海淤地质条件下钢管混凝土桩失稳对承载力影响的研究  

Study on the Influence of Steel Pipe Concrete Pile's Instability on the Carrying Capacity under the Conditions of Sea Sediment

作　　者：王玉琳[1] 

机构地区：[1]淮海工学院土木工程系,江苏连云港222005

出　　处：《建筑科学》2008年第11期73-76,共4页Building Science

基　　金：江苏高校自然科学研究计划项目(05KJB560005)

摘　　要：淤泥质土对桩身的侧向约束很弱,钢管混凝土桩的长径比过大、初始挠曲、接头缺陷都可能导致桩身失稳而影响其承载力。本文通过理论分析和数值分析,给出了海淤地质条件下钢管混凝土桩失稳临界条件和承载力计算公式的修正系数。结合连云港220kV云台变电所钢管混凝土桩加固模拟试验,验证了文章观点。The lateral restraint of silt soil on the pile body is very weak. Excessive slenderness ratio of the steel pipe concrete pile＇s, initial deflection and tie-in disfigurement will lead to the pile body＇s instability and influence its carrying capacity. In this paper, through theoretical and numerical analysis, the instability critical condition and the correctional coefficient of the carrying capacity calculation formula are presented. The paper＇s viewpoint is proved by reinforcing simulation experiment of Lianyungang-yuntai transformer substation＇s steel pipe concrete piles.

关 键 词：海淤 钢管混凝土桩 失稳 承载力 

分 类 号：TU473.13[建筑科学—结构工程]