【摘要】：本文的主要內(nèi)容是通過地層沉降理論、工程數(shù)值模擬和監(jiān)控量測成果等各方面闡明某地鐵工程中地表沉降規(guī)律,并介紹施工過程中的動態(tài)控制方法。 文章首先詳細闡述了國內(nèi)外盾構法的應用情況,地層位移的研究方法,盾構法施工時地表沉降的相關研究。并針對施工場景相對少見的地鐵隧道下穿停機坪的研究方法和施工控制要點進行了簡要說明。 其次,文章認為土壓平衡盾構法的選用對特定土質施工過程控制意義重大,并從盾構機的選型方面,以工程實例為基礎探究了小松加泥式土壓平衡盾構在我國大部分地區(qū)的廣泛適用性,對其在不同適用地層中的作用機理、工程中的應用情況做出了較深入的探討。 再次,以天津地鐵2號線機場延長線工程為例,從數(shù)值模擬和監(jiān)控量測兩個方面對地表和地層變形進行了研究,對施工完成后的沉降控制效果進行分析,得出施工工藝和技術控制措施的合理性。該工程中,盾構隧道下穿對變形敏感的機場停機坪,變形影響因素較多,文章側重于施工監(jiān)測和施工控制的協(xié)調(diào),實際施工過程中可操作性強、效果明顯。 最后,總結得出盾構隧道施工時,影響停機坪變形的主要因素以及控制地表變形的主要方法,為類似工程的施工提供了一定的參考。
[Abstract]:The main content of this paper is to expound the law of surface subsidence in a subway project from the aspects of ground settlement theory, engineering numerical simulation and monitoring measurement results, and introduce the dynamic control method in the construction process. In this paper, the application of shield method at home and abroad, the research method of ground displacement and the research of ground subsidence during shield construction are described in detail. The research methods and construction control points of subway tunnel through apron which are relatively rare in construction scene are briefly described. Secondly, it is considered that the selection of earth pressure balance shield method is of great significance to the control of specific soil construction process, and from the aspect of shield machine selection, Based on engineering examples, this paper probes into the wide applicability of Komatsu and mud type earth pressure balance shield machine in most areas of our country, and makes a deep discussion on its action mechanism in different applicable strata and its application in engineering. Thirdly, taking Tianjin Metro Line 2 Airport extension Project as an example, the surface and ground deformation are studied from two aspects of numerical simulation and monitoring measurement, and the effect of settlement control after construction is analyzed. The rationality of construction technology and technical control measures is obtained. In this project, the shield tunnel passes through the airport apron which is sensitive to deformation, and there are many factors affecting the deformation. The paper emphasizes on the coordination of construction monitoring and construction control, and the practical construction process has strong maneuverability and obvious effect. Finally, it is concluded that the main factors affecting the apron deformation and the main methods to control the surface deformation during the shield tunnel construction provide a certain reference for the construction of similar projects.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U455.43

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