雩山隧道斷層破碎帶穩(wěn)定性分析及治理方法
發(fā)布時間：2019-04-20 08:47
【摘要】：隧道施工時經(jīng)常遇到斷層破碎帶等復(fù)雜地質(zhì)問題,嚴(yán)重的可能造成重大人員和經(jīng)濟(jì)損失。本文結(jié)合雩山隧道的現(xiàn)場施工,開展了隧道穿越斷層破碎帶超前預(yù)報(bào)、穩(wěn)定性分析、監(jiān)控量測與處理措施的研究。分析成果為隧道穿越斷層破碎帶施工安全提供了技術(shù)指導(dǎo),為類似工程提供了理論依據(jù)和工程經(jīng)驗(yàn),具有較實(shí)用的工程價值。本文主要研究成果如下：(1)對隧道掌子面前方的斷層破碎帶開展了綜合超前地質(zhì)預(yù)報(bào),有效探明了斷層破碎帶發(fā)育的位置與規(guī)模,并且發(fā)現(xiàn)隧道前方圍巖破碎,存在軟弱夾層或含水,圍巖穩(wěn)定性較差。(2)管棚施工、超前小導(dǎo)管及超前錨桿在隧道穿越的斷層破碎帶治理中是十分有效的,通過合理的設(shè)計(jì)和精細(xì)的施工,對雩山隧道穿越的斷層破碎帶進(jìn)行了處理,監(jiān)測結(jié)果證明,管棚施工、超前小導(dǎo)管及超前錨桿在雩山隧道工程中的應(yīng)用,完全滿足設(shè)計(jì)要求。(3)對雩山隧道穿越斷層破碎帶段進(jìn)行數(shù)值模擬,計(jì)算結(jié)果表明隧道橫向應(yīng)力主要集中于隧道兩側(cè)的邊墻,方向朝向隧道內(nèi)側(cè),使得隧道邊墻向內(nèi)側(cè)擠壓,產(chǎn)生朝向內(nèi)側(cè)的位移；隧道豎向應(yīng)力主要集中于隧道拱頂和底板,方向朝向隧道內(nèi)側(cè),使得隧道拱頂產(chǎn)生下沉,底板隆起。施工時應(yīng)加強(qiáng)對這些部位的支護(hù)。(4)對雩山隧道穿越斷層破碎帶段進(jìn)行周邊收斂和拱頂下沉的監(jiān)測,沒有出現(xiàn)較大的變形。與計(jì)算結(jié)果相對比發(fā)現(xiàn),數(shù)值計(jì)算結(jié)果能夠近似的反映工程實(shí)際結(jié)果,但由于現(xiàn)場復(fù)雜的地質(zhì)條件,相關(guān)參數(shù)的簡化選取以及隧道模型不可能真正與實(shí)際隧道相同,模擬結(jié)果相對實(shí)際監(jiān)測結(jié)果有一定的偏差。但數(shù)值計(jì)算得到的隧道周邊位移變化趨勢與監(jiān)控量測結(jié)果接近,可以為修改斷層破碎帶處理方案提供一定的參考。
[Abstract]:During tunnel construction, complex geological problems such as fault rupture zone are often encountered, which may cause serious personnel and economic losses. In this paper, based on the site construction of Yushan tunnel, the advance prediction, stability analysis, monitoring measurement and treatment measures of tunnel crossing fault fracture zone have been carried out. The analysis results provide technical guidance for construction safety of tunnel crossing fault broken zone, provide theoretical basis and engineering experience for similar projects, and have practical engineering value. The main research results of this paper are as follows: (1) Comprehensive advance geological prediction is carried out on the fault fracture zone in front of the tunnel palm surface, and the location and scale of the fault fracture zone are proved effectively, and the surrounding rock in front of the tunnel is found to be broken. There is weak interlayer or water cut, and the stability of surrounding rock is poor. (2) the construction of pipe shed, the leading small pipe and the leading anchor rod are very effective in the treatment of the fracture zone through the tunnel, through reasonable design and fine construction, The fault fracture zone through Yushan tunnel is dealt with. The monitoring results show that the application of pipe shed construction, leading small pipe and lead anchor rod in Yushan tunnel project. The results show that the lateral stress of Yushan tunnel is mainly concentrated on the side walls on both sides of the tunnel, and the direction is toward the inner side of the tunnel, and the numerical simulation results show that the transverse stress of Yushan tunnel is mainly concentrated on the side walls on both sides of the tunnel. The side wall of the tunnel is extruded to the inside to produce the displacement toward the inside of the tunnel. The vertical stress of the tunnel is mainly concentrated on the roof and floor of the tunnel, facing the inner side of the tunnel, which leads to the settlement of the arch roof and the uplift of the bottom plate. During construction, the support of these parts should be strengthened. (4) the surrounding convergence and arch subsidence of Yushan tunnel crossing the fault fracture zone are monitored, and there is no large deformation. Compared with the calculated results, it is found that the numerical results can approximately reflect the actual engineering results, but due to the complex geological conditions in the field, the simplified selection of the relevant parameters and the tunnel model cannot really be the same as the actual tunnel. The simulation results have some deviation from the actual monitoring results. However, the variation trend of displacement around the tunnel obtained by numerical calculation is close to the result of monitoring and measurement, which can be used as a reference for modifying the treatment scheme of fault fracture zone.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U452.11;U455
