基于钢护筒的植桩平台的特点及植桩锚固体系设计

采用钢护筒支撑形成的"植桩平台"具有适应复杂的工程地质条件、减少大型船机设备的投入使用、加快施工进度、避免打入钢护筒造成钢护筒受力变形的特点。通过控制翻浆孔口的位置和大小、调节锚固混凝土的和易性可以保证钢护筒具有足够的翻浆高度,使钢护筒与基岩间形成足够长度的刚性节点,确保钢护筒在汛期内的的单桩稳定性。

Characteristic of pile-drilling platform design based on steel casing and anchoring system design

The pile-drilling platform formed with the support of steel casing can adapt to complex engineering geologic conditions,reduce the use of large vessels and machinery,speed up the construction schedule and avoid the deformation of steel casing caused by concrete striking into it.By controlling the position and size of frothing orifice and adjusting the workability of the anchorage concrete,we can ensure that the steel casing get enough frothing height and thus form a rigid node of sufficient length between the steel casing and the bedrock to guarantee the stability of the single pile with steel casing during the flood period.