滨海大陆架特殊性岩土工程勘察钻探实践

Drilling Practice of Special Geotechnical Engineering Exploration in the Coastal Continental Shelf

摘要:

结合青岛万达游艇产业D区在滨海大陆架区域经人工抛石筑坝围堰，吹填淤泥、淤泥质土、砂土后经真空预压地基处理，再进行岩土工程勘察的实例，介绍了勘察钻探施工工艺和采取的相应技术措施。采用回转钻进、泥浆护壁钻进工艺，遇碎石、抛石地层先使用潜孔锤工程钻机和空压机采用跟管跟进、空气压缩锤冲击钻进的方式进行引孔。

Abstract:

This paper presents a special case in Qingdao, the geotechnical engineering exploration is carried out after damming cofferdam by artificial riprap in continental shelf region, hydraulic filling silt, silty soil and sandy soil and foundation treatment by vacuum preloading. The drilling construction technologies and corresponding technological measures are introduced. Rotary drilling and drilling by mud protection are adopted; in gravel and riprap formations, drilling with casing and air compression hammer percussive drilling technologies are used for the guide hole with DTH hammer engineering drill and air compressor.