本文選題：盾構隧道　切入點：管片　出處：《武漢理工大學》2014年碩士論文　論文類型：學位論文

【摘要】：伴隨著我國經濟的高速發(fā)展，隧道工程在全國得到大規(guī)模的開發(fā)，越來越多的大型隧道工程開工建設，由于其施工工藝的優(yōu)勢，盾構隧道掘進的同時進行出渣操作，襯砌在盾構機內拼裝完成，隨后實施壁后注漿操作，盾構隧道技術對周圍土體的擾動小，對地層的沉降影響低，盾構法越來越受到設計者的青睞，越來越多的隧道工程采用盾構法施工。而管片，在盾構設計施工中至關重要，管片盾構隧道中起到支護和防護的作用，需要承擔土壓力、水壓力以及各種特殊壓力，其設計關乎到建筑成本和建筑安全。對管片的理論分析和優(yōu)化設計具有實際意義。而本文結合南京緯三路過江隧道工程，通過理論分析和數(shù)值模擬，對管片的受力進行研究，并且結合神經網絡和遺傳算法，對管片的設計進行了優(yōu)化分析。主要內容如下： （1）管片結構設計 論述了管片結構設計的相關理論基礎，闡明了盾構隧道管片間的接頭單元理論，詳細描述了管片設計所受到的相關荷載，并且介紹了管片設計中的計算方法，確定了研究管片的建模方式。通過對管片所在地形的分析和了解，，依據(jù)實際情況，計算了管片受到的相應荷載。 （2）討論管片優(yōu)化相關因素 基于有限元軟件，對管片進行了理論分析，在相同荷載及相同管片幾何條件下，探討了慣用計算法和梁-彈簧模型的差別。同時通過控制變量法，對管片的單一屬性，如管片長，管片寬，管片厚度等進行逐一分析，得到影響管片設計的相關因素。 （3）建立結構優(yōu)化設計方案 通過正交試驗，利用遺傳算法并且結合神經網絡對結構設計進行設計優(yōu)化。選取盾構隧道管片的幾個較為明顯的影響因素，管片數(shù)量，管片寬度，管片厚度，管片接頭剛度，管片接頭剛度，將其作為控制變量，將管片隧道的相對位移值作為控制條件，進行設計優(yōu)化。利用有限元軟件對管片的內力進行模擬計算分析，得到相應狀況下的管片受力分析。 （4）論證 將計算結果與原始設計對比，驗證優(yōu)化設計的正確性。討論得到相關經驗。
[Abstract]:With the rapid economic development of our country, the tunnel project has been developed on a large scale throughout the country, and more and more large-scale tunnel projects have been started. Because of the advantages of its construction technology, the shield tunneling is carried out at the same time. The lining is assembled in the shield machine, and then the backwall grouting operation is carried out. The shield tunnel technology has little disturbance to the surrounding soil and low influence on the ground settlement, so the shield method is more and more favored by the designers. More and more tunnel projects are constructed by shield method, and the segment is very important in shield design and construction. The shield tunnel plays a supporting and protective role in the segment shield tunnel, which needs to bear the earth pressure, water pressure and various special pressures. Its design is related to building cost and building safety. It has practical significance for theoretical analysis and optimization design of segments. In this paper, through theoretical analysis and numerical simulation, the stress of segments is studied in combination with the Nanjing Weijiang-crossing tunnel project. Combined with neural network and genetic algorithm, the design of segment is optimized and analyzed. The main contents are as follows:. Design of segment structure. This paper discusses the relevant theoretical basis of segment structure design, expounds the theory of joint element between segments of shield tunnel, describes in detail the relevant loads on segment design, and introduces the calculation method in segment design. Based on the analysis and understanding of the local shape of the segment, the corresponding load on the segment is calculated according to the actual situation. Discuss the relevant factors of segment optimization. Based on the finite element software, the theoretical analysis of the segment is carried out. Under the same load and the same segment geometry, the difference between the usual calculation method and the beam-spring model is discussed. At the same time, the single property of the segment is obtained by controlling the variable method. For example, the length, width and thickness of the segment are analyzed one by one, and the relevant factors affecting the design of the segment are obtained. To establish the optimal design scheme of the structure. Through orthogonal experiment, the structural design is optimized by genetic algorithm and neural network. The number of segments, the width of segment, the thickness of segment, the stiffness of segment joint are selected to influence the segment number of shield tunnel, the number of segments, the width of segment, the thickness of segment and the stiffness of segment joint. The stiffness of segment joint is taken as the control variable and the relative displacement of segment tunnel is taken as the control condition to optimize the design. The internal force of segment is simulated and analyzed by finite element software. The stress analysis of the segment in the corresponding condition is obtained. 4) argumentation. The results are compared with the original design to verify the correctness of the optimal design.
【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U455.43

【參考文獻】

相關期刊論文 前10條

1 胡如軍,朱偉,季亞平;盾構隧道管片設計參數(shù)的靈敏度分析[J];地下空間;2003年01期

2 朱偉,胡如軍,鐘小春;幾種盾構隧道管片設計方法的比較[J];地下空間;2003年04期

3 李圍,何川;地鐵單線盾構隧道管片襯砌合理厚度的探討[J];地下空間;2004年01期

4 曾東洋;何川;;盾構隧道襯砌結構內力計算方法的對比分析研究[J];地下空間與工程學報;2005年05期

5 嚴長征;張慶賀;王慎堂;;盾構隧道通、錯縫拼裝管片受力及變形比較[J];地下空間與工程學報;2007年04期

6 程小虎;;梁單元模擬管片接頭的盾構襯砌計算模型[J];地下空間與工程學報;2010年05期

7 蘇宗賢;何川;;盾構隧道管片襯砌內力分析的殼-彈簧-接觸模型及其應用[J];工程力學;2007年10期

8 吳學松 ,侍田田;地鐵工程施工技術縱覽[J];建筑機械化;2004年10期

9 謝卓雄;;盾構隧道殼—彈簧模型與梁—彈簧模型的比較[J];山西建筑;2007年23期

10 齊靜靜;徐日慶;王濤;;盾構隧道縱向結構剛度性狀研究[J];科技通報;2008年05期

相關博士學位論文 前1條

1 周濟民;水下盾構法隧道雙層襯砌結構力學特性[D];西南交通大學;2012年

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