隧道填充性岩溶软基弹塑性固结沉降机理研究

软粘土孔隙比大、渗透率低、压缩性和含水量高,这种特性决定了它的变形沉降受到包括应力历史、应力路径、固结压力、软土特性等诸多因素的影响。为进一步揭露软粘土固结沉降的作用机理,引入了基于混合物理论的两相多孔介质理论,描述渝怀铁路干溪沟隧道DK278＋628～＋698段填充性岩溶软基的弹塑性固结沉降过程。该理论具有推理严密和数学论证严谨的特点,能充分考虑固结过程中的水土耦合作用。

Study on the Mechanism of Elastoplastic Consolidation Settlement of Filling Karst Soft Foundation of Tunnel

Soft clay has large void ratio,low permeability and high compressibility and water content,which caused its deformation settlement affected by many factors such as stress history,stress route,consolidation pressure,and soft soil characteristics.In order to further expose the action mechanism of soft clay consolidation settlement,the theory of two-phase porous medium based on the theory of mixtures is introduced to describe elastoplastic consolidation settlement of filling karst soft foundation in DK278+628~...