摩擦单桩轴向受压承载力  

Axial Compression Bearing Capacity of Frictional Single Pile

作　　者：龚维明[1] 戴国亮[1] 朱建民[1] 

机构地区：[1]东南大学土木工程学院,江苏南京210096

出　　处：《桥梁建设》2010年第1期21-24,28,共5页Bridge Construction

基　　金：国家科技支撑计划资助(2006BAG04B01)

摘　　要：在《公路桥涵地基与基础设计规范》(JTJ 024-85)钻(挖)孔灌注桩桩端承载力计算公式的基础上,对国内外相关资料进行调研,收集整理数据较为理想的、能够反映当前桩基使用现状的113根试桩资料,对钻(挖)孔灌注桩的桩端承载力公式进行修订。修订后的公式把承载力极限值计算公式改为承载力容许值计算公式,规定桩端承载力在各持力层土类中的上限值,更加重视现场测试结果的应用,并对桩端沉渣厚度进行限制。修订后的公式对于长桩和大直径灌注桩承载力均有较好的适用性。On the basis of the formulae for calculating the pile base bearing capacity of bored （excavated） piles in the Code for Design of Ground Bases and Foundations of Highway Bridges and Culverts （JTJ 024-85）, the relevant domestic and foreign literatures are investigated, the data of 113 tested piles that are ideal and can represent the current service conditions of the piles are collected, sorted out and the formulae for calculating the base bearing capacity of the piles are modified. In the modified formulae, the formula for calculating the ultimate bearing capacity is changed into that for the allowable bearing capacity and the upper limit values of the bearing capacity in soils of different bearing layers are specified. The still greater importance is attached to the practical application of the filed tests, the thickness of the deposited slag at the pile base is restricted and it is proved that the modified formulae have good adaptability to the calculation of the bearing capacity of the long and large diameter bored （excavated） piles.

关 键 词：钻(挖)孔灌注桩 桩端承载力 上限值 试桩 

分 类 号：U443.15[建筑科学—桥梁与隧道工程]