【摘要】：隨著高速鐵路、高速公路、城市地鐵以及各種市政工程和地下管廊的修建,出現(xiàn)了大量的地下空間工程,而輔助工作井成為連接上述地下工程的地面與地下空間所必須的通道,其結(jié)構(gòu)的安全與穩(wěn)定是設計和施工中所關(guān)注的問題。對于油氣管道,為了歸納和分析其盾構(gòu)法施工時各項的結(jié)構(gòu)設計參數(shù),結(jié)合廣東省天然氣管網(wǎng)一期工程西江泥水盾構(gòu)隧道和二期管道工程南坦海越江泥水盾構(gòu)隧道的工程特點,首先對西江盾構(gòu)隧道管片結(jié)構(gòu)進行安全性分析,并在此基礎上對南坦海盾構(gòu)隧道工作豎井及其圍護結(jié)構(gòu)以及江底段泥水盾構(gòu)隧道管片襯砌所承受的地層壓力進行現(xiàn)場測試,并通過對監(jiān)測結(jié)果的分析提出輸氣管道盾構(gòu)隧道工作豎井圍護結(jié)構(gòu)和越江段盾構(gòu)管片的優(yōu)化設計參數(shù),為今后類似油氣管道越江盾構(gòu)隧道的結(jié)構(gòu)設計提供指導。本文主要的研究內(nèi)容與成果如下:(1)結(jié)合西江盾構(gòu)隧道特點評價了管片的安全性,并在南坦海盾構(gòu)隧道的工作豎井和圍護結(jié)構(gòu)、江底段盾構(gòu)隧道管片襯砌進行現(xiàn)場測試,監(jiān)測它們受到的地層壓力,獲得了工作豎井圍護結(jié)構(gòu)地下連續(xù)墻和內(nèi)層襯砌以及江底段盾構(gòu)隧道管片所承受的地層壓力的分布狀況。(2)使用ANSYS軟件進行有限元分析,根據(jù)現(xiàn)場監(jiān)測結(jié)果,按照結(jié)構(gòu)與荷載模式計算得到始發(fā)井地下連續(xù)墻變形和內(nèi)力分布特點。(3)根據(jù)數(shù)值計算所得內(nèi)力,按照破損階段設計法對工作井圍護結(jié)構(gòu)的地下連續(xù)墻、內(nèi)層襯砌和江底段盾構(gòu)隧道管片結(jié)構(gòu)的安全性進行分析與評價。(4)依據(jù)計算結(jié)果及工程實測數(shù)據(jù)的分析,給出了油氣管道盾構(gòu)隧道工作井圍護結(jié)構(gòu)中地下連續(xù)墻、內(nèi)層襯砌及江底段盾構(gòu)隧道管片的優(yōu)化設計參數(shù)。
[Abstract]:With the construction of high-speed railways, highways, urban subways and various municipal projects and underground pipe corridors, a large number of underground space projects have emerged, and auxiliary working wells have become the necessary passage to connect the ground and underground spaces of the above mentioned underground projects. The safety and stability of its structure is a concern in design and construction. For the oil and gas pipeline, in order to summarize and analyze the structural design parameters of each item during the shield construction, combined with the engineering characteristics of Xijiang mud water shield tunnel in the first phase of Guangdong natural gas pipeline network and Nantan Haiyue River mud water shield tunnel in the second phase pipeline project, First of all, the safety analysis of the segment structure of Xijiang shield tunnel is carried out, and on this basis, the working shaft and its enclosure structure of the shield tunnel in Nantanhai, and the formation pressure of the segment lining of the mud shield tunnel in the bottom section of the river are tested on the spot. Through the analysis of the monitoring results, the optimal design parameters of the working shaft enclosure structure of shield tunnel and the shield segment of cross river section of gas transmission pipeline are put forward, which will provide guidance for the structural design of similar oil and gas pipeline tunnel crossing river shield tunnel in the future. The main contents and achievements of this paper are as follows: (1) the safety of segment is evaluated in combination with the characteristics of Xijiang shield tunnel, and field tests are carried out in the working shaft and enclosure structure of the shield tunnel in Nantanhai, and in the lining of shield tunnel segment in the bottom section of the river. Monitoring the formation pressure they are subjected to, the distribution of the underground continuous wall and inner lining of the working shaft enclosure and the shield tunnel segment in the bottom section of the river are obtained. (2) the finite element analysis is carried out by using ANSYS software. According to the field monitoring results, the deformation and internal force distribution characteristics of underground continuous wall of primary well are calculated according to the structure and load mode. (3) according to the numerical calculation of internal force, the underground continuous wall of working well enclosure structure is designed according to the method of damage stage design. The safety of shield tunnel segment structure in inner lining and river bottom section is analyzed and evaluated. (4) according to the calculation results and the analysis of engineering measured data, the underground continuous wall in the working well protection structure of shield tunnel in oil and gas pipeline is given. Optimization design parameters of shield tunnel segment in inner lining and river bottom section.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TE973;U455.43

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