本文選題：近接隧道施工 + 近接度�。� 參考：《武漢理工大學》2014年碩士論文

【摘要】：隨著國民經濟不斷躍升，鐵路建設迎來了前所未有的發(fā)展機遇期。鐵路近接隧道施工作為隧道施工中技術難度較大的施工類型，愈發(fā)頻繁的出現(xiàn)在各個交通建設工地上。同時，其伴生的各種安全隱患所引發(fā)的問題也越來越多。面對施工進度緊迫、安全保障任務重、社會關注度高等問題，國內外專家紛紛開展近接隧道施工的相關研究。 論文以福平線近接隧道施工為背景，針對福平線隧道施工地質情況復雜，，施工手段多樣，安全隱患突出的特點，從近接隧道施工力學機理和圍巖應力變化規(guī)律出發(fā)，開展近接隧道施工影響分析。借助LabVIEW虛擬儀器軟件平臺，開發(fā)了近接隧道施工風險評價系統(tǒng)。論文特色及主要工作包括以下幾個方面： （1）運用彈塑性力學中的管壁理論，將近接施工中隧道開挖過程簡化為平面應力狀態(tài)下的力學模型。分析隧道開挖后圍巖應力場，劃分隧道周邊的彈性范圍與塑性范圍，以此作為隧道交互影響因素；進而分析影響施工穩(wěn)定性的構成因素。 （2）依靠福平線近接隧道施工項目，運用數值模擬軟件對近接隧道施工中出現(xiàn)的：平行近接、上跨近接,開展穩(wěn)定性模擬研究，分析隧道安全系數在不同工況、不同近接距離上的變化規(guī)律，探究隧道斷面上安全系數危險點，以及施工過程中既有隧道斷面的位移變化趨勢，得到既有隧道在近接施工中位移量較大的位置。 （3）建立近接隧道施工風險評價模型，運用模糊綜合評價法與AHP的評價算法，將評價模型導入虛擬儀器軟件平臺LabVIEW，綜合ACCESS數據庫和LabSQL的架構理論，開發(fā)了近接隧道施工安全風險評價軟件，實現(xiàn)不同用戶身份的登錄、打分、評價以及查詢和打印功能。 論文通過上述研究取得的成果，經理論推導、數值模擬，以及結合工程實例的安全評價系統(tǒng)驗證，能夠為隧道近接施工安全提供指導。
[Abstract]:As the national economy leaps and bounds, railway construction ushered in an unprecedented period of development opportunities. As a difficult construction type in tunnel construction, railway adjacent tunnel construction appears more and more frequently in each traffic construction site. At the same time, there are more and more problems caused by various security risks associated with it. In the face of urgent construction progress, heavy security tasks, high social concern and other problems, domestic and foreign experts have carried out close tunnel construction related research. In this paper, based on the characteristics of complex geological conditions, various construction methods and prominent safety hidden dangers, the paper starts from the construction mechanics mechanism and the stress change law of surrounding rock in the near connection tunnel construction with the background of the construction of the near Fuping line tunnel and the characteristics of the construction geological conditions of the tunnel of the Fuping line. Carry out the analysis of the influence of the construction of the adjacent tunnel. Based on LabVIEW virtual instrument software platform, a risk assessment system for near tunnel construction is developed. The characteristics and main work of this paper include the following aspects: (1) by using the theory of tube wall in elastoplastic mechanics, the excavation process of the tunnel is simplified to a mechanical model under plane stress. The stress field of surrounding rock after tunnel excavation is analyzed, and the elastic range and plastic range of tunnel periphery are divided, which is regarded as the interaction factor of tunnel. Then it analyzes the factors that influence the stability of the construction. (2) based on the construction project of the near connection tunnel of the Fuping Line, the numerical simulation software is used to simulate the stability of the adjacent tunnel: parallel close connection, upper span close connection, and so on. This paper analyzes the variation law of tunnel safety factor in different working conditions and close distance, probes into the dangerous point of safety factor on tunnel section, and discusses the trend of displacement change of existing tunnel section during construction. The location of the displacement of the existing tunnel in the near connection construction is obtained. (3) the risk evaluation model of the adjacent tunnel construction is established, and the fuzzy comprehensive evaluation method and AHP evaluation algorithm are used. The evaluation model is imported into LabVIEW, a virtual instrument software platform, and the access database and LabSQL architecture theory are integrated to develop the safety risk assessment software for the construction of proximity tunnel. The functions of login, scoring, evaluation, query and printing of different user identities are realized. Through the above research results, through theoretical derivation, numerical simulation, and safety evaluation system verification combined with engineering examples, this paper can provide guidance for tunnel construction safety.
【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U455

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