then...

Ngày tải lên: 06/08/2014, 01:20