By Yiqun Tang, Jie Zhou, Xingwei Ren, Qi Yang
Involving numerous components of geological engineering, geotechnical engineering and tunnel engineering, this publication describes the tender soil deformation features and dynamic responses prompted via subway vibration load. in keeping with box tracking and laboratory trying out info, with either complete micro-and macroanalysis, the authors current dynamic features and deformation cost of saturated delicate clay surrounding subway tunnels utilizing dynamic and static technique. Mechanism of deformation, failure in microstructure of soppy clay soil, dynamic reaction, macro deformation and payment are all mentioned and analyzed completely and systematically. a few of the study findings during this ebook were greatly utilized by way of huge subway businesses and should have broader software clients in destiny. the entire above make this booklet a worthwhile reference not just for technical engineers operating in subway layout or development but additionally for complex graduate scholars. Prof. Yiqun Tang works on the division of Geotechnical Engineering, Tongji college, Shanghai, China.
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Extra info for Dynamic Response and Deformation Characteristic of Saturated Soft Clay under Subway Vehicle Loading
Sample text
The influence of far field foundation on near FEM area was simulated by establishing transmission boundary conditions of the stress wave in thin-layer element method. The impedance function was used to represent the supporting act of group file foundation to upper bridge structure. Through numerical simulation, the dynamic properties of the Shinkansen viaduct on soft foundation under high-speed vibration loads were investigated. The influences of axle load, moving speed, and group pile foundation on viaduct vibration properties were analyzed accordingly.
Zhou and Lin (2005) acquired the relation between some microstructure characterization parameters and soil strength through direct shear tests and triaxial consolidation tests of undisturbed soft soil samples of marine deposits from central region in Pearl River Delta. And they further explored the macro-micro connection. Zhou and Lin (2008) subsequently started from laboratory consolidation tests and studied the microstructure properties variations and consolidation deformation characteristics.
But the difficulty is that when the loading cycles reach tens of thousands or hundreds of thousands, a huge amount of calculation is generated and it’s marginally harder for application. Li et al. (2006) preliminarily analyzed the accumulated settlement of the soft foundation under cyclic loads using isotropic elastoplastic bounding surface model and dynamic consolidation theory. But limited by the computation time, the cyclic times was not consistent with the actual situation. Relatively speaking, the first method is simple formulized and the parameters can be easily determined.
