本文選題：頂管 + 地表變形��； 參考：《安徽理工大學(xué)》2015年碩士論文

【摘要】：鄭州市為了緩解城市交通壓力,在興建城市軌道交通系統(tǒng)的同時也在進行各種道路下穿隧道的建設(shè)工程。為了減小施工對道路交通的影響,鄭州市中州大道紅專路下穿隧道采用頂管法進行施工。同時,研究隧道施工引起的地表沉陷問題也是必要的。本文通過分析頂管隧道施工對地表變形的影響,研究頂管隧道引起地表沉降的規(guī)律,同時使用相關(guān)有限元分析軟件建立物理模型,驗證模型的適用性和可靠性。 本文的主要研究方法是： 1)通過查閱文獻(xiàn)與分析,研究隧道施工引起地表沉降的一般規(guī)律；之后結(jié)合頂管法隧道施工的特殊施工工藝和工程實例的特定地質(zhì)、環(huán)境條件,總結(jié)頂管法隧道施工引起地表沉降的規(guī)律； 2)通過對實際工程的實地監(jiān)測,并對數(shù)據(jù)進行計算、處理與分析,研究實際工程的地表沉降規(guī)律； 3)選用適宜、合理的相關(guān)參數(shù),使用有限元分析軟件MIDAS-GTS建立物理模型模擬頂管隧道施工過程,并對模型進行計算,得出結(jié)果,通過模擬結(jié)果與實測數(shù)據(jù)的對比,驗證模型是否適用。 通過研究、計算與分析,本文得出了頂管法隧道施工引起地表沉降的規(guī)律及其特殊性,同時地表最大沉降的實測結(jié)果與模型計算結(jié)果相差小于2mm,其他點位沉降相差也非常小,驗證了模型的可靠性。 在分析地表沉降規(guī)律時,除研究其一般規(guī)律外,需要結(jié)合頂管法隧道施工的特殊工藝及特殊地質(zhì)進行分析,得出頂管法施工對于注漿的依賴與要求相對其他施工工藝更高的結(jié)論；同時,建立模型時需要選擇合適的土質(zhì)參數(shù)、土體本構(gòu)模型、施工階段等,并需要反復(fù)計算與調(diào)整,才能使模型更加接近實際。
[Abstract]:In order to alleviate the urban traffic pressure in Zhengzhou, the construction of tunnel construction under various roads is also carried out at the same time in the construction of urban rail transit system. In order to reduce the impact of construction on the road traffic, the tunnel under the red school road of Zhongzhou Avenue in Zhengzhou is constructed by pipe jacking. By analyzing the influence of tunnel construction on surface deformation, this paper studies the law of ground subsidence caused by pipe jacking tunnel, and uses the related finite element analysis software to establish the physical model to verify the applicability and reliability of the model.
The main research methods of this paper are as follows:
1) through consulting literature and analysis, the general law of ground subsidence caused by tunnel construction is studied, and then the law of ground subsidence caused by tunnel construction by pipe jacking method is summed up by combining special construction technology of tunnel construction with pipe jacking method and specific geological and environmental conditions of engineering examples.
2) through the actual monitoring of the actual project, and the data calculation, processing and analysis, to study the surface settlement law of the actual project;
3) select the appropriate and reasonable relevant parameters and use the finite element analysis software MIDAS-GTS to establish the physical model to simulate the construction process of the pipe jacking tunnel, and calculate the model, and get the result. By comparing the simulated results with the measured data, the model is verified to be applicable.
Through the study, calculation and analysis, the law and particularity of the ground settlement caused by pipe jacking tunnel construction are obtained. At the same time, the difference between the measured results of the maximum surface subsidence and the model calculation is less than 2mm, and the difference of the other point settlement is very small, which verifies the reliability of the model.
In the analysis of the law of ground subsidence, in addition to studying its general rules, it is necessary to combine the special process and special geology of the tunnel construction with the pipe jacking method, and obtain the conclusion that the roof pipe method is more dependent on the grouting and the requirements relative to the other construction technology. At the same time, the suitable soil parameters and soil constitutive model should be selected when the model is established. Type, construction stage, etc., and need to be repeatedly calculated and adjusted to make the model more realistic.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U455;P642.26

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本文編號：2009311