發(fā)布時間：2018-11-20 15:10

【摘要】：目前,地鐵聯(lián)絡(luò)通道一般線間距為10~13m,運(yùn)用人工凍結(jié)法施工時多采用單側(cè)凍結(jié)的模式,且應(yīng)用技術(shù)相對成熟。由于長距離聯(lián)絡(luò)通道的特殊性,其所處位置的左、右線隧道間距較遠(yuǎn),采用凍結(jié)法施工時凍脹對隧道的影響不同于一般長度的聯(lián)絡(luò)通道。本文依托武漢機(jī)場線盤龍城站~宏圖大道站區(qū)間聯(lián)絡(luò)通道施工工程,考慮水平分期凍結(jié)情況,研究長距離聯(lián)絡(luò)通道凍結(jié)施工過程中主隧道襯砌的受力變形規(guī)律,對工程設(shè)計(jì)和安全施工具有極其重要的意義。首先,開展數(shù)值模擬研究。對典型參數(shù)及分期凍結(jié)情況下凍結(jié)壁的平均溫度和平均厚度進(jìn)行計(jì)算;對隧道襯砌的受力變形規(guī)律進(jìn)行了分析。此外,考慮凍結(jié)壁傾角、分期凍結(jié)時間差和兩側(cè)凍結(jié)壁交接面位置三個因素對凍脹的影響展開研究。其次,開展物理模擬試驗(yàn)研究。通過�；�設(shè)計(jì)對原型進(jìn)行縮比計(jì)算,設(shè)計(jì)模擬試驗(yàn)系統(tǒng);考慮分期凍結(jié)情況,分析長距離聯(lián)絡(luò)通道凍結(jié)施工過程中溫度場的變化規(guī)律,研究隧道襯砌受力變形的發(fā)展規(guī)律。最后,通過數(shù)值模擬與物理模擬試驗(yàn)的結(jié)果對比,綜合分析凍結(jié)施工中土體的溫度場及隧道襯砌的受力變形規(guī)律,并驗(yàn)證了數(shù)值模擬模型的可用性。本文的研究對長距離聯(lián)絡(luò)通道凍結(jié)工程的設(shè)計(jì)與施工具有重要的指導(dǎo)意義,為今后此類長距離聯(lián)絡(luò)通道凍結(jié)施工方法的應(yīng)用及推廣具有重要的意義。
[Abstract]:At present, the distance between the lines of the subway communication channel is 10 ~ 13m, and the method of artificial freezing is mostly used in the construction of one-side freezing, and the application technology is relatively mature. Because of the particularity of the long distance connection channel, the distance between the left and right tunnels is far, so the frost heaving influence on the tunnel is different from that of the normal length contact channel. In this paper, based on the construction project of the connection channel between the Panlong City Station and the Hongtu Avenue Station of Wuhan Airport Line, considering the freezing situation of horizontal stages, the deformation law of the main tunnel lining during the freezing construction of the long distance connection passage is studied. It is of great significance for engineering design and safe construction. Firstly, numerical simulation is carried out. The average temperature and thickness of freezing wall under typical parameters and freezing by stages are calculated, and the deformation law of tunnel lining is analyzed. In addition, the effects of freezing angle, phase freezing time difference and the joint position of two sides freezing wall on frost heave are studied. Secondly, physical simulation experiments are carried out. The simulation test system was designed by using the model design to calculate the shrinkage ratio of the prototype. Considering the freezing by stages, the variation law of temperature field during the freezing construction of the long distance connection passage was analyzed, and the development law of tunnel lining force and deformation was studied. Finally, by comparing the results of numerical simulation and physical simulation test, the temperature field of soil and the deformation of tunnel lining are comprehensively analyzed, and the availability of numerical simulation model is verified. The research in this paper is of great significance to the design and construction of the long distance connection channel freezing engineering, and it is of great significance for the application and popularization of this kind of long distance connection channel freezing construction method in the future.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U455.49;U451

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本文編號：2345241