In order to study the degradation characteristics of greenschist under hydrochemical action and its disaster-causing mechanism in slope, greenschist samples were collected on a slope in Lianyungang City, Jiangsu Province, China. X-ray diffraction and scanning electron microscope were used to test the samples. It was found that the microscopic mineral composition and structural composition of greenschist have sufficient reaction conditions with hydrochemical solution. Through indoor direct shear experiments, the deterioration characteristics of greenschist physical and mechanical properties were respectively explored. In the first 15 days of the action of two kinds of water chemical solutions, the physical and mechanical parameters of greenschist changed greatly, dry density decreased by 1.7%, void ratio increased by 19.1%, cohesion decreased by 40%, and internal friction angle decreased by 20.7%. With the increase of time, the influence of water chemical solution decreased, and the influence of acid solution on greenschist was significantly greater than that of high concentration salt solution. Combined with the topographic map and section map of the slope, the model of the slope with greenschist interlayer is established, and the stability of the slope under two kinds of hydrochemical environment is analyzed. It is found that the slope mainly slides along the greenschist interlayer, and the maximum horizontal displacement occurs at the toe of the slope. Hydrochemical solution reduces the safety factor of the slope about 0.2, resulting in the increase of the upper landslide displacement and the change of the failure sequence.

为研究绿片岩在水化学作用下的降解特性及其在坡面的致灾机制，在江苏省连云港市某坡面采集了绿片岩样品。X射线衍射和扫描电子显微镜用于测试样品。发现绿片岩的微观矿物组成和结构组成与水化学溶液有充分的反应条件。通过室内直剪试验，分别探讨了绿片岩物理力学性能的劣化特征。两种水化学溶液作用的前15天，绿片岩的物理力学参数变化较大，干密度下降1.7%，孔隙比上升19.1%，内聚力下降40%，内摩擦角下降20.7%。随着时间的增加，水化学溶液的影响减小，酸溶液对绿片岩的影响明显大于高浓度盐溶液。结合边坡地形图和剖面图，建立了绿片岩夹层边坡模型，分析了两种水化学环境下边坡的稳定性。发现斜坡主要沿绿片岩夹层滑动，最大水平位移发生在坡脚。水化学溶液使边坡安全系数降低约0.2，导致上部滑坡位移增加，破坏顺序发生变化。内摩擦角降低20.7%。随着时间的增加，水化学溶液的影响减小，酸溶液对绿片岩的影响明显大于高浓度盐溶液。结合边坡地形图和剖面图，建立了绿片岩夹层边坡模型，分析了两种水化学环境下边坡的稳定性。发现斜坡主要沿绿片岩夹层滑动，最大水平位移发生在坡脚。水化学溶液使边坡安全系数降低约0.2，导致上部滑坡位移增加，破坏顺序发生变化。内摩擦角降低20.7%。随着时间的增加，水化学溶液的影响减小，酸溶液对绿片岩的影响明显大于高浓度盐溶液。结合边坡地形图和剖面图，建立了绿片岩夹层边坡模型，分析了两种水化学环境下边坡的稳定性。发现斜坡主要沿绿片岩夹层滑动，最大水平位移发生在坡脚。水化学溶液使边坡安全系数降低约0.2，导致上部滑坡位移增加，破坏顺序发生变化。水化学溶液的影响减小，酸溶液对绿片岩的影响明显大于高浓度盐溶液。结合边坡地形图和剖面图，建立了绿片岩夹层边坡模型，分析了两种水化学环境下边坡的稳定性。发现斜坡主要沿绿片岩夹层滑动，最大水平位移发生在坡脚。水化学溶液使边坡安全系数降低约0.2，导致上部滑坡位移增加，破坏顺序发生变化。水化学溶液的影响减小，酸溶液对绿片岩的影响明显大于高浓度盐溶液。结合边坡地形图和剖面图，建立了绿片岩夹层边坡模型，分析了两种水化学环境下边坡的稳定性。发现斜坡主要沿绿片岩夹层滑动，最大水平位移发生在坡脚。水化学溶液使边坡安全系数降低约0.2，导致上部滑坡位移增加，破坏顺序发生变化。结合边坡地形图和剖面图，建立了绿片岩夹层边坡模型，分析了两种水化学环境下边坡的稳定性。发现斜坡主要沿绿片岩夹层滑动，最大水平位移发生在坡脚。水化学溶液使边坡安全系数降低约0.2，导致上部滑坡位移增加，破坏顺序发生变化。结合边坡地形图和剖面图，建立了绿片岩夹层边坡模型，分析了两种水化学环境下边坡的稳定性。发现斜坡主要沿绿片岩夹层滑动，最大水平位移发生在坡脚。水化学溶液使边坡安全系数降低约0.2，导致上部滑坡位移增加，破坏顺序发生变化。最大水平位移发生在坡脚。水化学溶液使边坡安全系数降低约0.2，导致上部滑坡位移增加，破坏顺序发生变化。最大水平位移发生在坡脚。水化学溶液使边坡安全系数降低约0.2，导致上部滑坡位移增加，破坏顺序发生变化。