一、概况哈尔滨市某贸易中心大楼桩基础直径为0.6m,桩长10.8m的浅水灌注桩,共345根。施工地区平均地下水位为-6m左右,粉砂层为-7m左右,中砂罢为-10.5m左右。桩顶部没有2.5m高承台基础。每根桩要求进入中砂层2m以上。这项工程的桩基础,前期施工采用GC——40H大口径工程钻机成孔,后期采用冲 I. Overview A total of 345 shallow-water bored piles with a diameter of 0.6m and a pile length of 10.8m have been constructed in a trading center building in Harbin City. The average groundwater level in the construction area is about -6m, the silt layer is about -7m, and the medium sand level is about -10.5m. There is no 2.5m high platform foundation at the top of the pile. Each pile requires access to 2m above the sand layer. The pile foundation of this project was pre-constructed with GC- 40H large-caliber engineering drilling rig as a hole, and the later stage was used as a foundation.