CFG桩施工产生环境问题的机理分析及应对措施

Mechanism Analysis on Environmental Problems Caused by CFG Pile Construction and the Countermeasures

根据多年施工经验,长螺旋钻管内泵压CFG桩施工技术应用到郑州地区饱和粉土等软土层时,常出现桩周地面沉降、周边建筑物和路面开裂以及管道错位等环境问题。通过对长螺旋钻管内泵压CFG桩施工引起环境问题的机理进行综合分析,提出相应措施,并对长螺旋钻管内泵压CFG桩在饱和粉土等软土层中的适应性作出评价。

According to the years construction experience, when the technology of pump pressure CFG pile in continuous auger drilling pipe is applied in the stratum of saturated clay in Zhengzhou area, a series of environmental problems would come forth, such as ground settlement around piles and adjacent buildings, pavement cracking and pipeline dislocation. By the comprehensive study on the mechanism ofenvironmental problems caused by construction of pump pressure CFG pile in continuous auger drilling pipe, the countermeasures are put forward, and the adaptability evaluation on this technology in saturated silty soil is made.