本文關(guān)鍵詞： 巖石力學(xué) 抗剪強(qiáng)度 非線性關(guān)系 剪應(yīng)力 正應(yīng)力 工程應(yīng)用　出處：《巖土力學(xué)》2014年06期 　論文類型：期刊論文

【摘要】：闡述了Hoek建議的非線性關(guān)系原理,以此提出了求取巖體抗剪強(qiáng)度的算法:考慮了巖體抗剪破壞時(shí)總體或平均水平,通過計(jì)算出不同正應(yīng)力?下對(duì)應(yīng)的剪應(yīng)力?,線性回歸確定一定應(yīng)力范圍內(nèi)線性化后的c、?值,解決了Hoek-Brown準(zhǔn)則擬合算法不能求解一定正應(yīng)力?條件下巖土的抗剪強(qiáng)度的問題。在對(duì)中緬油氣管道(國(guó)內(nèi)段)瀾滄江跨域工程邊坡巖體應(yīng)用以及進(jìn)一步對(duì)比研究,結(jié)果表明:采用文中算法給出的第1種確定正應(yīng)力?的方法所得的c、?值與Hoek-Brown準(zhǔn)則擬合算法所得的結(jié)果相差不大,究其原因是兩種算法考慮的因素不太一樣,導(dǎo)致圍壓3?或正應(yīng)力?大小有所差別;在實(shí)際工程正應(yīng)力?較低的情況下,應(yīng)采用文中算法給出的第2種確定正應(yīng)力?的方法來獲取的c、?值,這樣所得的結(jié)果才與實(shí)際情況比較接近,克服了Hoek-Brown準(zhǔn)則擬合算法對(duì)圍壓3?依賴的問題。
[Abstract]:This paper expounds the principle of nonlinear relation suggested by Hoek, and puts forward an algorithm for calculating the shear strength of rock mass. Considering the overall or average level of shear failure of rock mass, the different normal stresses are calculated. Below the corresponding shear stress? Linear regression is used to determine the linearized cu in a certain stress range. Which solves the problem that the Hoek-Brown criterion fitting algorithm can not solve a certain normal stress? Application and further comparative study on rock mass of Lancang River cross region engineering of Sino-Myanmar oil and gas pipeline (domestic section). The results show that the first kind of normal stress is determined by the proposed algorithm. The method obtained by the cu? The reason is that the factors considered by the two algorithms are not the same, resulting in the confining pressure of 3? Or normal stress? There is a difference in size; in actual engineering normal stress? In the lower case, the second type of normal stress given by the algorithm in the paper should be used to determine the normal stress. To get the cu? In this way, the result is close to the actual situation, which overcomes the Hoek-Brown criterion fitting algorithm for confining pressure 3? The question of dependence
【作者單位】： 中國(guó)科學(xué)院武漢巖土力學(xué)研究所巖土力學(xué)與工程國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【分類號(hào)】：TU452
【正文快照】： 1引言巖體抗剪強(qiáng)度是十分重要的力學(xué)參數(shù)。常通過原位試驗(yàn)法、經(jīng)驗(yàn)類比法、反演分析法等獲取。目前,大型巖體工程中,抗剪強(qiáng)度指標(biāo)的確定大多依據(jù)少量試驗(yàn)結(jié)果和經(jīng)驗(yàn)判斷綜合確定,這一過程帶有較大的主觀成分[1]。如何根據(jù)試驗(yàn)得到的、僅僅適合于試點(diǎn)的巖體力學(xué)參數(shù),獲得能代表

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