本文選題：盾構(gòu)施工 + 風險分析��； 參考：《山東科技大學》2017年碩士論文

【摘要】：隨著我國城市軌道交通建設不斷發(fā)展,盾構(gòu)法隧道以安全、高效、環(huán)保等優(yōu)勢成為地鐵建設過程中的主力軍。受周圍環(huán)境及自身特點制約,不可避免地會出現(xiàn)盾構(gòu)法施工穿越各種復雜建(構(gòu))筑物的情況,將施工風險降到可接受范圍內(nèi),減少施工中風險事故發(fā)生,建立有效的風險控制體系成為新時代軌道交通建設的主要課題。濟南軌道交通建設處于起步階段,針對濟南地質(zhì)條件下的盾構(gòu)法施工經(jīng)驗相對匱乏,地表沉降規(guī)律研究較少,穿橋施工風險控制系統(tǒng)尚未完善。加強軌道交通建設風險管理水平,科學進行風險識別,研究適合濟南軌道交通盾構(gòu)隧道建設的風險評價和控制措施已迫在眉睫。以濟南軌道交通R1線地下段盾構(gòu)隧道為工程背景,對隧道施工進行調(diào)研與風險評估,并根據(jù)風險等級較大的工況進行分析,得到盾構(gòu)施工沉降規(guī)律及力學特性,結(jié)合盾構(gòu)施工穿橋工程進行變形規(guī)律及風險控制研究,為濟南軌道交通R1線盾構(gòu)隧道施工提供施工技術(shù)指導和風險防控方案。主要研究工作如下:(1)濟南軌道交通盾構(gòu)風險辨識及風險等級劃分。結(jié)合濟南地區(qū)厚沖積平原地質(zhì)特征、周邊環(huán)境、盾構(gòu)施工工藝、工區(qū)特點等相關(guān)風險源,提出風險源辨識清單,研究可定量評估盾構(gòu)施工過程中風險等級的劃分方法,提出R1線風險評估方法,引入風險雙層次分析方法(即技術(shù)層面和工程管理層面),便于指導濟南軌道交通盾構(gòu)施工安全生產(chǎn)和安全管理。(2)盾構(gòu)隧道施工沉降變形規(guī)律研究�？偨Y(jié)盾構(gòu)法施工引起地層變形機理,針對濟南軌道交通風險等級較大的工況(玉王區(qū)間入地段施工工程)進行分析,結(jié)合濟南地區(qū)地質(zhì)條件建立數(shù)值模擬進行盾構(gòu)開挖對地層變形規(guī)律研究,并提出埋深與土體加固參數(shù)等因素對地表沉降變形的影響。(3)盾構(gòu)隧道穿橋安全控制技術(shù)研究。針對濟南軌道交通風險等級較大的工況(盾構(gòu)穿越京滬鐵路框架橋)進行分析,建立高精度數(shù)值模型,分析盾構(gòu)穿橋施工中各結(jié)構(gòu)部分的變形規(guī)律及力學特征,制定相應的工程加固措施,通過現(xiàn)場監(jiān)測數(shù)據(jù)進行反饋,總結(jié)盾構(gòu)穿越過程現(xiàn)場變形規(guī)律并優(yōu)化盾構(gòu)掘進參數(shù),建立盾構(gòu)穿橋施工安全預警控制指標及風險控制體系,保障下穿施工過程中既有建(構(gòu))筑物的安全穩(wěn)定性,并將研究成果推廣到類似工程中。(4)盾構(gòu)隧道側(cè)穿橋樁施工控制研究。針對濟南軌道交通風險等級較大的工況(盾構(gòu)側(cè)穿新建聯(lián)絡線橋樁)進行分析,結(jié)合穿越京滬鐵路框架橋施工風險控制經(jīng)驗,建立數(shù)值模型,得到盾構(gòu)側(cè)穿橋樁不同階段地表沉降規(guī)律及橋樁偏移規(guī)律,提出風險控制措施及變形控制標準,為安全施工提供參考。
[Abstract]:With the continuous development of urban rail transit construction in China, shield tunneling has become the main force in subway construction with the advantages of safety, high efficiency and environmental protection. Restricted by the surrounding environment and its own characteristics, it is inevitable that the shield construction will pass through all kinds of complex building (construction), reduce the construction risk to the acceptable range, and reduce the risk accidents in the construction. The establishment of effective risk control system has become the main subject of rail transit construction in the new era. The construction of Jinan rail transit is in its infancy. The experience of shield tunneling under the geological conditions of Jinan is relatively scarce, the research on the law of ground subsidence is less, and the risk control system of bridge crossing construction is not perfect. It is urgent to strengthen the risk management level of rail transit construction, to identify risks scientifically, and to study the risk evaluation and control measures suitable for the construction of shield tunnel of Jinan rail transit. Taking the shield tunneling in the underground section of the R1 line of Jinan rail transit as the engineering background, the tunnel construction is investigated and the risk assessment is carried out, and the settlement law and mechanical characteristics of shield construction are obtained according to the working conditions with higher risk grade. Based on the study of deformation law and risk control of shield tunneling project, this paper provides construction technical guidance and risk prevention and control scheme for shield tunnel construction of R1 line of Jinan rail transit. The main research work is as follows: 1) Jinan rail transit shield machine risk identification and risk classification. Based on the geological characteristics of the thick alluvial plain in Jinan area, the surrounding environment, the construction technology of shield machine, the characteristics of the working area and other related risk sources, the identification list of risk sources is put forward, and the method of classifying risk grades in the course of shield construction can be quantitatively evaluated. The risk assessment method of R1 line is put forward, and the double analysis method of risk is introduced (that is, technical level and engineering management level), which is convenient to guide the research on settlement deformation law of shield tunneling construction in Jinan rail transit construction safety production and safety management. In this paper, the mechanism of formation deformation caused by shield tunneling is summarized, and the working condition of Jinan rail transit with high risk grade (construction engineering in Yuwang section) is analyzed. Based on the numerical simulation of geological conditions in Jinan area, the deformation law of shield tunneling is studied, and the influence of factors such as buried depth and soil reinforcement parameters on ground subsidence and deformation is put forward. The safety control technology of shield tunnel through bridge is studied. In view of the working condition of Jinan rail transit with high risk grade (shield passing through the frame bridge of Beijing-Shanghai railway), a high-precision numerical model is established, and the deformation law and mechanical characteristics of each structural part in the construction of shield tunneling bridge are analyzed. The corresponding reinforcement measures are formulated, the field deformation rules of shield tunneling process are summarized and the parameters of shield tunneling are optimized, and the early warning control index and risk control system of shield tunneling bridge construction are established through the feedback of field monitoring data. In order to ensure the safety and stability of the existing structures in the process of construction under penetration, the research results are extended to the construction control research of side piercing piles of shield tunnels in similar projects. In view of the working condition of Jinan rail transit with high risk grade (shield side piercing new tie line bridge pile), combined with the risk control experience in construction of frame bridge across Beijing-Shanghai railway, a numerical model is established. The ground subsidence law and the displacement law of bridge pile in different stages of shield side crossing bridge pile are obtained, and the risk control measures and deformation control standard are put forward, which can provide a reference for safe construction.
【學位授予單位】：山東科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U455.43

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