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阐述了Hoek建议的非线性关系原理,以此提出了求取岩体抗剪强度的算法:考虑了岩体抗剪破坏时总体或平均水平,通过计算出不同正应力?下对应的剪应力?,线性回归确定一定应力范围内线性化后的c、?值,解决了Hoek-Brown准则拟合算法不能求解一定正应力?条件下岩土的抗剪强度的问题。在对中缅油气管道(国内段)澜沧江跨域工程边坡岩体应用以及进一步对比研究,结果表明:采用文中算法给出的第1种确定正应力?的方法所得的c、?值与Hoek-Brown准则拟合算法所得的结果相差不大,究其原因是两种算法考虑的因素不太一样,导致围压3?或正应力?大小有所差别;在实际工程正应力?较低的情况下,应采用文中算法给出的第2种确定正应力?的方法来获取的c、?值,这样所得的结果才与实际情况比较接近,克服了Hoek-Brown准则拟合算法对围压3?依赖的问题。
The principle of nonlinear relationship proposed by Hoek is expounded, and an algorithm for calculating the shear strength of rock mass is proposed. Considering the overall or average level of shear failure of rock mass, the shear stress corresponding to different normal stresses is calculated. , Linear regression to determine the value of the linearized c,? Within a certain stress range, to solve the Hoek-Brown criterion fitting algorithm can not solve a certain normal stress? Rock and soil shear strength problems. The application and further comparison of the Lancang River cross-border slope rock mass in the Sino-Burmese oil and gas pipelines (domestic section) show that using the first method to determine the normal stress given in the paper, the values of c, -Brown criterion fitting algorithm is not much difference between the results, the reason is that the two algorithms consider the factors are not the same, resulting in confining pressure 3? Or positive stress? The size of the difference; in the actual project is lower? Case, we should use the second method to determine the normal stress given by the algorithm to obtain the value of c ,?, so the result is close to the actual situation, to overcome the Hoek-Brown criterion fitting algorithm on the confining pressure 3? Dependency issues.