粉土p-y曲线的试验研究  

Experimental research on silt p-y curves

作　　者：王腾[1] 王天霖[2] 

机构地区：[1]中国石油大学(华东)石油工程学院,青岛255666 [2]大连海事大学机电与材料工程学院,大连116026

出　　处：《岩土力学》2009年第5期1343-1346,共4页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.50409007);国家863重大资助项目(No.2006AA09A106)

摘　　要：进行了浸水黄河粉土中模型钢管桩的水平静力荷载试验,对试验弯矩用6阶多项式进行拟合,推得了黄河粉土的p-y曲线,并与API建议砂土和软黏土p-y曲线进行了比较。根据粉土试验p-y曲线,提出了黄河粉土p-y曲线的理论表达式,用此理论p-y曲线进行了水平荷载下模型桩的数值分析,并与试验测试弯矩进行了比较。研究结果表明:粉土的黏聚力对p-y曲线有很大的影响,忽略粉土黏聚力的抗力作用将导致桩基水平承载力的设计偏于保守;基于理论粉土p-y的模型桩的数值结果与试验弯矩值吻合得较好。An experimental research on a model pile embedded in a deposit of submerged silt has been carried out under lateral static loadings. The 6th order polynomial function was selected to fit the tested results and back-calculate the lateral soil reaction p and lateral deflection y. Thus, the silt p-y curves and theoretical p-y curves formulation accounted for both angle of friction and cohesion component were proposed and compared with the API recommended ones for sand and soft clay, respectively. The results indicate that the cohesion component has great effect on the p-y curves, neglecting the soil resistance from the cohesion component, sometimes will lead to a significant conservation pile foundation design in the case of silt. And the predicted bending moment responses of the model pile using these silt p-y curves are in good agreement with the experiment results.

关 键 词：P-Y曲线 黄河粉土 模型桩 试验研究 

分 类 号：TU411[建筑科学—岩土工程] TU473[建筑科学—土工工程]