本文選題：巖石力學(xué) + 弱面　； 參考：《巖石力學(xué)與工程學(xué)報(bào)》2017年S2期

【摘要】：弱面巖石通常具有明顯的強(qiáng)度各向異性,一般的弱面理論都是在平面應(yīng)力狀態(tài)內(nèi)分析巖石強(qiáng)度,不能準(zhǔn)確分析所有的弱面情況。借助張量的坐標(biāo)轉(zhuǎn)換方法,計(jì)算空間任意方位上的弱面應(yīng)力分量,建立考慮三向應(yīng)力的弱面巖石剪切強(qiáng)度模型。分析結(jié)果表明,對于單弱面巖石,中間主應(yīng)力對巖石強(qiáng)度的影響是非常大的。當(dāng)(中間主應(yīng)力)σ_2≠σ_3(最小主應(yīng)力)時(shí),弱面巖石的強(qiáng)度受剪切破裂面法向與最大主應(yīng)力之間的夾角β和弱面傾向α同時(shí)控制,巖石強(qiáng)度隨b的變化規(guī)律與傳統(tǒng)模型預(yù)測的規(guī)律相差較大。α較大的情況下巖石表觀強(qiáng)度通常會比較高。α較小的情況下,σ_2較小時(shí)巖石表觀強(qiáng)度變大,σ_2較大時(shí)巖石表觀強(qiáng)度變小。使用考慮三向應(yīng)力的強(qiáng)度模型可以精確預(yù)測弱面在任意一角度時(shí)的巖石強(qiáng)度。
[Abstract]:The weak surface rock usually has obvious strength anisotropy. The general weak plane theory is to analyze the rock strength in the plane stress state, and can not accurately analyze all the weak plane conditions. With the help of Zhang Liang's coordinate transformation method, the shear strength model of rock on weak plane is established by calculating the stress component of weak plane on any azimuth of space. The results show that the effect of intermediate principal stress on rock strength is very large for single weak surface rock. When (intermediate principal stress) 蟽 _ 2 鈮，

本文編號：2012478