嵌岩灌注桩事故类型分析和处理方法研讨  

Research on Defect Types and Treatment Methods of Cast-in-place Piles Embedded in Rock

作　　者：林本海[1] 容柏生[1] 

机构地区：[1]广东省建筑设计研究院,广东广州510010

出　　处：《建筑结构学报》2002年第4期54-58,64,共6页Journal of Building Structures

摘　　要：本文首先对嵌岩灌注桩的承载机理进行了简要分析,嵌岩灌注桩的单桩承载力由桩周土层段侧摩阻力、嵌岩段侧摩阻力和端阻力三部分组成;桩基设计应以桩身混凝土强度、地基对桩所能提供的承载力及桩体总沉降量作为三个控制标准进行设计;对具有软弱下卧层时的桩基设计方法进行了介绍;然后对嵌岩(人工挖孔)桩的三种事故类型(桩身强度不足、桩基的承载力不足及桩的沉降量过大)进行了讨论,并给出具体的处理工程实例,供同行参考。Firstly,the bearing mechanism of ca st-in-place piles embedded in rock h as been briefly analyzed.The bearing capacity of these piles consists of frictional resistance of each stratum of soil and rock,and the end bearing of rock.Three design criteria of the pi le that should be based upon are the concrete strength,the bearing capacity of foundation and the settlement of pil e.At the same time,the design method of the piles rested on the soft interc alation as its bearing stratum is also introduced.Lastly,three defect types of man dug pile embedded in rock,namely insufficient strength of pile shaft,less bearing capacity of stratum and large pile se ttlement are discussed with treatme nt methods given.

关 键 词：嵌岩灌注桩 事故类型 软弱下卧层 承载机理 

分 类 号：TU473.13[建筑科学—结构工程]