延边地区螺旋锥体挤土桩设计方法与施工技术

Design method and construction technology of rotary extrusion cast-in-place pile in Yanbian area

螺旋锥体挤土桩的成孔与桩过程挤土更充分,更合理,它是将旋转挤压灌注桩成孔的主要挤土原理(依赖螺旋柱体叶片)与短螺旋桩(SDS桩)成孔的主要挤土原理(依赖锥体芯管外表面)叠加在一起,使桩孔侧壁及孔底的密实性更好。结合延边地区的地质情况,提出适合该地区的螺旋锥体挤土桩设计方法与施工质量控制技术措施。

During the drill hole of rotary extrusion pile, squeezing soil more fully, more reasonable, and it is the main squeezing principle of the rotating squeezing castin-place pile into the hole（ depending on the spiral cylinder blade） and the main soil squeezing principle of the short spi-ral pile（ SDS pile）. The side wall of the hole and pile bottom hole density better. According to the geological conditions of Yanbian area, the de-sign method and construction quality control measures of the spiral rock pile in Yanbian area are put forward.