沉井和根式沉井水平承载特性研究  

STUDY ON THE LATERAL BEARING PROPERTIES OF CAISSON AND ROOTSTALK CAISSON

作　　者：黄挺[1] 付守印[1] 

机构地区：[1]东南大学土木工程学院,南京210096

出　　处：《工业建筑》2010年第4期84-87,共4页Industrial Construction

摘　　要：通过水平静载荷试验,对沉井和根式沉井的水平承载性能进行分析研究。试验采用单向单循环水平维持荷载法,对一个纯试验用沉井进行加载,试验完成后在沉井壁预留孔顶入根键,然后再进行根式沉井的水平承载试验。试验得到了沉井基础及根式沉井基础的水平承载力、沉井的变形、井身弯矩等成果。试验结果表明:根式沉井基础较普通沉井基础,水平极限承载力提高近60%;在水平荷载较小时,根键对承载性能的提高不明显,但随荷载增大,其提高越来越明显。According to the field test of caisson and rootstalk caisson under lateral static load,the behaviors of caisson and rootstalk foundation under lateral load are studied.At first,the caisson was loaded by the single cycle load holding method in the test.Then,the caisson was fitted on rootstalks and tested.The horizontal bearing capacities of the caisson and the rootstalk caisson were measured,and the deformation and caisson bending moment were obtained.The results of the experiment indicate that horizontal bearing capacity of the rootstalk caisson increased by nearly 60 percent.The effect of rootstalk is obvious when the horizontal force is great.

关 键 词：沉井基础 根式沉井基础 现场试验 水平荷载 极限承载力 

分 类 号：TU470[建筑科学—结构工程]