王忠禹 佟智强 杨洪祥 宋林旭 王建伟 宋立东

摘 要：2019年7月9日，受强降雨影响，牡丹江市青梅山东坡发生一中型牵引式山体滑坡，总体积约30.43×104 m3，滑动距离约为20 m，滑坡前缘已延伸至鹤大高速公路边沟，鹤大高速公路长约400 m的路段受到威胁，潜在经济损失巨大。利用遥感、物探、无人机航测等手段研究青梅东山滑坡形态特征及形成机理，结果表明：青梅东山滑坡为牵引式中层滑坡体，呈塔式扇形外貌，由于地层岩性特征加之人工修路、开挖坡脚等诸多原因，致使坡体稳定性失衡，从而发生滑坡。

关键词：滑坡成因;猴石沟组砂岩;灾害演化趋势;牵引式滑坡

Abstract：On July 9， 2019， a medium-sized traction landslide occurred at the East slope of Qingmei mountain， Mudanjiang city affected by heavy rainfall， with a total volume of about 30.43 × 104 m3 and a sliding distance of about 20 meters. The landslide reached the side ditch of Heda expressway threatening an area of with a length of about 400 m of Heda expressway and resulting in huge potential economic losses. The landslide form and formation mechanism of this  landslide are studied by means of remote sensing， geophysical prospecting and UAV aerial survey. It is concluded that this landslide is a traction middle-layer landslide with a tower-shaped fan shape. Due to the formation lithology characteristics and many original reasons such as road construction and excavation at the foot of the slope， the slope stability is disturbed， and thus landslide occurs.

Keyword： landslide genesis; Houshigou formation sandstone; disaster evolution trend; traction landslide

滑坡體位于牡丹江市鹤大高速公路桦林—铁岭河段青梅山东坡，地理坐标为东经：129°41'17.30"，北纬：44°36'55.91"。经过现场勘查，滑坡体可见多处拉张裂缝，裂缝宽度0.05～0.20 m，滑坡壁向下延伸倾角变缓并与滑坡体滑动面相连，形成的封闭洼地宽度约3.2～20.4 m，与此同时在滑坡体前缘高速公路西侧约15 m远处发现滑坡鼓丘，高约2.3 m，长度约42.6 m。滑坡壁上可见垂向擦痕。调查过程中，首先利用遥感、无人机、航拍和航测等手段将滑坡体整体形态与外部边界进行圈定，进而通过钻探和物探手段相结合的方式查证并推断出该滑坡主滑断面及其埋深情况，为下一步工作部署打好基础。调查显示滑体地层岩性为白垩系下统猴石沟组（K1h）砂岩、含砾砂岩和泥岩互层，滑体整体透水性较强，而滑动带低层为粉砂质泥岩，其透水能力差，遇水湿滑，此类特征均有利于滑坡产生，而且该滑坡由于修筑道路、开挖坡脚导致斜坡体前缘应力缺失、稳定性遭到破坏，加之连夜暴雨渗透台体，加重滑坡质量，最终导致滑坡产生。……