【摘要】：我國大部分地區(qū)多為山嶺、丘陵地帶,隨著國家大力發(fā)展基礎(chǔ)交通設(shè)施,在穿山過嶺時隧道工程得以廣泛應(yīng)用。國內(nèi)外對于隧道設(shè)計施工的研究越來越多,而對于復(fù)雜地質(zhì)條件的隧道,如偏壓隧道,其研究還相對較少。對于隧道偏壓,主要以隧道襯砌結(jié)構(gòu)承受不對稱荷載作為判別標(biāo)準(zhǔn),其形成原因包括地形,地質(zhì)構(gòu)造,施工的因素。目前對于偏壓隧道的設(shè)計常常采用工程類比的方法,但各隧道工程地質(zhì)條件相對復(fù)雜,不能完全適用于類似隧道,在設(shè)計施工時難免造成人力物力的浪費。本文以鶴大高速回頭溝隧道進(jìn)口處淺埋偏壓段為研究對象,通過現(xiàn)場埋設(shè)土壓力盒獲得圍巖壓力和二襯接觸壓力的監(jiān)控數(shù)據(jù),分析二次襯砌承擔(dān)圍巖壓力的比例。采用荷載結(jié)構(gòu)法,應(yīng)用MIDAS GTS/NX建立二襯的計算模型,以監(jiān)測數(shù)據(jù)獲得的二襯承擔(dān)比例計算二襯壓力,分析選取偏壓斷面的襯砌結(jié)構(gòu)安全性。采用相同的方法,討論不同橫坡角度對二襯結(jié)構(gòu)的內(nèi)力和變形影響,根據(jù)規(guī)范的要求,判斷其安全性。在此基礎(chǔ)上,對二次襯砌厚度進(jìn)行優(yōu)化,探討不同地形坡度,不同襯砌厚度與二次襯砌結(jié)構(gòu)內(nèi)力和位移的關(guān)系,從模擬結(jié)果分析二次襯砌的優(yōu)化厚度。
[Abstract]:Most areas in China are mountains and hilly areas. With the development of basic transportation facilities, tunnel engineering has been widely used in the crossing of mountains. There are more and more researches on tunnel design and construction at home and abroad, but the research on tunnel with complex geological conditions, such as bias tunnel, is relatively less. For the bias of tunnel, the tunnel lining structure is mainly regarded as the criterion of asymmetric load, and the reasons include topography, geological structure and construction factors. At present, the method of engineering analogy is often used in the design of bias pressure tunnel, but the engineering geological conditions of each tunnel are relatively complex, which can not be fully applied to similar tunnels, and it is inevitable to cause waste of manpower and material resources in the design and construction of the tunnel. In this paper, the shallow burying partial pressure section at the entrance of Heda High Speed Huigou Tunnel is taken as the research object, and the monitoring data of surrounding rock pressure and second liner contact pressure are obtained through burying the earth pressure box on the spot, and the proportion of secondary lining bearing surrounding rock pressure is analyzed. The load structure method and MIDAS GTS/NX are used to establish the calculation model of the second liner. The pressure of the second liner is calculated according to the ratio of the two linings obtained from the monitoring data. The safety of the lining structure selected from the bias section is analyzed. The same method is used to discuss the influence of different transverse slope angles on the internal force and deformation of the two-lining structure. The safety of the structure is judged according to the requirements of the code. On this basis, the secondary lining thickness is optimized, and the relationship between the different terrain slope, the different lining thickness and the internal force and displacement of the secondary lining structure is discussed, and the optimized thickness of the secondary lining is analyzed from the simulation results.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U455.91

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