本文選題：盾構(gòu)法 + 隧道�。� 參考：《西安工業(yè)大學(xué)》2017年碩士論文

【摘要】：城鄉(xiāng)一體化進(jìn)程的逐步加快導(dǎo)致各大城市人口激增,城市交通面臨嚴(yán)峻挑戰(zhàn)。為解決城市的交通壓力,地鐵建設(shè)勢(shì)在必行。盾構(gòu)法以其施工安全、操作便捷等優(yōu)勢(shì),得到全面的推廣與應(yīng)用。但此法施工會(huì)引發(fā)地層損失,嚴(yán)重時(shí),則會(huì)造成地表塌陷、管線破裂、墻體裂縫等不良現(xiàn)象,影響周圍環(huán)境。本文以西安地鐵A站到B站區(qū)間隧道盾構(gòu)施工為背景,對(duì)盾構(gòu)掘進(jìn)引發(fā)的地表沉降進(jìn)行了分析。首先總結(jié)已有研究成果,對(duì)現(xiàn)場(chǎng)地表沉降觀測(cè)數(shù)據(jù)進(jìn)行梳理;然后利用有限元軟件MIDAS/GTS模擬盾構(gòu)掘進(jìn)施工工藝,得出隧道開(kāi)挖完成后的沉降數(shù)據(jù),并結(jié)合現(xiàn)場(chǎng)地質(zhì)條件、設(shè)計(jì)情況及施工參數(shù)等分析隧道盾構(gòu)法施工引起地表沉降的一般規(guī)律和影響沉降值大小的因素。通過(guò)優(yōu)化施工參數(shù)以及施工方案,提出控制地表沉降的有效措施。論文研究得出:(1)隧道上方覆土厚度對(duì)地表沉降有明顯的影響,沉降量隨著覆土厚度的增大而減小。在相同的覆土厚度下,埋深越大,地層的橫向最大沉降量越大。(2)縱向地表沉降受掘進(jìn)壓力的影響較大,沉降量隨著掘進(jìn)壓力的增大而減小。(3)采用等代層來(lái)模擬盾尾注漿時(shí),等代層的彈性模量取值對(duì)地表沉降影響較小,而等代層的厚度對(duì)地表沉降有顯著影響。(4)雙線隧道施工時(shí),不同的開(kāi)挖方式所引起的地表沉降量相差甚微。先左線、后右線的開(kāi)挖方式由于沉降疊加效果,使得兩隧道中心沉降量不等。
[Abstract]:The accelerating process of urban and rural integration has led to a sharp increase in population in major cities, and urban transportation is facing severe challenges. In order to solve the traffic pressure, subway construction is imperative. The shield method has been popularized and applied in an all-round way because of its advantages of safe construction and convenient operation. However, the construction of this method will cause formation losses, if serious, will cause surface collapse, pipeline rupture, wall cracks and other adverse phenomena, affecting the surrounding environment. In this paper, the ground subsidence caused by shield tunneling is analyzed under the background of shield tunneling between station A and station B of Xi'an subway. Firstly, summarizing the existing research results, combing the observation data of ground surface settlement, then using the finite element software Midas / GTS to simulate the construction technology of shield tunneling, the settlement data after tunnel excavation is obtained, and combined with the field geological conditions, The general law of ground subsidence caused by shield tunneling method and the factors influencing the settlement value are analyzed. Through optimizing construction parameters and construction scheme, the effective measures to control surface subsidence are put forward. In this paper, it is concluded that the overlying soil thickness over the tunnel has an obvious effect on the surface subsidence, and the settlement decreases with the increase of the overlying soil thickness. Under the same overlying soil thickness, the greater the buried depth, the greater the maximum horizontal settlement of the stratum. (2) the longitudinal surface subsidence is greatly affected by the tunneling pressure, and the settlement decreases with the increase of the tunneling pressure, and the equivalent layer is used to simulate the shield tail grouting. The elastic modulus of the same generation layer has little influence on the surface settlement, while the thickness of the same generation layer has a significant effect on the surface settlement. Because of the settlement superposition effect, the settlement of the center of the two tunnels varies from the left line to the second right line.
【學(xué)位授予單位】：西安工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U455.43;U231.3

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