输电杆塔结构新型桩-板复合基础下压承载力特性模拟分析  

Simulation analysis on compressive-load-bearing capacity of new plate-pile foundation in transmission tower

作　　者：倪辉辉[1] 张大长[1] 李布辉[2] 岳健广[1] 

机构地区：[1]南京工业大学土木工程学院,江苏南京211800 [2]河海大学土木与交通工程学院,江苏南京210012

出　　处：《南京工业大学学报（自然科学版）》2015年第5期92-96,共5页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：江苏省科技厅前瞻性联合研究项目(BY2014005-11)

摘　　要：为了研究新型桩-板复合基础受下压荷载时,基础的承载性能及桩土互相作用的机制,应用有限元软件开展了大板基础、单桩基础和桩-板复合基础的下压承载力模拟分析。研究表明:新型桩-板复合基础的荷载-沉降曲线为缓降型曲线,下压荷载作用过程中,桩率先发挥其承载力,当板底地基土达到承载力极限时,桩-板复合基础达到极限承载力。结合现有复合桩基的相关理论,提出了一种基于单桩极限承载力Pu的设计方法,适用于新型桩-板复合基础。To study the compressive load carrying capacity and the mechanism of interaction of piles and soil when the new plate-pile foundation subjected to compressive load,the nonlinear finite element analysis on slab base foundation,single-pile foundation and new plate-pile foundation were carried out.The results showed that the load-settlement curve of the new plate-pile foundation decreased slowly.During the process of loading,loadcarrying capacity of the pile was the first to reach its limit state. When the loadcarrying capacity of the foundation soil on the plate reached limit state,the new plate-pile foundation reached to its ultimate load carrying capacity. Based on the relevant theory of existing composite pile foundation,a design method on account of single-pile limit load-bearing capacity of Puwas proposed,and was applied to new plate-pile foundation.

关 键 词：复合桩基 模拟分析 荷载分担比例 承载机制 设计方法 

分 类 号：TU473[建筑科学—结构工程]