【摘要】：本文的主要內(nèi)容是通過(guò)地層沉降理論、工程數(shù)值模擬和監(jiān)控量測(cè)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(guò)程中的動(dòng)態(tài)控制方法。 文章首先詳細(xì)闡述了國(guó)內(nèi)外盾構(gòu)法的應(yīng)用情況,地層位移的研究方法,盾構(gòu)法施工時(shí)地表沉降的相關(guān)研究。并針對(duì)施工場(chǎng)景相對(duì)少見的地鐵隧道下穿停機(jī)坪的研究方法和施工控制要點(diǎn)進(jìn)行了簡(jiǎn)要說(shuō)明。 其次,文章認(rèn)為土壓平衡盾構(gòu)法的選用對(duì)特定土質(zhì)施工過(guò)程控制意義重大,并從盾構(gòu)機(jī)的選型方面,以工程實(shí)例為基礎(chǔ)探究了小松加泥式土壓平衡盾構(gòu)在我國(guó)大部分地區(qū)的廣泛適用性,對(duì)其在不同適用地層中的作用機(jī)理、工程中的應(yīng)用情況做出了較深入的探討。 再次,以天津地鐵2號(hào)線機(jī)場(chǎng)延長(zhǎng)線工程為例,從數(shù)值模擬和監(jiān)控量測(cè)兩個(gè)方面對(duì)地表和地層變形進(jìn)行了研究,對(duì)施工完成后的沉降控制效果進(jìn)行分析,得出施工工藝和技術(shù)控制措施的合理性。該工程中,盾構(gòu)隧道下穿對(duì)變形敏感的機(jī)場(chǎng)停機(jī)坪,變形影響因素較多,文章側(cè)重于施工監(jiān)測(cè)和施工控制的協(xié)調(diào),實(shí)際施工過(guò)程中可操作性強(qiáng)、效果明顯。 最后,總結(jié)得出盾構(gòu)隧道施工時(shí),影響停機(jī)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(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U455.43

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