硬质岩高边坡地下水实测研究

Field Research on Groundwater in High Slope of Hard Rock

硬质岩中赋含的裂隙水具有强烈的不均匀性和各向异性,通过打垂直观测孔来监测硬质岩高边坡地下水的动态变化往往较难取得理想结果。在综合分析中云台山路堑段反倾硬质岩高边坡的组成结构和地下水的补径排条件的基础上,采用在绿泥石片岩上部布置斜向观测孔,在观测孔测试段NE向裂隙分布密集的位置布置振弦式渗压计的观测方案来监测地下水动态。实测结果表明,该方案在中云台山路堑段边坡地下水动态监测中具有较好的适用性,对于硬质岩高边坡的地下水监测具有一定的指导意义。

Due to the fissure water contained in hard rock has strong unevenness and anisotropy,it is often difficult to obtain a satisfying result by drilling vertical observation wells to monitor the dynamic changes of the groundwater in high slope of hard rock.On the basis of the comprehensive analysis of composition and structure of the counter-tilt high slope of hard rock at the cutting section in Middle Yuntai Mountain and the recharge-runoff-discharge conditions of groundwater,the inclined observation wells were drilled in the upper part of the chlorite schist and the vibrating wire piezometers were set up at the locations where fissures densely distribute in NE of measuring section of observation wells to monitor the dynamic groundwater.The research results show that this solution is properly applicable to the dynamic monitoring of groundwater in the slope at the cutting section in Middle Yuntai Mountain and has some guiding significance for groundwater monitoring at the high hard rock slope.