深厚填土区干成孔大直径灌注桩塌孔处理技术探讨

Discussion on Collapse Treatment Technology of Drilling Large Diameter Grouting Pile in Deep&Thick Filling Area with Dry-condition

深厚填土区域由于填土的孔隙率高强度低等特点,使得干作业成孔时经常出现塌孔问题。针对此类问题文章结合南京某渣土堆积体滑坡治理工程抗滑桩施工过程中塌孔问题的处理,分析了深厚填土区域大直径灌注桩干作业塌孔的原因并在工程实践的基础上,提出了综合处理方案,很好的解决了塌孔问题的发生,为类似地区处理塌孔问题提供了借鉴和参考。

Due to the characteristics of high porosity,low strength,etc.of the deep fill area,the hole collapse problem often occurs during dry operation.In view of such problems,this paper combined with the treatment of the problem of collapse of holes during the construction of anti-slide piles in a slag soil landslide control project in Nanjing,analyzed the reasons for the collapse of large diameter cast-in-situ piles in the deep filling area and based on engineering practice,Put forward a comprehensive treatment plan,a good solution to the occurrence of the hole collapse problem,and provide a reference and reference for dealing with the hole collapse problem in similar areas.