泥浆护壁钻孔灌注桩后压浆技术在许多地区都得到了广泛应用，但在不同地质条件下后压浆的形式及效果有所不同。本文通过工程实例介绍了岩溶地区后压浆钻孔灌注桩的施工情况，对该类地质条件下灌注桩施工中出现的泥浆漏失、充盈系数大、持力层判断困难等问题以及后压浆施工中的一些技术特点进行了分析和总结，提出了一些见解和体会。这对于类似的工程有一定的借鉴意义。 The post-grouting technique of bored cast-in-place bored piles has been widely used in many areas, but the form and effect of post-pressurization are different under different geological conditions. This paper describes the construction of post-grouting bored piles in karst areas through engineering examples. The problems such as mud loss, large filling factor, difficulty in determining the bearing layer and post-grouting construction appear in the construction of bored piles in this type of geological conditions. Some of the technical features in the analysis and summaries, put forward some insights and experience. This has some implications for similar projects.