【摘要】：以有限元強(qiáng)度折減法為基礎(chǔ),文章采用物理模型試驗(yàn)和數(shù)值模擬相結(jié)合的方法研究了主應(yīng)力方向?qū)ι皫r隧道穩(wěn)定性的影響規(guī)律;數(shù)值模擬采用ABAQUS軟件計(jì)算了直墻拱形隧道在不同主應(yīng)力方向下的穩(wěn)定系數(shù)和積分點(diǎn)上的塑性應(yīng)變,計(jì)算結(jié)果與模型試驗(yàn)結(jié)果吻合較好。研究結(jié)果表明:有限元強(qiáng)度折減法能夠很好地應(yīng)用于隧道的穩(wěn)定性分析;主應(yīng)力方向?qū)λ淼赖姆�(wěn)定性具有很大的影響;如果僅考慮主應(yīng)力方向這單一因素對隧道整體穩(wěn)定性的影響,當(dāng)主應(yīng)力方向與隧道斷面夾角為45°時(shí),隧道模型的整體抗壓強(qiáng)度最低,穩(wěn)定系數(shù)Fs最小,此時(shí)隧道穩(wěn)定性最差。
[Abstract]:Based on the finite element strength reduction method, the influence of the direction of principal stress on the stability of sandstone tunnel is studied by means of physical model test and numerical simulation. The stability coefficient and the plastic strain at the integral point of the straight wall arch tunnel under different principal stress directions are calculated by ABAQUS software. The calculated results are in good agreement with the model test results. The results show that the finite element strength reduction method can be applied to the stability analysis of the tunnel, and the direction of the principal stress has a great influence on the stability of the tunnel. If only the influence of the direction of principal stress on the overall stability of the tunnel is considered, when the angle between the direction of principal stress and the section of the tunnel is 45 擄, the overall compressive strength of the tunnel model is the lowest, the stability coefficient Fs is the minimum, and the stability of the tunnel is the worst.
【作者單位】： 四川大學(xué)建筑與環(huán)境學(xué)院能源工程安全與災(zāi)害力學(xué)教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金項(xiàng)目(11672194) 四川省科技計(jì)劃項(xiàng)目(2014JY0002) 油氣藏地質(zhì)及開發(fā)工程國家重點(diǎn)實(shí)驗(yàn)室資助項(xiàng)目(PLN1505)
【分類號(hào)】：U451
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本文編號(hào)：2413491