發(fā)布時(shí)間：2018-05-05 10:53

  本文選題：盾構(gòu)隧道 + 臨近建筑��； 參考：《天津大學(xué)》2014年碩士論文

【摘要】：中國是人口眾多的大國，隨著城市化率的日益提高，城市環(huán)境面臨著很大的挑戰(zhàn)，因此對于地下空間的需求量和開發(fā)量也日益增大。地鐵作為一種高效的交通工具在我國眾多城市大量興建，盾構(gòu)隧道施工難免對臨近土體和建筑物造成影響，，已有的工程事故也說明了對盾構(gòu)隧道施工進(jìn)行研究的必要性。因此盾構(gòu)隧道對臨近土體和建筑的研究也越來越多。 對于盾構(gòu)隧道施工對土體和臨近建筑的研究主要有三種：理論分析法、數(shù)值分析法以及現(xiàn)場實(shí)測分析法，其中數(shù)值分析法隨著計(jì)算機(jī)技術(shù)的發(fā)展和普及，被大量應(yīng)用于隧道及地下工程的研究，用來分析和預(yù)測隧道掘進(jìn)對周圍土體和建筑物的影響。 本文以天津地鐵區(qū)間隧道掘進(jìn)對土體、臨近淺基礎(chǔ)建筑、臨近橋梁樁基礎(chǔ)三個工程案例為依托，利用有限元分析軟件ABAQUS建立精細(xì)化的三維模型，分析盾構(gòu)掘進(jìn)對周圍環(huán)境的影響，有限元與實(shí)測的對比分析證明了本文所用的方法的合理性。結(jié)合工程實(shí)測總結(jié)盾構(gòu)穿越造成的地表土體沉降、土體分層沉降、土體水平位移、建筑物沉降及傾斜等規(guī)律。 在此基礎(chǔ)上，利用已有的工程地質(zhì)參數(shù)和盾構(gòu)施工參數(shù)，對于在一定掌子面壓力，不同盾殼摩擦情況下盾構(gòu)隧道掘進(jìn)對周圍土體豎向位移、水平位移、附加應(yīng)力的影響，并分析了盾構(gòu)隧道側(cè)穿摩擦樁情況下，樁身內(nèi)力、變形、樁頂沉降及樁身側(cè)摩阻力的變化。結(jié)果表明，盾殼摩擦是造成地表沉降和隆起、土體沿隧道掘進(jìn)方向水平位移的主要原因，并且隨著盾殼摩擦的增大，土體變形增大。同時(shí)盾殼摩擦的增大會造成臨近樁基礎(chǔ)樁頂沉降、側(cè)移和樁身彎矩增大，施工過程中應(yīng)采取措施減小盾殼側(cè)壁摩擦。
[Abstract]:China is a large country with a large population, with the increasing rate of urbanization, the urban environment is facing a great challenge, so the demand for underground space and the amount of development are also increasing day by day. As a kind of efficient means of transportation, subway is widely built in many cities of our country. The construction of shield tunnel will inevitably affect the adjacent soil and buildings. The existing engineering accidents also show the necessity of research on shield tunnel construction. Therefore, there are more and more researches on adjacent soil and buildings in shield tunnel. There are three kinds of research on soil mass and adjacent buildings in shield tunnel construction: theoretical analysis, numerical analysis and field measurement analysis, among which numerical analysis has been developed and popularized with the development of computer technology. It is widely used in tunnel and underground engineering to analyze and predict the influence of tunneling on surrounding soil and buildings. In this paper, based on three engineering cases of Tianjin subway tunnel tunneling on soil, near shallow foundation building and near bridge pile foundation, a fine three-dimensional model is established by using finite element analysis software ABAQUS. The influence of shield tunneling on the surrounding environment is analyzed. The comparison between finite element method and actual measurement proves the rationality of the method used in this paper. Combined with the engineering measurement, the rules of ground soil settlement, soil layered settlement, horizontal displacement of soil, building settlement and inclination caused by shield tunneling are summarized. On this basis, using the existing engineering geological parameters and shield construction parameters, the influence of shield tunneling on the vertical displacement, horizontal displacement and additional stress of surrounding soil under certain face pressure and different shield shell friction is studied. The variation of the internal force, deformation, settlement of the pile top and friction resistance of the side of the shield tunnel under the condition of friction pile on the side of the shield tunnel are analyzed. The results show that the friction of shield shell is the main cause of ground subsidence and uplift, and the horizontal displacement of soil along the direction of tunneling, and the deformation of soil increases with the increase of shield shell friction. At the same time, the increase of shield shell friction will result in settlement of pile top near pile foundation, lateral displacement and increase of pile bending moment. Measures should be taken to reduce side wall friction of shield shell during construction.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U455.43

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本文編號：1847418