褥垫层对刚性短桩复合地基承载特性的影响  

Study on the Influence of Cushion in PHC Pile Composite Foundation

作　　者：李守德[1] 顾文强[1] 赵波[1] 

机构地区：[1]岩土力学与堤坝工程教育部重点实验室,岩土工程科学研究所,河海大学,南京210098

出　　处：《科学技术与工程》2014年第8期246-250,共5页Science Technology and Engineering

基　　金：国家科技支撑计划课题沿海大规模围垦工程关键技术研究(2012BAB03B02)资助

摘　　要：以预应力高强度混凝土(prestressed high-imtensity concrete,PHC)短桩复合地基静载试验为基础,运用FLAC3D软件建立计算模型;并模拟计算静载试验的情况,将数值计算的结果与现场静载试验的情况进行对比分析,结果表明所建模型能够较好地反映现场试验情况。在原模型的基础上建立3×3的PHC短桩复合地基模型。通过设置不同褥垫层厚度及不同褥垫层模量,对比分析计算结果,研究褥垫层厚度及其模量对PHC短桩复合地基承载特性的影响。结果表明:褥垫层对桩土荷载的分配具有很好的调节作用,同时褥垫层厚度及其模量的变化对PHC短桩复合地基的承载特性有一定的影响,需要合理选取。Based on the static load test of pile, the model is made with FLAC3D software, and simulation cal- culation the case of static load test. The numerical results and the field static load test were analyzed, the results showed that the model can well reflected the static load test of pile. Established the model of 3 x 3 PHC piles com- posite foundation based on the original model. In order to analysis the influence of the cushiong thickness and mod- ulus to the PHC pile composite foundation bearing characteristics, setting different thickness and modulus to the cushion. The results show that： the cushion has a good regulatory role on the pile-soil load distribution and the cushiong thickness and modulus have some influence on the bearing properties of PHC pile composite foundation. A reasonable selection of the cushion is necessary.

关 键 词：PHC短桩 复合地基 褥垫层 承载特性 

分 类 号：TU473.1[建筑科学—结构工程]