(珠海市房屋安全鉴定所 519015)
【提要】 介绍了沉管灌注桩基不均匀沉降导致某群楼严重倾斜的事故。对在深厚淤泥上新回填较厚土层的软土地基而言，其详勘应按规范的有关要求进行。选择桩型时应注意适用条件，尽可能不用沉管灌注桩。但无论桩型如何，单桩承载力和工程桩长均应通过试桩确定，必要时，尚应验算桩基沉降变形。沉桩时应以最后贯入度控制为主，以免因短桩导致的不均匀沉降过大而造成工程事故。
【关键词】 软土地基 沉管灌注桩 不均匀沉降 有效摩擦力 最后贯入度 纠偏
Appraisal and Treatment of a Inclination Accident of  Vibro Pile Foun dation/Diao Xueyou(Building Safety Appraisal Institute in Zhuhai, Zhuhai 519015,China)
Abstract:For deep soft clay foundation  filled up  with deeper cohesive soil,its detailed investigation should meet the  related requirement of code.The vibro pile should not be used in the soft clay.Whatever the pile type may be,the length and bearing capacity of single pile should be defined by static load test, and  settlement of pile foundation should be checked when necessary.The pile driving should take final set  as dominant control factor to avoid accident caused by short  piles.
Keywords:soft clay; vibro pile; differential settlement; effective skin friction; final set; rectify deviation