描述灌注桩Q-s曲线的Gompertz模型  

Load-settlement curves of cast-in-place piles based on Gompertz model

作　　者：蒋建平[1] 许宏发[2] 高广运[3] 

机构地区：[1]上海海事大学海洋环境与工程学院,上海201306 [2]解放军理工大学工程兵工程学院,江苏南京210007 [3]同济大学土木工程学院,上海200092

出　　处：《解放军理工大学学报（自然科学版）》2010年第5期517-521,共5页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50678128);上海市教委科研创新基金资助项目(09YZ250)

摘　　要：为深化对灌注桩承载性状的理解,对灌注桩的桩顶荷载—桩顶沉降曲线(即Q-s曲线)进行了描述。针对桩的承载特性,选用了生物领域的Gompertz生长曲线模型。对9根现场试验灌注桩的实测资料的拟合表明,Gompertz模型对灌注桩的桩顶荷载—桩顶沉降曲线有高的拟合精度,且该模型拟合效果比双曲线模型要好,特别是在曲线的尾部。结果表明,选用的Gompertz模型能对灌注桩的桩顶荷载—桩顶沉降曲线的拟合进行较好的描述,利用获得的拟合方程式能对灌注桩承载力进行预测。To deepen the understanding on the bearing characteristics of the cast-in-place piles,the load-settlement curves of the cast-in-place piles were described.Aiming at the bearing characteristics of the cast-in-place piles,the Gompertz mathematical model was selected.The fitting test results of 9 field cast-in-place piles with the model show that the fitting precision is high,and the fitting effect with the model is better than that with the hyperbolic model,especially in the tail of the load-settlement curves.Moreover,the Gompertz mathematical model has good adaptability for the description of the load-settlement curves,and the corresponding fitting equations obtained in this paper can be used to forecast the vertical bearing capacity of the cast-in-place piles.

关 键 词：灌注桩 Gompertz模型 Q-S曲线 实测资料 

分 类 号：O382.2[理学—流体力学]