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Dam bedrock of the macro-shear strength

The critical point of service or the probability P of not less than the yield P = 0.53 shear strength of rock used by the macro argument is partial safety. First, large-scale partial safely feature unit V rock elastic stress field of small-scale homogenization; after the most dangerous section of macro rock aV d small scale shear strength (r) = F (r) + C (r) The transfer of shear to be less than rr lOAJI (a (r) dr shear strength on all the o3A r (,) in turn is greater than the small-scale unit to undertake rock features, you can have mass points in the yield probability of V When the P control equation (6) where (r) for small-scale rock mass shear strength r (r): F (r) + C (,) the one-dimensional probability density,[link widoczny dla zalogowanych], F (r), C ( r) are small-scale rock V coefficient of friction, cohesion with the airport;,, rft,) each V is a small-scale rock mass elastic stress field homogenization, one of the small-scale cross-section is elastic, the shear stress and shear strength of small scale, that is, the V of each section is on a small scale elasticity, shear stress, respectively, as, generation equations (6) obtained in the corresponding style after the first, and then equation (6) right hand side of the second type request l (r) dr: max cross section; rely on, and also separately on the same cross-section macro is, shear stress. When the unit is in the overall macro-rock characteristics of the critical state yield or not, equation (6) should satisfy the critical condition of the second type P Therefore, if the rock mass particularly in mind the macro-shear strength. . May be by (6) the establishment of macro-shear strength of rock mass equation for the f song IlJ ~ f (-r) (r) dr = I (r A (r) dr'uf. (7) Figure 3 is the literature 5 Based on laboratory specimens measured 449 depicts the shear strength of the statistical distribution curve, from which we can see that small-scale shear strength was normal. so we may assume that small-scale rock mass shear strength parameters of F (r), C ( r), respectively, normal distribution, ie F (,) ~ N (f,}), C (r )~(;,), of which were small-scale friction coefficient, the mean bond strength, 2,[link widoczny dla zalogowanych],, coefficient of friction were small-scale, cohesive force of the variance. so almost-__ under section one hundred eleven of Lai Guowei, etc.】: dam bedrock of the macroscopic rate of shear strength, (r): F 【,) + c (r) is also a normal distribution, and) = a) c8】 Side by laying Seoul - Coulomb criterion expression. Get the lower limit of the corresponding macro-shear strength parameters,[link widoczny dla zalogowanych], cT easy engineering application in Figure 3 the statistics of small-scale distributed shear strength in the =+;,=++ 2ao; ojfl, for the small-scale rock mass friction coefficient and A Brighter Summer Day Results The correlation coefficient of force. According to equation (4) and (5), there is P> 0.5. On the other hand,[link widoczny dla zalogowanych], p is clearly no more than 1, ie P <1. So. Using P: 0.5 and ¨ = 1. Combined with equation ( Cool

. To the equation (7) In particular, macro-shear strength of rock obtained, the lower r ... r respectively = + c (9) Tcrd = + a 1 + and Si (10), revolves around small-scale friction coefficient and Results capability is not relevant, or only a negligible correlation time. So that p = 0, from equation (10) can be factory a T / ~ rll = plus + c a} + 【I1j by (9) ~ (11) is not difficult to see that rock on the macro-shear strength, lower in value and small-scale arithmetic mean shear strength of rock mass, the small value of the average of the same. Where r is numerically lower with the press to ensure the rate is also 78.7% by taking the small-scale rock mass shear strength are equal. Where small-scale rock mass on the friction coefficient and the mean force, revolves Results (_,, c) and variance () is calculated, see [6] Figure 4,5 is the application of this macro-derived shear strength of rock upper and lower theoretical formula in the calculation of the Ertan project results. Map symbol \lower limit of the linear approximation value. Figure shows the calculation results in the request, within the range of applications in engineering, rock mass shear strength of the lower limit of the macro can be nearly Figure 4 cl rock Ⅱ Ertan Ertan Figure 5 a 2 c 4 Conclusion In this paper, a rock different from the past The new way - with the airport and the percolation method of combining critical theory, from small-scale mechanical properties can reflect the spatial variability with the airport, through the rock mass occurs in the case of large-scale critical analysis of the overall yield from theoretically derived rock with limited small-scale shear specimen test results to determine the shear strength of macro-rock dam, the lower formula. The results show that the rock dam on the macro-shear strength values between the small-scale rock mass shear
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