ISSN 1000-3665 CN 11-2202/P

    大足石刻卧佛区域导水裂隙的高密度电阻率动态监测研究

    Dynamic monitoring of water-conducting fractures in reclining buddha area of dazu rock carvings using electrical resistivity tomography

    • 摘要: 为解决大足石刻宝顶山卧佛区域导水裂隙渗水病害突出、传统勘察手段存在局限的问题,揭示导水裂隙空间分布特征及地下水入渗过程,本研究采用高密度电阻率法结合多参数监测,对该区域开展长期动态监测,同步采集相关环境水文与气象数据,按降雨量划分为旱、雨两季进行对比分析。结果表明,卧佛区域发育2处主要导水裂隙带,1#裂隙带(地面以下3~5 m)对偶发降雨响应敏感,呈现短期波动特征;2#裂隙带(地面以下2~12 m)为重要优势通道之一,对雨季持续性降雨呈持续性响应。大气降水对地下水的补给存在数天(约3~5 d量级)的滞后效应,且深度越大滞后性越显著。本研究刻画了导水裂隙带空间分布特征,揭示不同埋深裂隙对旱雨季降水的差异化响应规律,为大足石刻卧佛区域水害防治及同类石窟文物保护提供了科学依据与技术支撑。

       

      Abstract: To address seepage issues caused by water-conducting fractures in the Reclining Buddha area of Baoding Mountain at the Dazu Rock Carvings, and to overcome the limitations of traditional survey methods in characterizing such features, this study employed electrical resistivity tomography (ERT) combined with multi-parameter approach for long-term monitoring. Hydrological and meteorological data were collected simultaneously and classified into dry and wet seasons based on precipitation levels to facilitate comparative analysis. The results revealed two water-conducting fracture zones in the study area. Fracture Zone 1, located 3−5 m below ground surface, was sensitive to rainfall and exhibited short-term fluctuations. Fracture Zone 2, extending from 2 to 12 m in depth, served as one of the main preferential pathways and showed a sustained response to continuous rainfall during the rainy season. Groundwater recharge exhibited a lag effect of approximately 3 to 5 days following precipitation, with the delay increasing with depth. This study characterized the spatial distribution of the water-conducting fracture zones and elucidated the patterns of groundwater migration, providing a scientific basis and technical support for water seepage control in the Reclining Buddha area of the Dazu Rock Carvings, as well as for the conservation of similar cave cultural relics.

       

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