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Orientation of Deposition Planes and Shear Strength of Typical Clays from Pakistan
Iranian Journal of Science and Technology, Transactions of Civil Engineering ( IF 1.7 ) Pub Date : 2019-04-29 , DOI: 10.1007/s40996-019-00267-x Mohsin Nawaz , Mubashir Aziz , Jehanzaib Israr
Iranian Journal of Science and Technology, Transactions of Civil Engineering ( IF 1.7 ) Pub Date : 2019-04-29 , DOI: 10.1007/s40996-019-00267-x Mohsin Nawaz , Mubashir Aziz , Jehanzaib Israr
This study presents results of unconsolidated-undrained triaxial compression tests on two typical clays of different plasticities from Pakistan. Remolded soil specimens were prepared using a special assembly to explore possible effects of orientation of deposition planes, shear rate and plasticity on mechanical behavior of soils. A stronger soil behavior was observed for samples with deposition planes perpendicular to axial loading, and this interaction weakened as orientation of deposition planes gradually became parallel to the axial load. With increase in shearing rate, low-plastic soil sample showed larger increase in strength parameters relative to high-plastic soil. For vertical and inclined deposition planes, a splitting failure surface along deposition plane was observed, whereas for deposition planes normal to loading direction the samples bulged out with no apparent slip surface. It is anticipated that the results of this study can be useful for interpretation of mechanical behavior of soil profiles with different orientations of deposition planes, soil samplings and loading directions.
中文翻译:
巴基斯坦典型粘土的沉积平面方向和剪切强度
本研究展示了对来自巴基斯坦的两种不同塑性的典型粘土进行的松散不排水三轴压缩试验的结果。使用特殊组件制备重塑土试样,以探索沉积平面的方向、剪切速率和可塑性对土壤力学行为的可能影响。对于沉积平面垂直于轴向载荷的样品,观察到更强的土壤行为,并且随着沉积平面的方向逐渐平行于轴向载荷,这种相互作用减弱。随着剪切速率的增加,低塑性土样品的强度参数相对于高塑性土表现出更大的增加。对于垂直和倾斜的沉积平面,观察到沿着沉积平面的分裂破坏面,而对于垂直于加载方向的沉积平面,样品凸出而没有明显的滑动面。预计这项研究的结果可用于解释具有不同沉积平面方向、土壤采样和加载方向的土壤剖面的力学行为。
更新日期:2019-04-29
中文翻译:
巴基斯坦典型粘土的沉积平面方向和剪切强度
本研究展示了对来自巴基斯坦的两种不同塑性的典型粘土进行的松散不排水三轴压缩试验的结果。使用特殊组件制备重塑土试样,以探索沉积平面的方向、剪切速率和可塑性对土壤力学行为的可能影响。对于沉积平面垂直于轴向载荷的样品,观察到更强的土壤行为,并且随着沉积平面的方向逐渐平行于轴向载荷,这种相互作用减弱。随着剪切速率的增加,低塑性土样品的强度参数相对于高塑性土表现出更大的增加。对于垂直和倾斜的沉积平面,观察到沿着沉积平面的分裂破坏面,而对于垂直于加载方向的沉积平面,样品凸出而没有明显的滑动面。预计这项研究的结果可用于解释具有不同沉积平面方向、土壤采样和加载方向的土壤剖面的力学行为。