后注浆灌注桩作为一种桩基规范推荐采用的新型桩基础型式，在民用建筑领域应用广泛。由于缺少理论支持和实践应用，尚未在输电线路工程中直接应用。对输电线路领域中后注浆灌注桩的增强机理、设计计算、注浆布置、工艺流程、施工设备、人工材料等进行了实验研究，提出在上拔荷载和水平力荷载作用下后注浆灌注桩的计算方法，并对后注浆灌注桩的主要优点、适用范围、经济性等进行了分析与比较。

Post-grouting pile has been widely applied in the field of civil building, as a new type of pile foundation recommended in technical code for pile foundations. However, it could not be used in transmission line directly due to the lack of theoretical parameters and practical application. This paper investigated the post-grouting piles used in the field of transmission line, such as strengthening mechanism, design calculation, grouting layout, technological process, construction equipment, artificial material and so on. The calculation method was suggested for the post-grouting pile under uplifting load and horizontal load. And the main advantages, application scope and economy of post-grouting piles were analyzed and compared.