本文選題：TBM解困 + 凍結(jié)法��； 參考：《中國礦業(yè)大學(xué)》2014年碩士論文

【摘要】：本文以甘肅省引洮供水一期工程TBM解困工程為背景，采用數(shù)值模擬、物理試驗(yàn)、現(xiàn)場實(shí)測相結(jié)合的方法，對形成的豎直、水平雙向凍結(jié)溫度場發(fā)展變化規(guī)律進(jìn)行研究。 首先，根據(jù)物理模擬試驗(yàn)的結(jié)果，合理調(diào)整土體熱物理參數(shù)，進(jìn)行雙向凍結(jié)溫度場發(fā)展變化規(guī)律的數(shù)值模擬研究。并且，對實(shí)際工況下的凍結(jié)溫度場發(fā)展變化情況、控制截面的交圈情況進(jìn)行了預(yù)測，確定了雙向凍結(jié)模型的薄弱位置；研究了水平豎直凍結(jié)管間距、提前凍結(jié)時間兩個因素對薄弱交界面凍結(jié)壁厚度的影響規(guī)律；發(fā)現(xiàn)了凍結(jié)溫度場趨于穩(wěn)定后平均溫度與凍結(jié)管外壁溫度的比值k、凍結(jié)壁厚度E的特性。 其次，根據(jù)初步數(shù)值模擬結(jié)果，合理設(shè)計(jì)物理模擬試驗(yàn)系統(tǒng)。通過物理模擬試驗(yàn)，研究了溫度場發(fā)展變化規(guī)律。得到的結(jié)論與數(shù)值模擬實(shí)驗(yàn)結(jié)果一致。 另外，通過現(xiàn)場實(shí)測對凍結(jié)溫度場進(jìn)行研究，得到了溫度變化曲線，分析了實(shí)際工況下溫度場發(fā)展變化規(guī)律。 最后，對數(shù)值模擬與物理模擬實(shí)驗(yàn)、數(shù)值模擬與現(xiàn)場實(shí)測的測溫孔溫度、特征面溫度分布分別進(jìn)行了對比，分析了由于數(shù)值模擬模型假定參數(shù)選取上存在的偏差，并對物理模擬試驗(yàn)提出了改進(jìn)優(yōu)化的思路。通過3種研究手段所得結(jié)果的相互驗(yàn)證，得到了水平與豎直雙向凍結(jié)溫度場發(fā)展變化規(guī)律，預(yù)測了工程中凍結(jié)壁交圈的時間。所得結(jié)論具有科學(xué)性、準(zhǔn)確性，，對類似工程具有指導(dǎo)意義。
[Abstract]:Based on the TBM project of water diversion and water supply in Gansu Province, this paper studies the development and variation of vertical, horizontal and bidirectional freezing temperature field by means of numerical simulation, physical test and field measurement. Firstly, according to the results of physical simulation test, the thermal physical parameters of soil are adjusted reasonably, and the numerical simulation study on the development and variation of bidirectional freezing temperature field is carried out. Furthermore, the development and variation of freezing temperature field under actual working conditions and the intersection of control section are predicted, the weak position of the bi-directional freezing model is determined, and the horizontal vertical freezing tube spacing is studied. The influence of two factors of early freezing time on the thickness of the freezing wall at the weak interface is studied, and the characteristics of the freezing wall thickness E and the ratio of the average temperature to the outside wall temperature of the freezing tube after the freezing temperature field becomes stable are found. Secondly, according to the preliminary numerical simulation results, the physical simulation test system is designed reasonably. The development and variation of temperature field are studied by physical simulation test. The results are in agreement with the numerical simulation results. In addition, the freezing temperature field is studied by field measurement, and the curve of temperature change is obtained, and the law of development of temperature field under actual working condition is analyzed. Finally, the numerical simulation and physical simulation experiments, numerical simulation and field measurement of the temperature of the hole temperature, characteristic surface temperature distribution were compared, the analysis of the numerical simulation model on the basis of the selection of the parameters of the bias. The idea of improving optimization for physical simulation test is also put forward. Through the mutual verification of the results obtained from three kinds of research methods, the development and variation law of horizontal and vertical bidirectional freezing temperature field is obtained, and the time of freezing wall intersection in engineering is forecasted. The conclusions are scientific and accurate, and have guiding significance for similar projects.
【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】：2014
【分類號】：TV554

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