盾構(gòu)襯砌管片接頭力學(xué)性能的研究
發(fā)布時(shí)間：2019-03-27 15:26
【摘要】：隨著我國經(jīng)濟(jì)的快速發(fā)展,在許多人口密集地區(qū)土地資源變得尤其緊張,地下空間的開發(fā)便成為了一個(gè)有效緩解城市壓力的方法。作為開發(fā)地下空間的重要方法之一,盾構(gòu)法作為一種安全高效的施工技術(shù)正逐漸被推廣并在越來越多的情況下應(yīng)用。目前我國還沒有較為成熟的盾構(gòu)襯砌設(shè)計(jì)規(guī)范,這使得我國在盾構(gòu)砌結(jié)構(gòu)設(shè)計(jì)上具有很大的盲目性和不確定性。在影響襯砌設(shè)計(jì)的因素中,盾構(gòu)管片接頭部分對整個(gè)結(jié)構(gòu)的受力影響是不容忽視的。本文通過較為成熟的計(jì)算分析以及有限元法研究對比分析了地鐵隧道盾構(gòu)襯砌在不同條件下襯管片頭部分的應(yīng)力和應(yīng)變情況,對不同條件下管片接頭的力學(xué)性能進(jìn)行了研究。首先本文介紹了研究背景以及盾構(gòu)法在目前國內(nèi)外的發(fā)展情況,并簡單敘述了盾構(gòu)法的施工情況和優(yōu)缺點(diǎn),介紹了國內(nèi)外對管片接頭部分的研究情況和應(yīng)用情況。之后介紹了盾構(gòu)襯砌以及襯砌接頭的形式和種類,分析了不同類型的優(yōu)點(diǎn)和缺點(diǎn),并對此進(jìn)行了分類和比較,選取了建立模型的數(shù)值。在具體分析中本文首先借助較為成熟的計(jì)算方法推導(dǎo)影響襯砌受力的一些基礎(chǔ)數(shù)值,并對這些數(shù)值進(jìn)行了分析,以判斷這些數(shù)值對整個(gè)襯砌的受力影響情況。之后本文借助于有限元軟件對管片接頭部分的受力情況進(jìn)行模擬分析,分別從管片接頭的類型不同、螺栓的預(yù)緊應(yīng)力、不同偏心距的存在等無法通過成熟計(jì)算公式推導(dǎo)出來的因素進(jìn)行模擬對比,對整個(gè)接頭受力情況的變化進(jìn)行了較詳細(xì)的分析,得出了接頭在不同條件下受力情況的差異,并將這些因素歸納到一起進(jìn)行一個(gè)系統(tǒng)的總結(jié),用以分析判斷這些條件都會影響襯砌的哪些受力特性。在最后文章對所得到的的結(jié)論進(jìn)行了概括總結(jié),對管片接頭部分對襯砌接頭性能的影響因素進(jìn)行的總結(jié)分析,對不同管片接頭形式在性能上的差異進(jìn)行了對比分析,并對模擬的不足以及未來的展望進(jìn)行了敘述。
[Abstract]:With the rapid development of China's economy, land resources have become especially tense in many densely populated areas, and the development of underground space has become an effective way to relieve the pressure of the city. As one of the important methods to develop underground space, shield method, as a safe and efficient construction technology, is gradually being popularized and applied in more and more cases. At present, there is no mature design code for shield lining in our country, which makes the design of shield structure have great blindness and uncertainty. Among the factors affecting lining design, the influence of shield segment joint on the whole structure can not be ignored. In this paper, the stress and strain of shield lining of subway tunnel under different conditions are analyzed by means of mature calculation and finite element method, and the mechanical properties of segment joints under different conditions are studied. Firstly, this paper introduces the research background and the development of shield method at home and abroad, and briefly describes the construction situation, advantages and disadvantages of shield method, and introduces the research and application of segment joint at home and abroad. Then the forms and types of shield lining and lining joints are introduced, the advantages and disadvantages of different types are analyzed, and the classification and comparison are made, and the numerical value of establishing the model is selected. In order to judge the influence of these values on the stress of the whole lining, some basic values which affect the stress of the lining are deduced by means of the mature calculation method in the concrete analysis in this paper, and these values are analyzed in order to judge the influence of these values on the stress of the whole lining. In this paper, the finite element software is used to simulate and analyze the stress of the segment joint, respectively from the different type of segment joint, the pre-tensioning stress of the bolt. Some factors, such as the existence of different eccentricity, which can not be deduced by mature calculation formula, are simulated and compared, and the variation of the whole joint stress is analyzed in detail, and the difference of the stress condition of the joint under different conditions is obtained. These factors are summed up in a systematic way to analyze and judge which mechanical characteristics of the lining are affected by these conditions. At the end of the paper, the conclusion obtained is summarized and summarized, the influence factors of segment joint on lining joint performance are summarized and analyzed, and the differences in performance of different segment joint forms are compared and analyzed, and the influence factors of segment joint on the performance of lining joint are summarized and analyzed. At the same time, the deficiency of simulation and the prospect of future are described.
【學(xué)位授予單位】：沈陽建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U455.43
本文編號：2448308
[Abstract]:With the rapid development of China's economy, land resources have become especially tense in many densely populated areas, and the development of underground space has become an effective way to relieve the pressure of the city. As one of the important methods to develop underground space, shield method, as a safe and efficient construction technology, is gradually being popularized and applied in more and more cases. At present, there is no mature design code for shield lining in our country, which makes the design of shield structure have great blindness and uncertainty. Among the factors affecting lining design, the influence of shield segment joint on the whole structure can not be ignored. In this paper, the stress and strain of shield lining of subway tunnel under different conditions are analyzed by means of mature calculation and finite element method, and the mechanical properties of segment joints under different conditions are studied. Firstly, this paper introduces the research background and the development of shield method at home and abroad, and briefly describes the construction situation, advantages and disadvantages of shield method, and introduces the research and application of segment joint at home and abroad. Then the forms and types of shield lining and lining joints are introduced, the advantages and disadvantages of different types are analyzed, and the classification and comparison are made, and the numerical value of establishing the model is selected. In order to judge the influence of these values on the stress of the whole lining, some basic values which affect the stress of the lining are deduced by means of the mature calculation method in the concrete analysis in this paper, and these values are analyzed in order to judge the influence of these values on the stress of the whole lining. In this paper, the finite element software is used to simulate and analyze the stress of the segment joint, respectively from the different type of segment joint, the pre-tensioning stress of the bolt. Some factors, such as the existence of different eccentricity, which can not be deduced by mature calculation formula, are simulated and compared, and the variation of the whole joint stress is analyzed in detail, and the difference of the stress condition of the joint under different conditions is obtained. These factors are summed up in a systematic way to analyze and judge which mechanical characteristics of the lining are affected by these conditions. At the end of the paper, the conclusion obtained is summarized and summarized, the influence factors of segment joint on lining joint performance are summarized and analyzed, and the differences in performance of different segment joint forms are compared and analyzed, and the influence factors of segment joint on the performance of lining joint are summarized and analyzed. At the same time, the deficiency of simulation and the prospect of future are described.
【學(xué)位授予單位】：沈陽建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U455.43
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，本文編號：2448308
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