發(fā)布時間：2018-07-18 18:48

【摘要】：隨著國內礦井建設朝著大型化、集約化和現代化發(fā)展,傳統(tǒng)的礦井施工方法面臨新的挑戰(zhàn),難以滿足大型礦井快速安全建設的要求。盾構具有機械化程度高、施工質量好、掘進速度快、節(jié)省勞動力、安全等明顯優(yōu)勢,在礦山中的應用越來越多,成為礦山開采掘進常用的機械設備。同時隨著我國城市化的進程,人口大量向城市集中,城市規(guī)模不斷擴大,于是地下空間的開發(fā)成為城市建設的必然趨勢。而隧道工程是地下工程的重要組成部分,盾構法因其眾多優(yōu)點而被廣泛應用于城市隧道工程的建設中。由于在盾構施工工程中,地層不可避免的會受到擾動而產生變形,當地層變形過大時便會引起一系列的工程問題。因此,對盾構施工引起的地層變形進行研究具有重大意義。本文首先對隧道盾構施工引起地層變形的國內外研究成果進行分析總結,主要有經驗公式法、模型試驗法、理論解析法、數值分析法及現場實測法等預測方法;然后對盾構施工引起地層變形的機理進行研究分析,簡單介紹了盾構法及其在我國的發(fā)展情況,詳細敘述了盾構施工引起地層變形的時空效應理論,對盾構施工引起地層變形的原因進行深入分析;結合杭州地鐵1號線文澤路站~文海南路站區(qū)間工程實際,進行盾構選型和管片結構設計,對盾構施工過程進行受力計算,采用FLAC3D建立數值模型,對盾構施工過程進行了三維動態(tài)數值模擬,研究分析盾構施工引起地層變形的規(guī)律;制定現場監(jiān)測方案,對現場實測數據和數值模擬結果進行對比分析;最后提出控制地層變形的工程措施,如避免盾構停機、合理控制土倉壓力等。研究結果表明采用數值模擬對實際工程進行地層變形預測和分析是可行的。本文研究成果對盾構隧道設計與施工具有一定的指導和參考意義。
[Abstract]:With the development of large-scale, intensive and modern mine construction in China, the traditional mine construction methods are facing new challenges, and it is difficult to meet the requirements of rapid safety construction of large-scale mines. Shield machine has many advantages, such as high mechanization, good construction quality, fast driving speed, saving labor force, safety and so on. At the same time, with the process of urbanization in China, a large number of people concentrate to the city, the scale of the city is expanding, so the development of underground space has become the inevitable trend of urban construction. Tunnel engineering is an important part of underground engineering, shield method is widely used in the construction of urban tunnel engineering because of its many advantages. In shield construction engineering, the formation will inevitably be disturbed and deformed, when the local layer deformation is too large, it will cause a series of engineering problems. Therefore, it is of great significance to study the formation deformation caused by shield construction. In this paper, the domestic and foreign research results of ground deformation caused by shield tunneling are analyzed and summarized, including empirical formula method, model test method, theoretical analysis method, numerical analysis method and field measurement method. Then, the mechanism of formation deformation caused by shield construction is studied and analyzed, the shield method and its development in China are introduced, and the space-time effect theory of stratum deformation caused by shield construction is described in detail. The causes of formation deformation caused by shield construction are deeply analyzed, combined with the actual project between Wenze Road Station and Wenhai South Road Station of Hangzhou Metro Line 1, the shield type selection and segment structure design are carried out, and the force acting on shield construction process is calculated. Using FLAC3D to establish numerical model, the 3D dynamic numerical simulation of shield construction process is carried out, and the law of ground deformation caused by shield construction is studied and analyzed, and the on-site monitoring scheme is established, and the field measured data and numerical simulation results are compared and analyzed. Finally, some engineering measures are put forward to control the formation deformation, such as avoiding shield machine shutdown and reasonably controlling the pressure of soil bunker. The results show that it is feasible to predict and analyze the formation deformation by numerical simulation. The research results of this paper have certain guidance and reference significance for shield tunnel design and construction.
【學位授予單位】：中國礦業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U455.43

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本文編號：2132649