用函数模型外推法预测抗拔桩极限承载力  

Forecast of Extreme Limit of Anti-lifting Pile's Bearing Capacity by Function Model of Extrapolation

作　　者：王之军[1] 刘建平[1] 袁加贝[1] 

机构地区：[1]中国地质大学〈北京〉工程技术学院

出　　处：《探矿工程（岩土钻掘工程）》2005年第9期12-14,共3页Exploration Engineering:Rock & Soil Drilling and Tunneling

摘　　要：在桩的抗拔课题中,极限抗拔承载力的确定是其重要内容。当抗拔试桩未加载至其破坏荷载时,根据已有的荷载位移数据,用函数模型外推法预测极限抗拔承载力具有理论意义和实践意义。以工程实例为基础,用G rap-her4的曲线拟合功能,选用双曲线模型、指数模型和幂函数模型,成功预测出了极限抗拔承载力。通过结果比较,表明指数函数模型具有较好的预测精度。The determination of extreme limit of anti-lifting bearing capacity is an important content for pile＇s anti-lifting research. When the load of anti-lifting pile does not reach the disrupt load, the forecast of extreme limit of anti-lifting pile＇s bearing capacity by function model of extrapolation is significant in both theory and practice, according to the known loaddisplacement data. The extreme limit of anti-lifting bearing capacity was successfully forecasted out by hyperbola model, exponent .model and power function model, using the imitation functions of curves of Grapher 4 and taking project cases as a base. The comparison of the results of three function models shown that the exponent model has higher forecast precision.

关 键 词：抗拔桩 极限承载力 函数模型 外推法 预测 

分 类 号：TU473.11[建筑科学—结构工程]