旋挖钻机成孔开放式后注浆灌注桩施工工艺

Construction Technology of Rotary Bored Pile with Open Post-grouting

与其他成孔机型相比,旋挖钻机具有施工效率高、操作自动化程度高、垂直度控制好的优点。以实际工程为例,介绍了旋挖钻机成孔和灌注桩后注浆施工的工艺特点,工艺原理,工艺流程,操作要点,注意事项和质量控制措施。工程实践表明,灌注桩后注浆对于加固桩底沉渣及桩侧泥皮有非常好的效果,较大幅度提高了桩端、桩侧阻力。

Compared with other pore-forming machine types,rotary drilling rig has advantages such as high construction efficiency,high operation automation and verticality controlling easy.Based on some engineering,the author introduces technological characteristics,technological principle,technological process,operation points and quality control measures.Engineering practice shows that post-grouting of bored piles has good effect on strengthening piles and improving resistance of pile tip and pile side.