本文選題：盾構(gòu)隧道　切入點：地表沉降　出處：《寧波大學(xué)》2015年碩士論文

【摘要】：盾構(gòu)隧道施工時,其開挖會對周圍地層產(chǎn)生土體擾動,導(dǎo)致隧道周邊地層發(fā)生變形,引起地表沉降。當?shù)貙舆\動超過一定限度時,會影響周邊建(構(gòu))筑物、道路、管線等的結(jié)構(gòu)安全與正常使用。因此,如何預(yù)測和控制隧道的地表沉降已成為工程界關(guān)心的重要問題。近年來,針對寧波軟土盾構(gòu)隧道施工技術(shù)和施工變形特征已開展了一定的研究,積累了一定的成果。然而,迄今為止,尚未對寧波軟土盾構(gòu)隧道施工引起的長期沉降特性進行研究,有關(guān)于寧波軟土盾構(gòu)隧道的固結(jié)沉降問題尚有待于深入探索。為此,本文以寧波軌道交通一號線工程為依托,對盾構(gòu)施工引起的地表沉降規(guī)律及長期沉降特性開展研究,可為在建和后續(xù)工程施工安全及如何減小對周邊環(huán)境的影響提供技術(shù)支撐。論文主要內(nèi)容如下:1.對寧波軌道交通一號線望春橋站到澤民站區(qū)間盾構(gòu)開挖引起的地表沉降進行監(jiān)測,選取其中典型斷面的數(shù)據(jù),結(jié)合工程所處地層條件,對盾構(gòu)施工引起的地表橫向沉降特征和縱向沉降特征進行了研究分析,得到了寧波軟土環(huán)境下盾構(gòu)施工引起的地表沉降規(guī)律。2.基于典型斷面的實測數(shù)據(jù),運用origin8.0軟件并結(jié)合傳統(tǒng)預(yù)測方法的經(jīng)驗公式進行擬合分析,驗證了Peck公式等傳統(tǒng)預(yù)測方法在寧波地區(qū)軟土地層環(huán)境下的適用性。3.結(jié)合寧波軌道交通一號線望春橋站到澤民站區(qū)間工程實際情況,運用有限元分析軟件ABAQUS對盾構(gòu)隧道開挖后土體的固結(jié)沉降進行數(shù)值模擬,得出了盾構(gòu)施工引起的地表長期沉降性狀和孔隙水壓力變化規(guī)律。
[Abstract]:During the construction of shield tunnel, the excavation of shield tunnel will disturb the surrounding soil, cause deformation of the surrounding stratum and cause ground subsidence. When the local layer movement exceeds a certain limit, it will affect the surrounding building (construction) and the road. Therefore, how to predict and control the surface settlement of tunnels has become an important issue of concern to the engineering community in recent years. Some researches have been carried out on the construction technology and deformation characteristics of Ningbo soft soil shield tunnel, and some achievements have been accumulated. However, up to now, no research has been done on the long-term settlement characteristics caused by the construction of Ningbo soft soil shield tunnel. There are some problems about the consolidation settlement of shield tunnel in Ningbo soft soil still need to be deeply explored. Therefore, based on the project of Ningbo Rail Transit Line 1, this paper studies the law of ground subsidence and long-term settlement characteristics caused by shield tunneling. It can provide technical support for construction safety and how to reduce the impact on the surrounding environment. The main contents of this paper are as follows: 1. From Wangchun Bridge Station of Ningbo Rail Transit Line 1 to the ground caused by shield tunneling in the railway station area of Zemin. Surface subsidence is monitored, Selecting the data of typical sections and combining the stratum conditions of the project, the characteristics of transverse and longitudinal subsidence caused by shield tunneling are studied and analyzed. The law of ground subsidence caused by shield tunneling in soft soil environment of Ningbo is obtained. 2. Based on the measured data of typical sections, the fitting analysis is carried out by using origin8.0 software and combining with the empirical formula of traditional forecasting method. The applicability of traditional prediction methods, such as Peck formula, in the soft soil environment of Ningbo area is verified. 3. Combined with the actual situation of the project between Wangchun Bridge Station and Zemin Station of Ningbo Rail Transit Line 1, The consolidation settlement of soil after excavation of shield tunnel is simulated by using finite element analysis software ABAQUS. The long-term settlement characteristics and pore water pressure variation law caused by shield tunneling are obtained.
【學(xué)位授予單位】：寧波大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U455.43;U231.3

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本文編號：1666995