【摘要】：隨著我國(guó)交通事業(yè)的迅速發(fā)展和城市化建設(shè)的不斷進(jìn)行,基礎(chǔ)性建設(shè)在各個(gè)領(lǐng)域得到進(jìn)一步的完善。為更多的節(jié)省地面空間,地下工程得到廣大學(xué)者的廣泛關(guān)注。作為最主要的地下工程研究對(duì)象,隧道的建設(shè)數(shù)量日益增多,因此合理的隧道支護(hù)結(jié)構(gòu)設(shè)計(jì)方法顯得至關(guān)重要。本文以可靠性指標(biāo)來評(píng)價(jià)結(jié)構(gòu)的穩(wěn)定性,并就其在隧道襯砌設(shè)計(jì)的應(yīng)用進(jìn)行了如下研究：(1)本文以連續(xù)介質(zhì)模型對(duì)隧道襯砌進(jìn)行可靠性分析,利用ABAQUS軟件建立隧道二維平面模型,應(yīng)用有限元-響應(yīng)面法進(jìn)行作用效應(yīng)分析,確定可靠性分析的功能函數(shù)。(2)在不同地震波作用下,對(duì)不同位置軟弱夾層下的隧道施工過程進(jìn)行數(shù)值模擬,得出不同工況下的襯砌內(nèi)力、位移等的分布規(guī)律。(3)針對(duì)無軟弱夾層的隧道模型,將圍巖彈性模量,抗剪強(qiáng)度,泊松比作為基本隨機(jī)變量,采用一種通用的可靠指標(biāo)迭代方法,計(jì)算不同圍巖參數(shù)下的可靠指標(biāo),并分析基本變量關(guān)于可靠指標(biāo)的敏感度。(4)針對(duì)含軟弱夾層的隧道模型,利用通用的可靠指標(biāo)計(jì)算程序,分別研究不同軟弱夾層位置下襯砌截面的可靠性變化以及軟弱夾層參數(shù)變化對(duì)襯砌可靠指標(biāo)的影響,對(duì)比分析不同工況下的計(jì)算結(jié)果。
[Abstract]:With the rapid development of China's transportation industry and the development of urbanization, the basic construction has been further improved in various fields. In order to save more surface space, underground engineering has been widely concerned by many scholars. As the main research object of underground engineering, the number of tunnel construction is increasing day by day, so the reasonable design method of tunnel support structure is very important. In this paper, the reliability index is used to evaluate the stability of the structure, and its application in tunnel lining design is studied as follows: (1) in this paper, the reliability of tunnel lining is analyzed by continuous medium model. The two-dimensional plane model of tunnel is established by using ABAQUS software, and the finite element response surface method is used to analyze the action effect, and the function of reliability analysis is determined. (2) under the action of different seismic waves, Through numerical simulation of the tunnel construction process under different positions of weak intercalation, the distribution of lining internal force and displacement is obtained under different working conditions. (3) for the tunnel model without soft intercalation, the elastic modulus and shear strength of surrounding rock are calculated. As a basic random variable, Poisson's ratio is used to calculate the reliability index under different surrounding rock parameters by using a general reliability index iteration method, and the sensitivity of the basic variable to the reliability index is analyzed. (4) for the tunnel model with weak intercalation, The reliability change of lining cross-section and the influence of soft intercalation parameters on the reliability index of lining are studied by using the general calculation program of reliability index, and the calculation results under different working conditions are compared and analyzed.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U451

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本文編號(hào)：2219860