【摘要】：地鐵隧道建設(shè)過(guò)程中的如何保證地層穩(wěn)定性是現(xiàn)在所研究的難題之一，地鐵建設(shè)引起的地層沉降、周圍土體失穩(wěn)、對(duì)周圍地下管線造成破壞、對(duì)地鐵開(kāi)挖周邊高聳建筑的不利影響等，是地鐵設(shè)計(jì)、施工所考慮的重要因素。隧道開(kāi)挖破壞了圍巖的原始應(yīng)力狀態(tài)，直接可能導(dǎo)致圍巖的破壞失穩(wěn)，因此，為了維持圍巖的穩(wěn)定狀態(tài)，，必須采取一定的預(yù)加固措施，不同的預(yù)加固技術(shù)適應(yīng)不同的工況，所以對(duì)特定條件下的地鐵預(yù)加固技術(shù)開(kāi)展研究具有很重要意義。 本文在充分查閱文獻(xiàn)的基礎(chǔ)上，結(jié)合西安地鐵一號(hào)線灑金橋～北大街區(qū)間暗挖段隧道的工程背景，利用大型有限元軟件Midas GTS建立數(shù)值計(jì)算模型，分別對(duì)無(wú)加固方案，錨桿注漿預(yù)加固，水平旋噴注漿預(yù)加固，管棚注漿預(yù)加固這四種工況進(jìn)行了模擬分析對(duì)比，根據(jù)這四種模擬方案的豎向位移和水平位移的比較得出，管棚注漿預(yù)加固是大斷面淺埋黃土地鐵隧道的合理預(yù)支護(hù)方式。 本文采用現(xiàn)場(chǎng)監(jiān)測(cè)數(shù)據(jù)和有限元數(shù)值模擬相結(jié)合的研究方法，將現(xiàn)場(chǎng)監(jiān)測(cè)數(shù)據(jù)和數(shù)值模擬所得出結(jié)果進(jìn)行對(duì)比，驗(yàn)證了數(shù)值模擬的適用性，也進(jìn)一步驗(yàn)證了西安地鐵一號(hào)線灑金橋～北大街區(qū)間隧道管棚超前支護(hù)這種施工設(shè)計(jì)方案的合理性，對(duì)類似工程有很重要的指導(dǎo)作用。
[Abstract]:How to ensure the formation stability in the construction of subway tunnel is one of the problems studied now. The ground settlement caused by the subway construction and the instability of the surrounding soil have caused damage to the surrounding underground pipeline. It is an important factor in subway design and construction that the unfavorable influence on the high-rise buildings around the subway excavation. Tunnel excavation destroys the original stress state of surrounding rock, which may directly lead to failure and instability of surrounding rock. Therefore, in order to maintain the stability of surrounding rock, certain pre-reinforcement measures must be taken and different pre-reinforcement techniques should be adopted to adapt to different working conditions. Therefore, it is of great significance to carry out research on subway pre-reinforcement technology under specific conditions. Based on the full reference of literature and the engineering background of the tunnel in the section of Shajin Bridge to North main Street of Xi'an Metro Line 1, this paper establishes a numerical calculation model by using the large-scale finite element software Midas GTS, respectively, for no reinforcement scheme. The four conditions of pre-reinforcement of bolt grouting, horizontal rotary grouting and pipe shed pre-reinforcement are analyzed and compared. According to the comparison of vertical displacement and horizontal displacement of the four simulation schemes, Pipe-shed grouting pre-reinforcement is a reasonable pre-supporting method for large-section shallow-buried loess subway tunnel. In this paper, the field monitoring data and finite element numerical simulation are used to compare the field monitoring data with the results obtained from the numerical simulation, and the applicability of the numerical simulation is verified. It also further verifies the rationality of the construction design scheme of the tunnel pipe shed advance support in the section of Shanjin Bridge to North main Street of Xi'an Metro Line 1, which is very important to the similar projects.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U231.3;U455.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 王金明;楊小禮;;淺埋暗挖地鐵隧道不同工法對(duì)地表沉降的影響[J];石河子大學(xué)學(xué)報(bào)(自然科學(xué)版);2008年04期

本文編號(hào)：2334249