深层入岩钻孔灌注桩干成孔作业下的后注浆技术的研究

Research on post grouting technique under dry hole forming operation of deep rock drilling cast-in-place pile

在极软岩的地质条件下,采用自创的新型注浆设备,通过不同入岩深度及成桩措施进行桩基施工,根据静载荷试验进行分析对比,得出入岩深度增加和后注浆对桩基沉降量的影响及自创注浆设备的实用性。

Under the geological condition of extremely soft rock,a new type of self-created grouting equipment is used to construct the pile foundation through different rock-entering depths and pile-forming measures.According to the analysis and comparison of static load test,the influence of the increase of rock-entering depth and post-grouting on the settlement of the pile foundation and the practicability of self-created grouting equipment are obtained.