發(fā)布時(shí)間：2018-11-02 14:58

【摘要】：隨著我國(guó)高速鐵路以及盾構(gòu)法施工的快速發(fā)展,在山區(qū)和城市出現(xiàn)了大量采用盾構(gòu)法施工的高速鐵路隧道。盾構(gòu)法施工具有安全、高效、自動(dòng)化程度高、對(duì)周邊擾動(dòng)小等優(yōu)勢(shì),但在盾構(gòu)隧道中通常會(huì)出現(xiàn)較多的交叉結(jié)構(gòu)形式,如聯(lián)絡(luò)橫通道結(jié)構(gòu)、到發(fā)豎井、泵房等,還包括近距離空間交叉的盾構(gòu)隧道主體結(jié)構(gòu)。因此,本文結(jié)合廣深港客運(yùn)專線獅子洋隧道,開展了實(shí)測(cè)列車振動(dòng)荷載條件下,聯(lián)絡(luò)橫通道的隧道交叉結(jié)構(gòu)、近距離空間垂直交叉盾構(gòu)隧道的塑性損傷理論,和應(yīng)力、加速度時(shí)程分析。主要研究工作和成果如下：(1)闡述了列車振動(dòng)效應(yīng)所涉及的相關(guān)計(jì)算理論,包括：動(dòng)力學(xué)計(jì)算原理、混凝土損傷理論、混凝土強(qiáng)度降低理論。并論述了材料阻尼問題、模型動(dòng)力邊界條件、混凝土塑性損傷本構(gòu)關(guān)系等。(2)為了真實(shí)的模擬出列車編組在隧道進(jìn)口段、洞內(nèi)段、出口段的時(shí)間、空間效應(yīng),采用了獨(dú)特的荷載曲線施加方式,將實(shí)測(cè)列車振動(dòng)曲線以豎向激振荷載的形式施加在列車輪軸上,同時(shí)在列車模型上施加列車自重,二力均由輪軸傳遞至軌道,同時(shí)在列車編組上施加相應(yīng)的速度,該方式可有效模擬荷載的時(shí)空變化。(3)分析了聯(lián)絡(luò)橫通道隧道交叉結(jié)構(gòu),以及近距離空間垂直交叉隧道在不同階段(新建隧道與運(yùn)營(yíng)隧道)的振動(dòng)效應(yīng),及其在隧道進(jìn)口段、洞內(nèi)段、出口段的響應(yīng)特征。對(duì)比了應(yīng)力、加速度、壓致?lián)p傷、拉致?lián)p傷等力學(xué)參數(shù)的差異。(4)針對(duì)運(yùn)營(yíng)劣化隧道,在獲得隧道劣化后主要力學(xué)指標(biāo)的基礎(chǔ)上,開展了列車不同行駛速度對(duì)應(yīng)振動(dòng)荷載的動(dòng)力響應(yīng)分析,研究了聯(lián)絡(luò)橫通道交叉結(jié)構(gòu)關(guān)鍵截面的損傷等動(dòng)力響應(yīng)特性。
[Abstract]:With the rapid development of high-speed railway and shield construction in China, there are a large number of high-speed railway tunnels constructed by shield method in mountainous areas and cities. Shield tunneling has the advantages of safety, high efficiency, high automation, low disturbance to the surrounding area, etc. However, there are usually many cross structure forms in shield tunnel, such as connecting cross passage structure, going to shaft, pumping room, etc. The main structure of shield tunnel is also included. Therefore, combined with Lion Yang Tunnel of Guangzhou-Shenzhen passenger dedicated Line, the plastic damage theory and stress of tunnel cross structure, vertical cross shield tunnel in close space, under the condition of train vibration load, are carried out in this paper. Acceleration time history analysis. The main research work and results are as follows: (1) the related calculation theory of train vibration effect is expounded, including: dynamics calculation principle, concrete damage theory, concrete strength reduction theory. The material damping problem, the dynamic boundary condition of the model and the constitutive relation of plastic damage of concrete are discussed. (2) in order to simulate the time and space effect of train formation in the entrance section, the inner section and the exit section of the tunnel, In this paper, a unique load curve is used to apply the measured train vibration curve to the train axle in the form of vertical excited vibration load, and at the same time, the train deadweight is applied on the train model, and the two forces are transferred from the axle to the track. At the same time, the corresponding speed is applied to train formation, which can effectively simulate the space-time variation of load. (3) the cross structure of the tunnel is analyzed. The vibration effect of the vertical cross tunnel in close space at different stages (new tunnel and operating tunnel) and its response characteristics in the entrance section, the inner section and the outlet section of the tunnel are also discussed. The differences of mechanical parameters such as stress, acceleration, compression damage and tensile damage are compared. (4) based on the main mechanical indexes after tunnel deterioration, The dynamic response of the train with different speeds corresponding to the vibration load is analyzed. The dynamic response characteristics of the key sections of the cross section of the connecting cross passage are studied.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U451.3

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本文編號(hào)：2306130