本文編號：2461461
[Abstract]:During tunnel construction, complex geological problems such as fault rupture zone are often encountered, which may cause serious personnel and economic losses. In this paper, based on the site construction of Yushan tunnel, the advance prediction, stability analysis, monitoring measurement and treatment measures of tunnel crossing fault fracture zone have been carried out. The analysis results provide technical guidance for construction safety of tunnel crossing fault broken zone, provide theoretical basis and engineering experience for similar projects, and have practical engineering value. The main research results of this paper are as follows: (1) Comprehensive advance geological prediction is carried out on the fault fracture zone in front of the tunnel palm surface, and the location and scale of the fault fracture zone are proved effectively, and the surrounding rock in front of the tunnel is found to be broken. There is weak interlayer or water cut, and the stability of surrounding rock is poor. (2) the construction of pipe shed, the leading small pipe and the leading anchor rod are very effective in the treatment of the fracture zone through the tunnel, through reasonable design and fine construction, The fault fracture zone through Yushan tunnel is dealt with. The monitoring results show that the application of pipe shed construction, leading small pipe and lead anchor rod in Yushan tunnel project. The results show that the lateral stress of Yushan tunnel is mainly concentrated on the side walls on both sides of the tunnel, and the direction is toward the inner side of the tunnel, and the numerical simulation results show that the transverse stress of Yushan tunnel is mainly concentrated on the side walls on both sides of the tunnel. The side wall of the tunnel is extruded to the inside to produce the displacement toward the inside of the tunnel. The vertical stress of the tunnel is mainly concentrated on the roof and floor of the tunnel, facing the inner side of the tunnel, which leads to the settlement of the arch roof and the uplift of the bottom plate. During construction, the support of these parts should be strengthened. (4) the surrounding convergence and arch subsidence of Yushan tunnel crossing the fault fracture zone are monitored, and there is no large deformation. Compared with the calculated results, it is found that the numerical results can approximately reflect the actual engineering results, but due to the complex geological conditions in the field, the simplified selection of the relevant parameters and the tunnel model cannot really be the same as the actual tunnel. The simulation results have some deviation from the actual monitoring results. However, the variation trend of displacement around the tunnel obtained by numerical calculation is close to the result of monitoring and measurement, which can be used as a reference for modifying the treatment scheme of fault fracture zone.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U452.11;U455
【共引文獻(xiàn)】
相關(guān)期刊論文 前2條
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相關(guān)博士學(xué)位論文 前2條
1 李明;山嶺隧道與地下工程健康評價理論研究及應(yīng)用[D];西南交通大學(xué);2011年
2 肖寬懷;隧道超前預(yù)報(bào)地球物理方法及應(yīng)用研究[D];成都理工大學(xué);2012年
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