桩基负摩阻力变化规律  

Variation Law of negative skin friction of pile foundation

作　　者：苏钢 

机构地区：[1]南昌铁路勘测设计院有限责任公司,江西南昌330000

出　　处：《中国房地产业》2022年第22期210-213,共4页China Real Estate

摘　　要：桩周地基土产生的下沉变形量比桩下沉变形量更大时,桩侧全部表面或者部分表面将出现作用向下的负摩阻力。因为桩表面产生了方向相反的摩阻力,桩周土一部分的重量将作用于桩本身,因此负摩阻力会增加桩的下沉或发生不均匀的沉降,从而导致构造物破损甚至是破坏。When the subsidence deformation of the foundation soil around the pile is larger than the subsidence deformation of the pile,the whole surface or part of the surface of the pile side will have negative frictional resistance acting downward.Because the friction resistance in the opposite direction is generated on the surface of the pile,the weight of a part of the soil around the pile will act on the pile itself,so the negative friction resistance will increase the settlement of the pile or cause uneven settlement,resulting in damage or even destruction of the structure.

关 键 词：桩周地基土 沉降与抬升 负摩阻力 

分 类 号：TU4[建筑科学—土工工程]