【摘要】：近年來(lái),我國(guó)基礎(chǔ)設(shè)施建設(shè)步伐不斷加快,越來(lái)越多的隧道建設(shè)工程采用盾構(gòu)法施工,尤其是水下隧道工程。然而,在盾構(gòu)隧道施工過(guò)程中,管片結(jié)構(gòu)經(jīng)常出現(xiàn)上浮、錯(cuò)臺(tái)、開(kāi)裂現(xiàn)象。本文在國(guó)內(nèi)外有關(guān)研究現(xiàn)狀的基礎(chǔ)上,以衡陽(yáng)市合江套湘江隧道工程為背景,采用MIDAS-GTS NX軟件對(duì)盾構(gòu)施工階段建模分析,研究施工荷載作用下管片襯砌結(jié)構(gòu)的力學(xué)響應(yīng)規(guī)律。并對(duì)在管片結(jié)構(gòu)上浮、錯(cuò)臺(tái)、開(kāi)裂現(xiàn)象進(jìn)行機(jī)理分析,總結(jié)其引發(fā)因素,提出相應(yīng)控制對(duì)策。全文主要研究?jī)?nèi)容及成果如下:(1)通過(guò)MIDAS-GTS NX軟件進(jìn)行建模,研究施工荷載作用下管片襯砌結(jié)構(gòu)的力學(xué)響應(yīng)。隨著注漿壓力的增加,襯砌管片產(chǎn)生的水平和豎向位移均相應(yīng)增加。隨著千斤頂推力的增加,管片的水平和豎向位移均會(huì)增加,但不明顯。管片襯砌環(huán)拱頂和拱底產(chǎn)生了較大的擠壓變形,拱腰處也有相應(yīng)的水平變形;壓應(yīng)力最大處均位于拱腰位置。(2)對(duì)管片結(jié)構(gòu)上浮現(xiàn)象進(jìn)行機(jī)理分析,通過(guò)監(jiān)測(cè)數(shù)據(jù)總結(jié)了管片上浮規(guī)律:隨著時(shí)間增加,漿液的黏滯阻力不斷增大,上浮速度逐漸減少;管片襯砌環(huán)上浮的大部分位移均在漿液初凝時(shí)間以?xún)?nèi)完成;在初凝后的一段時(shí)間內(nèi),上浮量值幅度較小,最終上浮量趨于穩(wěn)定值。(3)對(duì)管片結(jié)構(gòu)錯(cuò)臺(tái)機(jī)理進(jìn)行分析,總結(jié)了管片結(jié)構(gòu)錯(cuò)臺(tái)的引發(fā)因素。推導(dǎo)出了注漿過(guò)程中單一管片錯(cuò)臺(tái)量的計(jì)算公式。單一管片錯(cuò)臺(tái)公式表明:(1)注漿壓力越大,單一管片錯(cuò)臺(tái)量越大;(2)螺栓彎曲剛度較大的管片,產(chǎn)生較小的錯(cuò)臺(tái)量。(3)螺栓與螺栓孔之間的間隙越大時(shí),發(fā)生錯(cuò)臺(tái)的管片對(duì)應(yīng)的錯(cuò)臺(tái)量就越大。由此,預(yù)先確定錯(cuò)臺(tái)量的大小,對(duì)控制管片錯(cuò)臺(tái)現(xiàn)象具有重要的實(shí)踐意義。
[Abstract]:In recent years, the pace of infrastructure construction in China has been speeding up. More and more tunnel construction projects use shield method, especially underwater tunnel construction. However, in the shield tunnel construction process, segment structure often appears floating, staggered, cracking phenomenon. On the basis of the domestic and foreign research status, taking the Heijiang Suaxiang River Tunnel Project in Hengyang City as the background, this paper uses the MIDAS-GTS NX software to model and analyze the shield construction stage, and studies the mechanical response law of the segment lining structure under the construction load. The mechanism of floatation, stagger and cracking in segment structure is analyzed, and the initiation factors are summarized, and the corresponding control measures are put forward. The main research contents and results are as follows: (1) the mechanical response of segment lining structure under construction load is studied by modeling with MIDAS-GTS NX software. With the increase of grouting pressure, the horizontal and vertical displacement of lining segment increases accordingly. With the increase of Jack thrust, the horizontal and vertical displacement of the segment will increase, but not obvious. The segment lining ring arch roof and bottom produced the big extrusion deformation, the arch waist also has the corresponding horizontal deformation, the maximum compressive stress is located in the arch waist position. (2) the mechanism analysis of the floating phenomenon of the segment structure is carried out. According to the monitoring data, the floating law of the segment is summarized: with the increase of time, the viscosity resistance of the slurry increases and the floating velocity decreases gradually, and most of the displacements of the segment lining ring are completed within the initial setting time of the slurry; Within a period of time after initial setting, the amplitude of floating value is small, and finally the floatation value tends to be stable. (3) the mechanism of segment structure stagger is analyzed, and the initiation factors of segment structure fault table are summarized. A formula for calculating the stagger of a single segment during grouting is derived. The single segment stagger formula shows: (1) the greater the grouting pressure, the greater the single segment stagger; (2) the larger the bending stiffness of the bolt, the smaller the stagger. (3) the larger the gap between the bolt and the bolt hole, The greater the number of staggered segments corresponding to the occurrence of the stagger. Therefore, it is of great practical significance to determine the amount of stagger in advance to control the stagger phenomenon of segment.
【學(xué)位授予單位】：湖南科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：U455.43

