本文選題：強(qiáng)度儲(chǔ)備　切入點(diǎn)：應(yīng)變軟化　出處：《巖土力學(xué)》2016年04期 　論文類(lèi)型：期刊論文

【摘要】：邊坡的失穩(wěn)過(guò)程是一個(gè)漸進(jìn)性的累積破壞過(guò)程。在破壞過(guò)程中抗剪強(qiáng)度參數(shù)黏聚力c、內(nèi)摩擦角?的發(fā)揮程度是不同的,對(duì)應(yīng)的安全儲(chǔ)備也就不同,那么基于強(qiáng)度儲(chǔ)備的雙安全系數(shù)確定及其基于雙安全系數(shù)的邊坡穩(wěn)定性評(píng)價(jià)就值得深入探討。首先從巖土材料的軟化規(guī)律出發(fā),在強(qiáng)度參數(shù)服從線(xiàn)性分布假定的基礎(chǔ)上,推導(dǎo)了黏聚力折減系數(shù)和內(nèi)摩擦角折減系數(shù)之間的數(shù)學(xué)關(guān)系;其次將此數(shù)學(xué)表達(dá)式引入到傳統(tǒng)的Bishop條分法中,提出了非等比例雙安全系數(shù)Bishop條分法;然后以強(qiáng)度參數(shù)對(duì)抗滑力的貢獻(xiàn)為權(quán)重,提出了綜合安全系數(shù)來(lái)評(píng)價(jià)邊坡的穩(wěn)定性;此方法不僅克服了傳統(tǒng)雙安全系數(shù)法確定雙安全系數(shù)的盲目性,而且為雙安全系數(shù)法應(yīng)用于工程實(shí)踐提供了新途徑;最后結(jié)合算例通過(guò)與傳統(tǒng)方法的計(jì)算結(jié)果進(jìn)行對(duì)比分析,驗(yàn)證了該方法的合理性。
[Abstract]:The failure process of slope is a gradual cumulative failure process. The level of exertion is different, and the corresponding safety reserve is also different. Therefore, the determination of double safety factor based on strength reserve and the evaluation of slope stability based on double safety factor are worth further discussion. Firstly, based on the softening law of geotechnical materials and the assumption of linear distribution of strength parameters, The mathematical relationship between cohesive force reduction coefficient and internal friction angle reduction coefficient is derived. Secondly, this mathematical expression is introduced into the traditional Bishop strip method, and a non-equal proportion double safety factor Bishop slice method is proposed. Then taking the contribution of strength parameter against sliding force as the weight, a comprehensive safety factor is put forward to evaluate the slope stability, which not only overcomes the blindness of the traditional double safety factor method to determine the double safety factor. It also provides a new way for the double safety factor method to be applied in engineering practice. Finally, the rationality of the method is verified by comparing the calculation results with those of the traditional method.
【作者單位】： 西安理工大學(xué)巖土工程研究所;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;
【基金】：陜西省科技統(tǒng)籌創(chuàng)新工程重點(diǎn)實(shí)驗(yàn)室項(xiàng)目(No.2014SZS15-Z01) 水利部公益性行業(yè)科研專(zhuān)項(xiàng)基金資助項(xiàng)目(No.201501034-04) 高等學(xué)校博士學(xué)科點(diǎn)專(zhuān)項(xiàng)科研基金項(xiàng)目(No.20126118110014)~~
【分類(lèi)號(hào)】：TU43
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本文編號(hào)：1562592