本文選題：三維地質(zhì)模型 + 隧道��； 參考：《重慶交通大學(xué)》2014年碩士論文

【摘要】：近年來隨著交通行業(yè)的飛速發(fā)展，從而出現(xiàn)了更多的高速公路隧道，高速鐵路隧道與城市交通隧道，而現(xiàn)代隧道的特點(diǎn)是斷面大，里程長，并且由于里程長的原因，還不得不布置在不良地質(zhì)構(gòu)造當(dāng)中，如果不引起重視，在施工過程中擾動這些不良地質(zhì)體會引起非常大的次生災(zāi)害，不但影響了施工，造成隧道洞身的破壞，而且還產(chǎn)生了次生地質(zhì)災(zāi)害，造成經(jīng)濟(jì)損失人員傷亡的同時(shí)還破壞了自然環(huán)境。本人在搜集重慶軌道交通一號線中梁山隧道資料的基礎(chǔ)上，借助三維有限元軟件Midas/GTS建立了三維地質(zhì)模型，對隧道穿越背斜構(gòu)造的情況下進(jìn)行了模擬分析。 1）利用三維有限元軟件Midas/GTS等比建立了歌樂山三維地質(zhì)模型，建立了觀音峽背斜地質(zhì)構(gòu)造幾何模型，模擬了歌樂山在自重應(yīng)力條件下的初始地應(yīng)力狀態(tài)，并分析了歌樂山觀音峽背斜剖面初始地應(yīng)力特征、不同地表地形處的山體地應(yīng)力特征。 2）重慶軌道交通一號線中梁山隧道穿越了觀音峽背斜，在歌樂山三維地質(zhì)模型的基礎(chǔ)上，模擬了中梁山隧道開挖，在關(guān)鍵區(qū)域，，如穿越背斜的核部、翼部等地質(zhì)構(gòu)造敏感部位就隧道洞身的變形量大小、山體的位移場分布趨勢、山體的應(yīng)力場的重分布情況做出了總結(jié)；以及隧道開挖對山體擾動區(qū)域、對山體的損傷區(qū)域、以及隧道開挖引起的地表變形等方面做出了結(jié)果分析，得出了相關(guān)規(guī)律。 3）在歌樂山三維地質(zhì)模型的基礎(chǔ)上，對其施加不同地質(zhì)構(gòu)造與不同巖性繼續(xù)模擬隧道開挖，目的是去除地質(zhì)條件和不同巖性兩個參考變量之間的相互干擾，在同一地質(zhì)構(gòu)造中考察不同巖性的影響，以及在同一巖性中考察不同地質(zhì)構(gòu)造的影響。對分析結(jié)果進(jìn)行橫向量化對比分析，在不同地質(zhì)構(gòu)造情況下，比較洞身變形最大區(qū)域分布特征、主應(yīng)力集中最大分布帶、剪應(yīng)力集中分布帶，塑性區(qū)分布區(qū)域以及山體地表變形量地表空間分布，總結(jié)不同地質(zhì)構(gòu)造條件下的變化規(guī)律；在不同巖性情況下，比較洞身最大變形量大小、隧道開挖對山體損傷區(qū)域范圍大小，總結(jié)不同巖性條件下的變化規(guī)律。 4）在以上計(jì)算結(jié)果中，對結(jié)果數(shù)據(jù)均進(jìn)行量化分析，找出最為敏感的數(shù)值變化范圍。
[Abstract]:In recent years, with the rapid development of traffic industry, more highway tunnels, high-speed railway tunnels and urban traffic tunnels have emerged, while modern tunnels are characterized by large cross-section, long mileage, and because of the reasons of mileage. They also have to be placed in bad geological structures. If they are not taken seriously and disturbed in the course of construction, these undesirable geological experiences will cause very large secondary disasters, which will not only affect the construction, but also cause damage to the tunnel body. It also produces secondary geological disasters, resulting in economic losses and casualties, but also damage to the natural environment. On the basis of collecting the data of Zhongliangshan Tunnel of Chongqing Rail Transit Line 1, I have established a three-dimensional geological model with the help of the 3D finite element software Midas / GTS. The simulation analysis of tunnel crossing anticline structure is carried out. 1) by using the 3D finite element software Midas / GTS ratio, the three-dimensional geological model of Geleshan is established, and the geological structure geometry model of Guanyanxia anticline is established. The initial in-situ stress state of Gele Mountain under the condition of gravity stress is simulated, and the initial geostress characteristics of the Guanyin Gorge anticline section are analyzed. 2) the Zhongliangshan Tunnel of Chongqing Rail Transit Line 1 has passed through the Guanyin Gorge anticline. Based on the three-dimensional geological model of Geleshan, the excavation of Zhongliangshan Tunnel has been simulated in the key area. For example, through the core of anticline, the sensitive part of geological structure, such as wing, etc., summarizes the magnitude of deformation of tunnel body, the distribution trend of displacement field of mountain body, the redistribution of stress field of mountain body, and the disturbed area of mountain body by tunnel excavation. The damage area of mountain body and the surface deformation caused by tunnel excavation are analyzed, and the related laws are obtained. 3) based on the 3D geological model of Geleshan, Different geological structures and different lithology are applied to continue simulating tunnel excavation in order to remove the mutual interference between two reference variables of geological conditions and different lithology, and to investigate the influence of different lithology in the same geological structure. And to investigate the influence of different geological structures in the same lithology. The results of the analysis are compared in transverse quantitative analysis. Under different geological structures, the maximum regional distribution characteristics of deformation, the maximum distribution zone of principal stress concentration, the distribution zone of shear stress concentration, and the distribution zone of shear stress concentration are compared. The distribution area of plastic zone and the surface space distribution of mountain surface deformation quantity, sum up the change law under different geological structure condition, compare the maximum deformation of tunnel body, the damage area of tunnel excavation to mountain body under different lithology condition, The variation law under different lithologic conditions is summarized. 4) in the above calculation results, the most sensitive range of numerical variation is found by quantitative analysis of the result data.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P642.2;U452.1

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