隧道浅覆土孔隙流-土骨架-热力学同持模型及非共轴逾渗

Shallow overburden is the main problem facing of the city tunnel project.The interaction of pore fluid-soil skeleton-thermodynamical action and non coaxial percolation characteristics directly affect the strength/stability and long settlement deformationthe of shallow overburden bearing layer under the effect of mixed factors such as temperature, rheology, unsaturated, particle characteristics, cyclic consolidation..It is the critical factor for metro construction, engineering accidents and environmental disturbance, also is a direct control factor that affects the structure and driving safety of the tunnel,at the same time, it is also an engineering treatment and a theoretical difficulty problem.The research on its engineering characteristics, construction technology and service characteristics is obviously very important..The interaction of pore fluid-soil skeleton-thermodynamical action and non coaxial percolation characteristics of the shallow overburden tunnel is refining the research scheme aiming at the above problems.It is an innovation and scientific research topic in the era of the great development of urban subway transportation in China..Model can be a reasonable grasp of the complex factors such as the non coaxial percolation characteristics and friction of the soil structure interaction of tunnel construction and long-term operation, soil stiffness ratio of the depth nonlinear space-time distribution.The key technical parameters of controlling the uplift of the shallow overburden soil can be provided and the safe/stable/reliable design purposes can be achieved to ensure the long-term safe operation of the subway system.The interaction research of pore fluid-soil skeleton-thermodynamical action and non coaxial percolation characteristics for the shallow overburden tunnel,which is the essence study of the complex engineering characteristics of the subway system.The proposal has the important scientific value and practical significance in process, pattern, mechanism and effect research.

浅覆土是城市隧道工程面临的主要难题，孔隙流-土骨架-热力学共同作用的非共轴逾渗特性直接影响浅覆土持力层在温差、流变、非饱和、颗粒特征、循环固结等多因素作用下的强度稳定和隆沉变形，是施工处理、工程事故及环境扰动的关键诱因，是影响隧道结构及行车安全的直接控制因素，又同时是工程与理论难题。展开其工程特点、施工工艺及服役特性的研究显然极其重要。. 隧道浅覆土孔隙流-土骨架-热力学同持模型及非共轴逾渗特性针对以上问题展开精细化研究方案，其是我国城市地铁交通大发展时代的创新科研课题。模型可合理把握隧道施工及长期运营的非共轴逾渗特性，摩擦土-结相互作用，土结刚度比的非线性深度分布等复杂因素，提供控制浅覆土持力层隆沉的关键技术参数，实现安全稳定可靠的设计目的，保障地铁长期安全运营。隧道浅覆土孔隙流-土骨架-热力学同持模型及非共轴逾渗是地铁系统复杂工程特性的本质溯源，具有重要的科学价值和现实意义。

浅覆土是城市隧道工程面临的主要难题，孔隙流-土骨架-热力学共同作用的非共轴逾渗特性直接影响浅覆土持力层在温差、流变、非饱和、颗粒特征、循环固结等多因素作用下的强度稳定和隆沉变形，是施工处理、工程事故及环境扰动的关键诱因，是影响隧道结构及行车安全的直接控制因素，又同时是工程与理论难题。展开其工程特点、施工工艺及服役特性的研究显然极其重要。.隧道浅覆土孔隙流-土骨架-热力学同持模型及非共轴逾渗特性针对以上问题展开精细化研究方案，其是我国城市地铁交通大发展时代的创新科研课题。模型可合理把握隧道施工及长期运营的非共轴逾渗特性，摩擦土-结相互作用，土结刚度比的非线性深度分布等复杂因素，提供控制浅覆土持力层隆沉的关键技术参数，实现安全稳定可靠的设计目的，保障地铁长期安全运营。隧道浅覆土孔隙流-土骨架-热力学同持模型及非共轴逾渗是地铁系统复杂工程特性的本质溯源，具有重要的科学价值和现实意义。