The strengthening mechanism, construction technological proceedings and the main points to be noticed in construction with post grouting technique are given.

介绍了影响泥浆护壁钻孔灌注桩单桩承载力的主要因素，后压浆技术的加固机理、施工工艺流程及施工要点。

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Based on the application of post grouting technique in the rigid pile composite foundation, the authors investigated the mechanism of the capacity increase of short rigid pile by this technique.

结合后注浆技术在刚性桩复合地基工程中的应用，探讨后注浆技术提高刚性短桩承载力的作用机理。

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Problem on the bearing capacity of cast-in-place pile influenced by the deposit at pile end and the mud hanged on pile shaft can be solved by the technique with the post grouting.

灌注桩后压浆技术解决了桩底沉淤和桩身泥皮影响灌注桩承载力的问题，使桩底、桩侧土得到了加固，从而大幅度提高了灌注桩的承载力，降低了桩的沉降量。

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