摘要
即使在很小的应力作用下,土体湿化后也会有变形;大部分土体的湿化并没有达到饱和状态,处于部分湿化状态,因此湿化计算有必要解决初始湿化变形和部分湿化变形。将初始湿化变形、土体的刚度参数、强度参数视为湿化程度的函数,考虑渗流过程的影响,从而将传统只能计算干态和湿态的计算方法推广,能够考虑初始湿化变形和湿化变形过程。介绍相应的计算理论,编制相应的计算程序。利用该模型可以比较好地解决高填方工程中的应力路径和湿化路径问题,并应用该方法模拟巫山污水处理厂高填方高压实土体的湿化试验过程,计算湿化变形随时间变化的关系。计算结果与湿化试验曲线吻合较好,证明该方法的可行性。
There is an initial wetting strain between dry state and wet state of soil sample,even no pressure exerts on the sample.Most soils in nature undergo the partial wetting process;and the saturated wetting process carries out from unsaturated state to saturated state.Therefore,it is necessary to calculate the initial wetting strain and partial wetting process.A new practical method interpreted takes unsaturated seepage into consideration,and takes the initial deformation and soil parameters as the function of wet degree to solve partial wetting process.This method is put forward on the basis of the original method,which can only solve the dry state and wet state deformation.In this paper,the theory about the method is introduced;and corresponding software is developed.This method can solve the influences of stress path and wetting path well in the case of high fill engineering.The wetting process of highly compacted soil in Wushan Municipal Sewage Treatment Plant is simulated by this method.Results gained from numerical simulation have a good agreement with those from oedometer test.It proves the validity of the new method.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2006年第z2期4120-4125,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(50378073)
关键词
土力学
部分湿化
非饱和渗流
衰减型模型
高压实性土
高填方
soil mechanics
partial wetting
unsaturated seepage
slump-type model
highly compacted soil
high fill
