| 冲孔灌注桩桩孔纠偏预防技术研究及应用 |
| 投稿时间：2021-05-16 修订日期：2021-07-22 点此下载全文 |
| 引用本文：蒋凯,邓宇,孟宝华,等.冲孔灌注桩桩孔纠偏预防技术研究及应用[J].钻探工程,2022,49(1):153-159.JIANG Kai,DENG Yu,MENG Baohua,et al. Correction and prevention of deviation in impact drilling of cast-in-place pile holes[J]. Drilling Engineering, 2022,49(1):153-159. |
| 摘要点击次数: 1059 |
| 全文下载次数: 601 |
|
|
| 中文摘要:冲孔灌注桩虽然在各类地层都具有广泛的适用性，但是在复杂地质条件下，极易发生偏孔。结合某高层建筑冲孔灌注桩施工中频繁偏孔的情况，对冲孔过程中的偏孔问题进行全面分析研究。以桩孔纠偏预防为目标，从应对孤石和斜硬岩层2个方面来针对性进行研究，应对孤石时，合理控制钻头、冲程及冲孔频率；应对斜硬岩层时，研究了钻头增厚硬质合金块改进技术。经现场应用，有效地避免了偏孔的产生。 |
| 中文关键词:冲孔灌注桩 孤石 斜硬岩层 偏孔 纠偏预防 |
| |
| Correction and prevention of deviation in impact drilling of cast-in-place pile holes |
|
|
| Abstract:Although impact drilled cast-in-place piles have wide applicability in all kinds of strata， holes are prone to deviat under complex geological conditions. In view of frequent deviation of holes in the construction of impact drilled cast-in-place piles for a high-rise building， hole deviation in the impact drilling process is comprehensively analyzed and studied. With hole deviation correction and prevention as the subject of study， research was carried out for two specific cases： deflection from solitary stones and dipped hard rock stratum. For solitary stones， the bit， impact stroke and frequency were properly controlled； for dipped hard rock stratum， increase of the thickness of the TC chips was studied for the bit. Field application demonstrated that hole deviation was effectively avoided. |
| keywords:impact drilled cast-in-place pile solitary stone dipped hard rock stratum deviated hole deviation correction and prevention |
| 查看全文 查看/发表评论 下载PDF阅读器 |
