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首页> 外文会议>International Conference on Information Management, Innovation Management and Industrial Engineering;ICIII 2009 >Pre-supporting with Horizontal Piles of Jet Grouting in Weak Loess Tunnel
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Pre-supporting with Horizontal Piles of Jet Grouting in Weak Loess Tunnel

机译：黄土软弱隧道水平旋喷桩预支护。

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摘要

Considering the characteristics of surrounding rock of one highway tunnel discussed in this paper, pre-supporting with horizontal piles of jet grouting was used in portal section in order to improve the bearing capability of highway tunnel foundation. Diameter, length, longitudinal intervals of horizontal piles of jet grouting were determined preliminary based on calculation and references of some other projects. According to the geological conditions of surrounding rock, different water cement ratios, pressures of jet grouting, velocities of lifting and other construction parameters were put to use to large-scale field test. Diameter, length, 3 d and 28 d compressive strength of all test piles were checked, on which pre-design were adjusted and design indexes, construction parameters were get. Engineering application has proved the strong adaptability and maneuverability, and bearing capability and stability of highway tunnel foundation were improved through this method, therefore, this paper can be used for reference in design and construction of highway tunnel in weak loess.
机译：考虑到本文所讨论的某条公路隧道的围岩特性，在门户段采用水平桩旋喷预支护，以提高公路隧道基础的承载力。在计算和参考其他一些项目的基础上，初步确定了水平旋喷桩的直径，长度，纵向间隔。根据围岩的地质条件，采用不同的水灰比，喷射注浆压力，起升速度等施工参数进行大规模现场试验。检查所有试桩的直径，长度，3 d和28 d抗压强度，并在此基础上进行预设计调整，并得出设计指标，施工参数。工程应用证明，该方法具有较强的适应性和可操作性，改善了公路隧道地基的承载力和稳定性，因此可为黄土公路隧道的设计和施工提供参考。

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