摘要
利用土工的常规三轴仪与真三轴仪等设备,对同一种土进行了固结不排水的加荷与卸荷2种不同的试验研究,通过分析(1′σ-3′σ)~1ε、(1′σ/3′σ)~1ε和u^1ε等的试验曲线,并结合Matsuoka-Nakai屈服破坏准则和土样屈服面在π平面上的演化轨迹,认为应该以(1′σ/3′σ)max值作为土样的破坏标准,并进而指出了土体孔隙水压力变化的特征值常常伴随着(σ′1/σ′3)max和(1′σ-3′σ)max的左右同时出现.
In soil mechanics, （σ1/σ3）max or （σ1-σ3）max Or certain strain ε1 value is usually taken as failure standard value of soil sample and the failure standard value being better for soil compressive test is deserved to do further research. Based on this view point, for the same soil mass, traditional triaxial compressive instrument and advanced true triaxial compressive instrument are used at the same time to do the two types consolidation undrained tests under loading states and unloading states separately and corresponding test curves such as （σ1-σ3）～ε1、（σ1/σ3）～ε1 and u～ε1 et al. are analyzed for this purpose. By combined Matsuoka-Nakai failure criterion and its yield curve changing tendency on ~r planes, it can be judged that the （σ1/σ3）max should be taken as reasonable failure standard value of soil sample. Furthermore, it is pointed out that characteristic value of pore water pressure will always occur companying these characteristic values, such as （σ1/σ3 ）max and （σ1-σ3）max simultaneously.
出处
《湖北工业大学学报》
2006年第5期1-5,共5页
Journal of Hubei University of Technology
关键词
应力与应变关系
孔隙水压力
屈服破坏准则
破坏标准值
stress and strain relationship
pore water pressure
failure criterion
failure standard value
