青岛胶州湾隧道工程施工地质条件研究

发布时间：2018-04-08 22:25

  本文选题：海底隧道　切入点：地质条件　出处：《铁道工程学报》2014年12期

【摘要】：研究目的:针对青岛胶州湾海底隧道跨度大,施工难度大,洞身地质条件复杂,施工影响因素不确定,风险亦大的特点,研究、分析洞身断层、涌水、围岩分级变更等对施工的影响,为保障施工安全提供科学依据。研究结论:(1)胶州湾海底隧道洞身构造和裂隙水分布,受不确定因素的影响存在差异;(2)研究、分析了洞身断层的具体位置和特征,找出了存在差异的原因:将断层所用的方位角误以为是走向方位角,造成了走向、倾向背离区域构造的异常现象;(3)通过对围岩变更数据的研究,绘制出围岩分级变更比例示意图,直观反映了施工前后围岩等级划分的变化:原Ⅲ级围岩所占的比例由53%变更调整为29%、Ⅳ级围岩的比例由28%变更调整为58%、Ⅴ级围岩的比例由10%变更调整为4%;(4)该研究成果可应用于隧道施工期间开展工程地质工作,实施动态设计,保障工程的质量、工期、安全和控制投资规模。
[Abstract]:Research purpose: in view of the characteristics of Qingdao Jiaozhou Bay subsea tunnel with large span, construction difficulty, complicated geological conditions, uncertain construction factors and great risk, the paper studies and analyzes the faults and water gushing of the tunnel body.The influence of the grade change of surrounding rock on the construction provides scientific basis for the safety of construction.Conclusion: (1) the structure and distribution of fissure water in Jiaozhou Bay subsea tunnel are different from each other by uncertain factors, and the specific location and characteristics of the fault are analyzed.The reasons for the difference are found: the fault azimuth is mistaken as the strike azimuth, which results in the anomaly of strike and tends to deviate from the regional structure.Drawing out the scale diagram of the grade change of surrounding rock,The change of grade of surrounding rock before and after construction is intuitively reflected: the proportion of original grade 鈪，

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