地面沉降过程中固结系数的试验研究  

Experimental study on coefficient of consolidation of land subsidence

作　　者：徐海洋[1,2] 周志芳[1] 高宗旗[3] 

机构地区：[1]河海大学地球科学与工程学院,江苏南京210098 [2]华北水利水电学院资源与环境学院,河南郑州450011 [3]中交第一航务工程勘察设计院有限公司,天津300222

出　　处：《岩土工程学报》2011年第12期1969-1973,共5页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(51079043);水利部公益性行业科研专项经费项目(200901064)

摘　　要：根据渗透系数和孔隙比、孔隙比和有效应力的关系推导出固结系数与有效应力的关系公式。利用自行研制的试验装置,模拟释水条件下地面的沉降过程,通过对试验数据的分析,得出固结系数随着土体的压缩而逐渐变小的结论。考虑固结系数的非线性,修正了Terzaghi理论,将解析解与实测值进行对比,结果表明考虑了固结系数的非线性能更准确的计算地面的固结沉降。Based on the relationship among the void ratio,hydraulic conductivity and effective stress,a formula for the coefficient of consolidation and effective stress is derived.Using a self-developed test equipment to simulate land subsidence and through the analysis of test data,it is evident that the coefficient of consolidation is not constant but becomes small under compression.Considering the non-linear coefficient of consolidation,the Terzaghi＇s theory is modified.Analytic solutions are compared with the measured values.The results show that the calculated values of ground consolidation settlement are more accurate by means of the modified Terzaghi＇s theory of non-linear coefficient of consolidation.

关 键 词：太沙基理论 固结系数 渗透系数 

分 类 号：TU411[建筑科学—岩土工程]