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Longitudinal single rock to the structural model of visco-elastic plastic plate bending crack stability analysis


2MPa,[link widoczny dla zalogowanych], the average thickness of about 231,311, the maximum slope length one is 5001311. P sub (level: in the breeze ~ weathered section of the majority of weak weathering. 7 = 2.722.78x104N /,[link widoczny dla zalogowanych], E: 1.5 ~ 3.4GPa,: 0.240.35, its bottom surface (bedding extruded surface) tg values ≥ 0.30.C = 00.2MPa, the average thickness of ≥ 66m (including I3 【layer), remove the P \calculated: 1) P} I3 ¨; 2) P} (and brick (house operator; 3) P} (a single operator,[link widoczny dla zalogowanych], without regard to the overlying P {00) of the constraints. results in Table 1, in the calculation indicators are all taking the worst value of the bending stability, this check. Table 1, Table Tab.1Result0fcurved bending stability checking the results of a duh Ibnilyehcela.g. 0Plt coffee from the checking results, in the most adverse conditions, the non-linear elastic range and consider the viscoelastic, viscoplastic case Sui. creep bending instability problems do not exist in the body. Moreover, the results of paper with the above formula the formula Qing Yang relatively similar results, a difference of less than 10 %, while the Sun Guangzhong, Kutte, Saukat & aoff formula, the calculation of slope length than the limit results of this paper is 20% to 80%, the specific comparison in Table 2. Table 2L checking the results of comparison Tab.2c (mU \aleaa ~. D coffee cries 0fL checking the thickness of the layer is to calculate the total thickness of strata, the results indicate that the rock in the most unfavorable geometry, physical and mechanical parameters, the slope will not produce bending unstable failure, and In fact the thickness of rock slope than the single rock formation thickness is small, inverse is now the critical failure of the thinnest layer thickness of rock d: 1) C = 0, by q and L values deduced: dcr (2 2) C ≠ 0, then (5.6) a Pi (sinn eleven d + bitter c = o (Au) (29) can be selected on behalf of the Newton and the Aitken method. are checking in 5 kinds of situations formation in vivo creep d ... checking results in Table 3. A ∞ 3 Zhiwei. etc.: Longitudinal single rock to the structural model of visco-elastic plastic plate bending crack stability analysis 25 Table 3d. checking the results of comparison Tab.3m spider 0fd stylesheet eolllpllta ~ oll0fd. in accordance with the theoretical formula of P \, and the sandstone itself, there are many single-layer thickness of less than 7.9m, so completely has the possibility of bending instability. and only the surface of the ground and checking the formula was consistent with the assumptions, because the underlying strata bound by the overlying strata , the formula derived in this paper does not consider this constraint. 4 Conclusion In this paper, single-layer structure model sheet crack rock in the non-linear elastic limit of the range of slope length derived ? calculating formula, the viscoelastic, viscoplastic within the scope of formula was revised and applied to the dam site Jinping I Hydropower three beaches line the right bank of the Stability of Creep. Calculation results agree well with the practical engineering,[link widoczny dla zalogowanych], reflecting the proposed limits of the assumptions and derived slope length relatively more reasonable formula has some practical value. It should be noted that the paper did not consider the tectonic stress and the degree of fragmentation of fractured rock of the fault. References: [1] Sun Guangzhong rock structural mechanics [M]. Beijing : Science Press, 1988. [2] Qin Si-Qing,[link widoczny dla zalogowanych], Zhang Zhuo-yuan, Wang Shi-tian, HUANG Run was. non-linear elastic engineering geology guide [M], Chengdu: Southwest Jiaotong University Press, 1993. 12 [3] Yang Qing layered rock collapse of high slope instability of the body of Qu [D], Chengdu: 'all University, 1990. [4] Soukatclm ~ V,, MathieE.PaqueC [YRenforoementetcontroledepaxeale ~ lsdamlinemirecielouvertdecharbon [A]. Seventhc0Il0ftheInternationalS ~ cieb-forRcr. ~ kMe.chanics (1I) [C] 1991 [5] KutteHK, see to Le L, eds. Rock Mechanics [M] Li Shiping translated Beijing: Coal Industry Press. 1981.83 ~ 95 [6] Zhou Weiyuan. Advanced Rock Mechanics [M]. Beijing: Water Resources and Hydropower Publishing Du .1989 (Editor Qiong)

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