發(fā)布時(shí)間：2019-03-02 14:20

【摘要】：在隧道開(kāi)挖與支護(hù)過(guò)程的數(shù)值分析中,確定隧道開(kāi)挖應(yīng)力釋放率是比較困難的一個(gè)問(wèn)題。本文通過(guò)數(shù)值模擬方法,分析了圍巖等級(jí)、開(kāi)挖形狀、開(kāi)挖尺寸、隧道埋深以及側(cè)壓力系數(shù)等5個(gè)因素對(duì)隧道開(kāi)挖應(yīng)力釋放率的影響程度。結(jié)果表明:影響開(kāi)挖應(yīng)力釋放率的主要因素為圍巖等級(jí),并得到不同等級(jí)圍巖隧道開(kāi)挖應(yīng)力釋放率取值范圍;其余4個(gè)因素對(duì)開(kāi)挖應(yīng)力釋放率影響相對(duì)較小,為次要因素。因此,在數(shù)值模擬隧道開(kāi)挖時(shí),可以主要依據(jù)圍巖等級(jí)來(lái)確定隧道開(kāi)挖應(yīng)力釋放率。
[Abstract]:In the numerical analysis of tunnel excavation and support process, it is difficult to determine the stress release rate of tunnel excavation. In this paper, the influence degree of surrounding rock grade, excavation shape, excavation size, tunnel buried depth and lateral pressure coefficient on the stress release rate of tunnel excavation is analyzed by numerical simulation method. The results show that the main factor influencing the excavation stress release rate is the surrounding rock grade, and the range of the excavation stress release rate of different grade surrounding rock tunnel is obtained, and the other four factors have relatively little influence on the excavation stress release rate, which is the secondary factor. Therefore, in the numerical simulation of tunnel excavation, the stress release rate of tunnel excavation can be determined mainly according to the grade of surrounding rock.
【作者單位】： 上海交通大學(xué)船舶海洋與建筑工程學(xué)院;
【分類(lèi)號(hào)】：U455

【參考文獻(xiàn)】

相關(guān)期刊論文 前8條

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本文編號(hào)：2433127