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Study on the Countermeasures for Disposing of the Water-rich Section of Junmachang Tunnel

机译：君马岗隧道富含水分零件的对策研究

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摘要

During tunnel construction, the stability of tunnel surrounding rock caused by excavation of water-rich section has always been a major problem in the project. In this paper, the influx of water in the face of the excavation of the water-rich section of the Junmachang tunnel caused a large amount of water to be unable to be constructed. The on-site sampling was carried out to test the natural and saturated water conditions and the rock mass of the excavation section under the water-rich effect was determined. The characteristics of softening of body mechanics, in view of the lithology of the surrounding rocks of the tunnel and the water inrush of groundwater in the tunnels in the water-rich section of the tunnel, a combination of the grouting reinforcement of the advancement of the small face of the tunnel face, the radial grouting reinforcement around the tunnel, and the combination of a reasonable anti-drainage system were proposed to close the groundwater treatment. The results show that the deformation of the surrounding rock in the water-rich section of the tunnel after treatment is controlled within a reasonable deformation range, and the accumulative total settlement of the dome settlement and the cumulative convergence of the clearance are less than 1/3 of the reserved deformation. The water-rich section of the Junmachang has achieved good results in the combination of advanced small-vessel grouting reinforcement, peripheral radial grouting reinforcement, and the installation of a reasonable anti-drainage system, which has certain engineering application value.
机译：在隧道施工过程中，富裕的挖掘部分隧道围绕岩石的稳定性始终是该项目的主要问题。在本文中，面对挖掘的水的涌水的富含型隧道的挖掘段导致大量的水无法建造。进行现场取样以测试天然和饱和的水条件，并确定富含水效应下的挖掘部分的岩石质量。鉴于隧道周围岩石的岩性和隧道水富隧道地下水涌出的地下水涌出的特点，灌浆加固了隧道的岩石岩隧道面的小面，围绕隧道的径向灌浆加固，以及合理的防排水系统的组合，以关闭地下水处理。结果表明，处理后隧道水富岩中的周围岩石的变形在合理的变形范围内控制，圆顶沉降的累积总沉降和间隙的累积收敛程度小于1 / 3保留变形。 Junmachang的富含水的部分取得了良好的效果，即采访了先进的小船舶灌浆加固，外围径向灌浆加固和安装合理的防排水系统，具有一定的工程应用价值。

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