考虑温度和初始孔压非均布的竖井地基固结解  

Consolidation Solution of Vertical Drains Considering Temperature Effect and Non-Uniform Distribution of Initial Pore Pressure

作　　者：张玉国[1] 王闯 赵亚敏 杨文兵 Zhang Yuguo;Wang Chuang;Zhao Yamin;Yang Wenbing(Institute of Civil Engineering and Architecture,Zhongyuan University of Technology,Zhengzhou 450007,P.R.China)

机构地区：[1]中原工学院建筑工程学院,郑州450007

出　　处：《地下空间与工程学报》2023年第6期1907-1915,共9页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金项目(U1204511);河南省高等学校重点科研项目(19A560027)。

摘　　要：针对目前竖井地基热固结理论的不足,建立了基于轴对称下竖井地基固结计算模型,采用解析解法推导了考虑温度和初始孔压非均布影响的竖井地基固结一般解;给出了初始孔压呈梯形分布、矩形分布、正三角形分布和倒三角形分布下的超静孔压和固结度的计算表达式。根据所得解析解,编制计算程序,通过参数敏感性分析对竖井地基的固结特性进行研究。结果表明:在温度不变时,初始孔压的分布形式对固结特性有较大影响;初始孔压呈矩形和正三角形分布时,温度越高,超静孔压的消散速率越快;竖井地基底部的孔压值在固结过程中总是最大的,当初始孔压呈倒三角和梯形分布时,随着温度的升高,地基底部孔压值呈现由小变大的特点。In view of shortcomings the current theory of vertical drains foundation thermal consolidation,a calculation model of vertical drains foundation consolidation is established based on axial symmetry,and the general solution of vertical drains foundation consolidation considering temperature and on-uniform distribution of initial excess pore water pressure is derived by analytical method.The calculation expressions of excess pore pressure and consolidation degree under trapezoidal distribution,rectangular distribution,triangle distribution and inverted triangle distribution of initial pore pressure are given.According to the analytical solution obtained,the calculation program is compiled to study the consolidation characteristics of vertical drains foundation through parameter sensitivity analysis.The results show that:The distribution of initial pore pressure has great influence on the consolidation characteristics at constant temperature.When the initial pore pressure distribution is rectangular or triangle,the dissipation rate of excess pore pressure is faster with the increase of temperature,and the pore pressure value at the bottom of the vertical drains foundation is always the largest in the consolidation process.When the initial pore pressure distribution is inverted triangle or trapezoidal,the pore pressure at the bottom of the foundation becomes larger with the increase of temperature.

关 键 词：竖井地基 固结 温度效应 初始孔压非均布 解析解 

分 类 号：TU470[建筑科学—结构工程]