摘要
后压浆管路经过设计改装,增加了三通接头、止回阀和等螺旋清孔器等装置,提出了与正循环清孔法结合使用的新工艺。此工艺实现了后压浆管路不仅能用于注浆,还能用于清孔。与传统的正循环法相比,明显提高了清孔效率,打破了正循环法只能用在中小直径桩的局限性。与气举反循环法相比,所需人工较少,施工更简单。此外,清孔完成后,等螺旋清孔器继续喷射压缩空气,清扫孔底,进一步巩固了清孔效果。新工艺在各方面都有显著优势,值得在桩基工程领域推广应用。
A new borehole cleaning method along with the normal circulation borehole cleaning is presented. The post-grouting pipeline is developed through optimizing design and modification. The added instruments such as T-joint, check valve and equal helical borehole clearing device are summarized. The post-grouting pipeline is not only used for post-grouting, but also for borehole cleaning. Compared with the traditional normal circulation borehole cleaning method, this method can obviously improve the efficiency of the borehole cleaning. It can make up the limitation that the normal circulation borehole cleaning is usable only for common small or medium piles. Compared with the air-lift reverse circulation borehole cleaning, it can be noted that the new method is much easier to construct and requires less workers. Besides that, the equal helical borehole clearing device continues to spray compressed air and cleans up the bottom sediment. Its goal is to further consolidate the effect of borehole cleaning. Therefore, the new borehole cleaning method has obvious advantages in every respect, and it is worth generalizing and applying in the field of pile foundation engineering.
出处
《施工技术》
CAS
北大核心
2015年第24期83-85,97,共4页
Construction Technology
关键词
桩基础
桩基础清孔
等螺旋清孔器
压缩空气
后压浆
沉渣
piles
borehole cleaning
equal helical borehole clearing device
compressed air
post-grouting
sediments
