本文關(guān)鍵詞：淺埋條件下超近距離立體交叉隧道施工力學(xué)行為及對(duì)策研究　出處：《西南交通大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 隧道 淺埋條件 超近距離 立體交叉 施工力學(xué) 施工對(duì)策

【摘要】：對(duì)于淺埋條件下超近距離立體交叉隧道的施工工程案例,目前國(guó)內(nèi)外已有一些工程實(shí)例,但是大部分解決方法是就事論事,無統(tǒng)一的施工標(biāo)準(zhǔn)可循�；谝陨媳尘�,本論文以長(zhǎng)沙西北下行聯(lián)絡(luò)線羅家一號(hào)隧道下穿新建杭長(zhǎng)正線曾家?guī)X一號(hào)隧道為工程背景,運(yùn)用理論分析及數(shù)值分析等技術(shù)手段,對(duì)淺埋條件下超近距離立體交叉隧道施工力學(xué)行為及施工對(duì)策進(jìn)行了系統(tǒng)研究,通過研究,得到如下成果：(1)以杭長(zhǎng)客運(yùn)專線羅家一號(hào)隧道為工程背景,提出了淺埋條件下超近距離立體交叉隧道施工關(guān)鍵技術(shù)：確定了淺埋條件下超近距離立體交叉隧道的施工順序、開挖方法、支護(hù)技術(shù)等。(2)提出以位移與襯砌應(yīng)力增量控制為準(zhǔn)則的淺埋條件下超近距離立體交叉隧道近接施工的影響分區(qū)標(biāo)準(zhǔn)。運(yùn)用理論分析、三維數(shù)值分析等手段,以位移與襯砌應(yīng)力增量為判別準(zhǔn)則,確定了淺埋條件下超近距離立體交叉隧道近接施工的影響分區(qū)標(biāo)準(zhǔn),即強(qiáng)影響區(qū)、弱影響區(qū)以及無影響區(qū)。(3)在選定的“先下后上”施工順序條件下,分析了“后修隧道”對(duì)“先修隧道’的影響范圍、影響程度以及兩個(gè)隧道結(jié)構(gòu)應(yīng)力的演變特征,確定了近接施工過程中控制的關(guān)鍵環(huán)節(jié)。目前,曾家?guī)X一號(hào)隧道與羅家一號(hào)隧道均已竣工,施工過程中監(jiān)理單位對(duì)交叉隧道施工進(jìn)行了全程監(jiān)控,對(duì)施工過程中的監(jiān)控量測(cè)資料進(jìn)行檢查,判定圍巖基本穩(wěn)定,且各個(gè)結(jié)構(gòu)尺寸滿足設(shè)計(jì)和規(guī)范要求。實(shí)踐證明本論文提出的在淺埋條件下、超近距離立體交叉隧道的超前支護(hù)措施、開挖方法、支護(hù)措施是可行的、安全的,其成功經(jīng)驗(yàn)可為今后類似工程的設(shè)計(jì)與施工提供借鑒。
[Abstract]:At present, there are some engineering examples at home and abroad for the construction cases of ultra-close distance cross tunnel under shallow burial condition, but most of the solutions are based on the subject matter. There is no uniform construction standard. Based on the above background, this paper takes Luojia No.1 Tunnel, the downlink line of northwestern Changsha, as the engineering background. By means of theoretical analysis and numerical analysis, the mechanical behavior and construction countermeasures of ultra-close distance cross tunnel under shallow burial conditions are studied systematically. The results are as follows: 1) taking Luojia No.1 Tunnel of Hangzhou long passenger dedicated Line as the engineering background. In this paper, the key technology of super close distance cross tunnel construction under shallow burial condition is put forward. The construction sequence and excavation method of super close distance cross tunnel under shallow burial condition are determined. The paper puts forward the influence zoning standard of super-close distance cross tunnel construction under shallow buried condition based on displacement and lining stress increment control. By means of three-dimensional numerical analysis and the criterion of displacement and lining stress increment, the influence zoning standard of super-close distance cross tunnel construction under shallow burial condition, that is, strong influence zone, is determined. Under the selected construction sequence of "first down and then up", the influence range of "post-repair tunnel" to "pre-repair tunnel" is analyzed. The degree of influence and the evolution characteristics of stress in the two tunnels have determined the key links in the process of construction. At present, both Zengjialing No. 1 Tunnel and Luojia No. 1 Tunnel have been completed. In the process of construction, the supervision unit carries on the whole process monitoring to the cross tunnel construction, carries on the inspection to the monitoring measurement data in the construction process, judges the surrounding rock to be basically stable. And each structure size meets the requirements of design and specification. The practice proves that the advanced support measures, excavation methods and support measures proposed in this paper are feasible and safe under the condition of shallow burying. The successful experience can be used for reference for the design and construction of similar projects in the future.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U455

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本文編號(hào)：1404183