王亚琼, 谢永利, 晏长根. 2008: 黄土公路隧道病害治理实例研究. 工程地质学报, 16(4): 557-562.
    引用本文: 王亚琼, 谢永利, 晏长根. 2008: 黄土公路隧道病害治理实例研究. 工程地质学报, 16(4): 557-562.
    WANG Yaqiong, XIE Yongli, YAN Changgen. 2008: DETECTION AND TREATMENT OF ROAD TUNNEL DISTRESSES IN LOESS mdash|A CASE STUDY. JOURNAL OF ENGINEERING GEOLOGY, 16(4): 557-562.
    Citation: WANG Yaqiong, XIE Yongli, YAN Changgen. 2008: DETECTION AND TREATMENT OF ROAD TUNNEL DISTRESSES IN LOESS mdash|A CASE STUDY. JOURNAL OF ENGINEERING GEOLOGY, 16(4): 557-562.

    黄土公路隧道病害治理实例研究

    DETECTION AND TREATMENT OF ROAD TUNNEL DISTRESSES IN LOESS mdash|A CASE STUDY

    • 摘要: 黄土物理力学性质相对较差,具有大孔隙、湿陷性强、强度低的特点,加之黄土区的地形地貌、地质条件比较复杂,导致黄土隧道修筑过程中病害较多。利用SIR2000型探地雷达、RSM-SY5非金属声波探测仪和BJSD-2型激光限界仪等多种方法对某黄土公路隧道病害进行了探测,探测表明隧道洞身出现环向和横向裂缝,衬砌厚度不足,局部地段存在集中涌水和渗漏水,根据探测结果对隧道病害成因进行了详细的分析。在此基础上结合黄土隧道的基本特征,有针对性地提出了锚喷加固、套衬加仰拱、套衬和下加固围岩3套病害治理方案。并利用数值模拟对隧道治理前后围岩稳定性和衬砌结构受力状态进行了分析,结果表明治理方案衬砌受力状态基本对称,结构的安全系数有较大的提高。

       

      Abstract: Physical and mechanical properties of loess are very poor. The loess has big aperture, strong wet subsidence, and low intensity. The complex and varied terrains and landforms of loess regions can result in a lot of disease of road tunnels in loess during construction. According to the characteristics of distresses in the road tunnel in Qijia mountain, the thickness, cavity distribution, crevice water were detected with geo-radar. Material of lining was nondestructively detected with sound locater. Limiting structure of the tunnel was detected with a circumscription apparatus. Based on detected results, causes of the distresses were analyzed. Three treatment schemes were put forward by slurry injection from the back of lining structure, lining reinforcement, treating the water proof system. Stability of surrounding rock and the state of forces of the lining structure were analyzed before and after the treatment. It is showed that the treatment scheme of the tunnel is feasible. Taken construction and cost estimate into account, an optimal scheme is obtained.

       

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