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張君;趙林;周佳媚;劉歡;張遷;;盾構(gòu)隧道管片上浮的機(jī)制研究[J];鐵道標(biāo)準(zhǔn)設(shè)計(jì);2016年10期

2 董賽帥;楊平;姜春陽(yáng);王亦玄;;盾構(gòu)隧道管片上浮機(jī)理與控制分析[J];地下空間與工程學(xué)報(bào);2016年01期

3 周濟(jì)民;何川;肖明清;宋洪江;;獅子洋水下盾構(gòu)隧道襯砌結(jié)構(gòu)受力的現(xiàn)場(chǎng)測(cè)試與計(jì)算分析[J];鐵道學(xué)報(bào);2012年07期

4 魏綱;洪杰;魏新江;;盾構(gòu)隧道施工階段管片上浮的力學(xué)分析[J];巖石力學(xué)與工程學(xué)報(bào);2012年06期

5 葉飛;何川;王士民;;盾構(gòu)隧道施工期襯砌管片受力特性及其影響分析[J];巖土力學(xué);2011年06期

6 杜闖東;王坤;;軟弱富水地層大直徑泥水盾構(gòu)管片上浮與錯(cuò)臺(tái)分析[J];隧道建設(shè);2011年02期

7 范昭平;韓月旺;方忠強(qiáng);;盾構(gòu)壁后注漿壓力分布計(jì)算模型[J];公路交通科技;2011年03期

8 吳坤;欒文偉;;盾構(gòu)法施工中隧道管片開(kāi)裂原因分析及應(yīng)對(duì)措施[J];市政技術(shù);2011年02期

9 皮景坤;趙運(yùn)臣;;盾構(gòu)隧道管片上浮與對(duì)策綜述[J];隧道建設(shè);2009年06期

10 彭飛;田文杰;;盾構(gòu)隧道管片開(kāi)裂原因分析及應(yīng)對(duì)措施[J];建筑技術(shù);2009年11期

相關(guān)博士學(xué)位論文 前1條

1 葉飛;軟土盾構(gòu)隧道施工期上浮機(jī)理分析及控制研究[D];同濟(jì)大學(xué);2007年

相關(guān)碩士學(xué)位論文 前2條

1 段鋒;盾構(gòu)地鐵管片襯砌結(jié)構(gòu)施工階段力學(xué)行為及選型技術(shù)研究[D];安徽理工大學(xué);2012年

2 丁祖德;連拱隧道動(dòng)態(tài)施工力學(xué)效應(yīng)分析及優(yōu)化[D];長(zhǎng)沙理工大學(xué);2008年

，

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