摘要
利用室内水槽模拟黄河三角洲快速沉积环境,并进行了黄河水下三角洲快速沉积粉土层中单桩水平承载特性模型试验,获得桩身弯矩、位移,以此得到适用于快速沉积粉土层中的桩基py曲线,与API规范的p-y曲线相比,发现浅层土极限土抗力要大于黏土与砂土,而深层土极限土抗力则介于两者之间。并进行多组试验,讨论了桩的不同埋置方式对p-y曲线的影响,发现贯入桩p-y曲线与预埋桩p-y曲线相比具有较小的初始刚度,以及较大的极限土抗力;同时,相较于预埋桩,贯入桩对浅层土极限土抗力的影响更为显著。
Tests on a model pile embedded in rapidly deposited of subaqueous Yellow River delta silt are carried out under the lateral loadings,and the lateral displacement and bending moment of the pile are studied,so that the p-ycurves at different depths can be obtained.The proposed p-ycurve are compared to the existing API curves,the results show that the limit lateral soil resistance is larger than Matlock method and O＇Neill method in shallow soil layer,meanwhile between them in deep soil layer.More tests are carried out to quantify the effects of two different pile installation methods on the p y curves.It is found that the driven pile p-ycurves have relatively smaller initial stiffness but larger limit soil resistance than the pre-installed pile p-ycurves;furthermore,the driven pile have more significant influence on limit lateral soil resistance in shallow soil layer.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第10期81-87,共7页
Periodical of Ocean University of China
基金
国家自然科学基金重点项目(41572247)
山东省科技攻关项目(2014GGX104007)资助
关键词
水平荷载
快速沉积粉土
单桩
P-Y曲线
黄河水下三角洲
Lateral loading
rapiolly deposited silt
single pile
p-ycurve
subaqueous Yellow River Delta
