本文選題：隧道　切入點：模型試驗　出處：《重慶交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來,伴隨我國城市化進(jìn)程和西部大開發(fā)戰(zhàn)略的不斷推進(jìn),特殊復(fù)雜隧道工程例如高烈度區(qū)隧道、復(fù)雜地質(zhì)條件隧道等將越來越多地展現(xiàn)在工程建設(shè)者面前。這些工程往往具有特殊性和復(fù)雜性,很難用現(xiàn)有理論進(jìn)行描述。隧道模型試驗?zāi)茉谝欢ǔ潭认卤荛_理論研究的很多不不甚合理的假設(shè),更真實地模擬現(xiàn)實情況,因此在這類工程的研究中扮演著重要角色。 試驗中的模擬隧道—土體結(jié)構(gòu)能否全面準(zhǔn)確地反映真實結(jié)構(gòu)的各種特性是試驗精確與否的前提條件,而影響試驗精確性的一個最重要的因素是隧道模型材料能否滿足原型和模型之間由相似理論提出的各項物理力學(xué)參數(shù)。而在試驗中模型材料和原型材料必然會有一些性質(zhì)上的偏差,這種偏差雖不可消除但必須盡可能小。在這種情況下,研究模擬材料各參數(shù)偏差對試驗數(shù)據(jù)結(jié)果的影響從而對試驗精度進(jìn)行有目的性的控制就具有重要的意義,本文依托國家自然科學(xué)基金科研項目《基于動力特性的隧道抗震設(shè)計深淺埋劃分辦法》,主要做了如下幾個方面的工作： ①總結(jié)了國內(nèi)外對隧道動力試驗的相關(guān)問題研究現(xiàn)狀,以及基于相似理論的模型模擬材料研究現(xiàn)狀。 ②探討了隧道—土體結(jié)構(gòu)的合理計算區(qū)域從而給出了原型在動力作用下的計算模型。 ③研究了模擬圍巖材料彈性模量、密度、泊松比、粘聚力和內(nèi)摩擦角相對相似理論提出的材料參數(shù)嚴(yán)格相似比的偏差對于實驗精度的影響。 ④研究了模擬襯砌材料彈性模量、密度、泊松比相對相似理論提出的材料參數(shù)嚴(yán)格相似比的偏差對于實驗精度的影響。 ⑤研究了邊界緩沖材料密度、厚度對于實驗精度的影響。 本文根據(jù)研究結(jié)果認(rèn)為：模型框架內(nèi)部和模擬圍巖接觸處應(yīng)設(shè)置一定厚度的邊界緩沖層,模擬圍巖的彈性模量、密度、泊松比偏差對于動力實驗數(shù)據(jù)的精確度的影響較大,這些材料參數(shù)偏差應(yīng)嚴(yán)格控制在容許誤差以內(nèi)；模擬襯砌彈性模量偏差、密度偏差、泊松比偏差對于動力實驗數(shù)據(jù)的精確度的影響不大,這些參數(shù)的誤差可以適量放寬；模擬襯砌材料采用石膏：重晶石：石英沙：水：氯丁膠粘劑=1：1：1.5：1.3：0.3(重量比)；模擬圍巖材料采用石英砂：松香酒精溶液：氯丁膠粘劑：重晶石：水：石膏=1：0.418：0.34：4.47：0.472：0.185(重量比)。
[Abstract]:In recent years, with the development of urbanization and the development of western China, special and complex tunnel projects, such as tunnels in high-intensity areas, The complex geological conditions, such as tunnels, will be more and more presented to the constructors of the projects, which are often special and complex. It is difficult to describe the existing theory. Tunnel model test can avoid many unreasonable assumptions of theoretical research to a certain extent and simulate the real situation more truthfully, so it plays an important role in the research of this kind of engineering. Whether the simulated tunnel-soil structure in the test can fully and accurately reflect the various characteristics of the real structure is a prerequisite for the accuracy of the test. One of the most important factors affecting the accuracy of the test is whether the tunnel model material can satisfy the physical and mechanical parameters proposed by the similarity theory between the prototype and the model. Some nature deviations, In this case, it is of great significance to study the effect of the deviation of parameters of simulated materials on the results of test data and thus to control test accuracy purposefully. Based on the research project of National Natural Science Foundation of China, "the method of dividing the depth and depth of seismic design based on dynamic characteristics", this paper mainly does the following work:. The main contents are as follows: 1. The current situation of research on dynamic test of tunnel is summarized, and the research status of model simulation material based on similarity theory is also summarized. 2. The reasonable calculation area of tunnel-soil structure is discussed and the calculation model of prototype under dynamic action is given. (3) the influence of the deviation of material parameters such as elastic modulus, density, Poisson's ratio, cohesion and internal friction angle on the experimental accuracy is studied. (4) the influence of the deviation of the strict similarity ratio of the material parameters on the experimental accuracy is studied, which is based on the relative similarity theory of simulating the elastic modulus, density and Poisson's ratio of lining materials. 5. The influence of the density and thickness of the boundary buffer material on the experimental accuracy is studied. Based on the results of the study, it is concluded that a certain thickness of boundary buffer layer should be set in the frame of the model and the contact of the simulated surrounding rock, and the elastic modulus, density and Poisson's ratio deviation of the surrounding rock should have a great influence on the accuracy of the dynamic experimental data. The deviation of these material parameters should be strictly controlled within the allowable error, and the deviation of elastic modulus, density and Poisson's ratio of the simulated lining has little effect on the accuracy of the dynamic experimental data, and the error of these parameters can be relaxed appropriately. The simulated lining materials are gypsum: barite: quartz sand: water: Chloroprene adhesive 1: 1. 5: 1. 3: 0.3: 0.3 (weight ratio); simulated surrounding rock material is quartz sand: Rosin alcohol solution: Chloroprene adhesive: barite: water: gypsum: gypsum 1 0.418: 0. 34: 4.47 4. 472: 0. 185.
【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】：U456

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