【摘要】：隨著我國社會(huì)的不斷發(fā)展,城市規(guī)模越來越大,人口原來密集。很多問題,例如交通擁擠等隨之而來。在解決城市交通問題的過程中,地鐵擁有很多優(yōu)點(diǎn),例如運(yùn)輸量大,速度快,安全,節(jié)約土地等,因此得以迅速發(fā)展。在此同時(shí),作為我國交通組成的一個(gè)重要的組成部分,高鐵的發(fā)展也極為迅速。綜合考慮到日后的地鐵修建過程中,很多施工會(huì)采用盾構(gòu)法這種施工方法,由于盾構(gòu)下穿施工會(huì)引起地層的變形,同時(shí)也會(huì)使高鐵軌道產(chǎn)生不平順現(xiàn)象,對高速鐵路的運(yùn)行造成一定的隱患和安全問題。本文以南京地鐵機(jī)場線下穿高速鐵路橋群作為實(shí)際工程背景,通過有限元軟件的數(shù)值模擬以及與實(shí)際監(jiān)測數(shù)據(jù)進(jìn)行對比分析,對盾構(gòu)不同方法進(jìn)行開挖和開挖過程對軌道的影響,對地層的作用和列車的動(dòng)力響應(yīng)進(jìn)行了分析研究,全文工作如下:(1)對盾構(gòu)施工引起的地層變形和沉降做了分析,找出盾構(gòu)施工引起變形和沉降的主要原因,為進(jìn)一步的穿越施工提供了正確的思路。(2)利用ABAQUS軟件創(chuàng)建了三維有限元模型,研究了不同開挖方式下承臺(tái)的變形,沉降等數(shù)據(jù),對開挖方式的效果和作用做出了分析。(3)利用ABAQUS軟件創(chuàng)建了列車,軌道之間的三維模型,將列車運(yùn)功過程中的振動(dòng)加速度當(dāng)做參考量,研究了在不同開挖步下鎖造成的振動(dòng)加速度的數(shù)值,并將結(jié)果與我國高速鐵路設(shè)計(jì)規(guī)范進(jìn)行對比,得出結(jié)論。(4)通過現(xiàn)場監(jiān)測獲得的數(shù)據(jù),與數(shù)值模擬結(jié)果進(jìn)行對比,進(jìn)而確定對實(shí)際的施工方案進(jìn)行確定,并證明有限元模擬的合理性。
[Abstract]:With the continuous development of our society, the scale of the city is becoming larger and larger, and the population is dense. Many problems, such as traffic congestion, followed. In the process of solving urban traffic problems, subway has many advantages, such as large volume of transportation, fast speed, safety, saving land and so on, so it can develop rapidly. At the same time, as an important component of China's traffic composition, high-speed rail development is also extremely rapid. Considering comprehensively that in the course of subway construction in the future, many construction methods such as shield tunneling will be used, because the tunneling under shield will cause formation deformation, and at the same time, it will cause irregularity of high-speed railway track. It causes some hidden trouble and safety problems to the operation of high-speed railway. In this paper, taking the high-speed railway bridge group under Nanjing Metro Airport Line as the background of practical engineering, the numerical simulation of finite element software and the comparison with the actual monitoring data are carried out. The influence of excavation and excavation process on track, the action of stratum and the dynamic response of train are analyzed. The main work is as follows: (1) the deformation and settlement caused by shield tunneling are analyzed. Find out the main causes of deformation and settlement caused by shield construction, and provide a correct way of thinking for further crossing construction. (2) the three-dimensional finite element model is created by using ABAQUS software, and the deformation of cap under different excavation modes is studied. The effect and function of the excavation method are analyzed. (3) the three-dimensional model between train and track is created by using ABAQUS software, and the vibration acceleration in the process of train work transportation is taken as the reference value. The numerical value of vibration acceleration caused by different excavation steps is studied, and the results are compared with the design code of high-speed railway in China. (4) the data obtained by field monitoring are compared with the results of numerical simulation. Then the actual construction scheme is determined, and the rationality of finite element simulation is proved.
【學(xué)位授予單位】：安徽建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U455.43;U231.3;U442

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