摘要
选取常用的双折线荷载传递函数,推导出一组轴向荷载-沉降曲线的解析算式,从而用其来表征桩的荷载-沉降曲线;选取双曲线函数来表征地基土的荷载-沉降曲线,推导出了水泥土桩复合地基中考虑桩-土相互作用的桩土应力比的解析算式,并讨论相关参数对桩土应力比的影响。研究结果表明,水泥土桩复合地基桩土应力比不仅与桩周土的特性有关,而且还受到桩体尺寸、弹性模量和复合地基所受的总荷载的影响。其结果为复合地基桩土应力比的计算提供了一种新思路。
With bilinear load transfer function, a set of equations for the axial load-settlement curve is established; furthermore, it is applied to the load-settlement of pile. Then hyperbolic load-settlement curve is applied to soil; an analytical formula for analyzing pile-soil stress ratio under the interaction of pile and soil is deduced; and the influence of several relevant parameters on pile-soil stress ratio are discussed. The study shows that the pile-soil stress ratio of soil-cement pile composite foundation is not only related with the characteristic of surrounding soil of the pile, but also dimension, elastic modulus of the pile and the total load of composite foundation. It provides a new way for the calculation of pile-soil stress ratio of composite foundation.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2005年第9期1432-1436,共5页
Rock and Soil Mechanics
基金
国家自然科学基金资助项目(No.50478090)。
关键词
水泥土桩
复合地基
桩土应力比
双折线硬化模型
soil-cement pile
composite foundation
pile-soil stress ratio
bilinear hardening model
