介绍了利用超长距离水平滤管排水降低地下水位,处治高速公路不稳定含碎石粘性土体上边坡的方法、施工控制要点及处治效果。通过超长距离水平滤管排水降低地下水位从而起到了降低滑坡体的推力,增加了土体粘聚力和内摩擦角,处治不稳定边坡的目的,并最大限度地减少了对环境的影响,避免了施工对公路正常营运的干扰,不仅经济合理,而且安全可靠,适用于多种复杂地形,具有较高的推广和应用价值。 Introduced the use of ultra-long-distance horizontal drainage pipe to reduce the water table, the treatment of highway instability on the slope of the clay-bearing clay method, construction control points and treatment effect. Through the drainage of ultra long distance horizontal pipe to reduce the water table, it can reduce the thrust of landslide body, increase the cohesion of soil and internal friction angle, and deal with the unstable slope and minimize the impact on the environment , To avoid the construction of the normal operation of the road interference, not only economical and reasonable, but also safe and reliable, suitable for a variety of complex terrains, with high promotion and application value.