针对我国山地或丘陵地区广泛存在的地表为粘土覆盖层、土层以下为微风化岩层的地质条件，提出了环保型掏挖＋岩石锚杆复合型基础。界定了该复合型基础的适用范围，对其特点进行了阐述，并提出了今后主要的研究方向。通过2个试点工程的真型试验得到了其关键设计参数承载力发挥系数的取值，为其在输电线路工程中的推广应用提供参考。

According to the transmission line geological condition, which is the weather rock with a thin surface of clay covered in hilly area, an environmental friendly composite foundation combined with digging foundation and rock bolt foundation had been proposed. The applicable scope of the composite foundation was demarcated, its advantages were expatiated, as well as some proposals concerning its further development and application were put forward. At last, the real model tests of two pilot projects were carried out to obtain the value of the efficiency factor of bearing capacity, which could provide reference for the application of the composite foundation in transmission line projects.