铁道标准设计2016，Vol.60Issue(12)：80-84,5.DOI:10.13238/j.issn.1004-2954.2016.12.018
沉井基础竖向承载特性的离心模型试验研究
Centrifugal Model Test on Vertical Bearing Properties of Open Caisson Foundation
摘要
Abstract
Based on centrifuge model test, the bearing properties of open caisson foundation in saturated sand under vertical load are studied, the variation law of the ultimate bearing capacity of soil with the change of the embedded depth and foundation are identified, and contrastive analysis of the test results are conducted. The results show that (1) when the embedded depth of foundation is less than 5 meters, the curve shape of load-settlement is steep and there is a clear inflection point and the desirable inflection point corresponding to the load is the ultimate bearing capacity;when the embedded depth of foundation is not less than 10 meters, the curve shape of load-settlement is flat and no clear inflection point showed in the curve, and it is suggested the loading with relative settlement S/B=0. 07 ~ 0. 08 be regarded as the ultimate bearing capacity; (2) in homogeneous foundation, the ultimate bearing capacity increases exponentially with the increase of the relative embedded depth of foundation;(3) the expression function on the ultimate bearing capacity of open caisson foundation is further derived in view of the influence of the relative depth and foundation width, which can be used to estimate the ultimate bearing capacity of the open caisson foundation in sand soil.关键词
沉井基础/离心模型试验/极限承载力/基础埋深/基础宽度Key words
Open caisson foundation/Centrifugal model test/Ultimate bearing capacity/Foundation depth/Foundation width分类
建筑与水利引用本文复制引用
胡中波,马建林,徐力,梅新咏,王钦科..沉井基础竖向承载特性的离心模型试验研究[J].铁道标准设计,2016,60(12):80-84,5.基金项目
中国铁路总公司科技研究开发计划(2013G001-A-2) （2013G001-A-2）
