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首页> 外文会议>International symposium on deformation characteristics of geomaterials;IS-Seoul 2011 >Change of Mechanical Properties during Dissolution Process in Soluble Granular Soils
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Change of Mechanical Properties during Dissolution Process in Soluble Granular Soils

机译：可溶性粒状土壤溶解过程中的力学性能变化

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Mechanical properties of engineering soils in earth structures or foundations may be influenced by the dissolution of soluble mineral. This paper addresses the evolution of the physical properties during dissolution of soluble particulate media. Two types of specimens including sand-salt mixtures and photoelastic-ice disk mixtures were used to investigate the changes of the granular soils from micro- to macro-scale. The dissolution was carried due to the saturation of the sand-salt mixtures or the melting of ice in photoelastic-icc disk mixtures. The measurements of shear wave velocities are implemented in sand-salt mixtures by using bender elements installed along the specimens. A system of strain gauges is installed on the side of the planar specimens to observe total response due to the melting of the ice disks. Particulate parameters consisting of force chain, local void and coordination numbers, and the horizontal force of the planar specimens of photoelastic disks and ice disks are monitored during ice dissolution. Experimental results show that the shear wave velocity decreases, then increases to a stable value, during salt dissolution. However, after dissolution the velocities are smaller than those before dissolution. The shear wave velocity in the upper non-wetted layer is slightly affected under the dissolution of the lower layer. Photographic images of photoelastic disk-ice mixtures show that the force chain, local void, and coordination number considerably change during dissolution. This Study demonstrates the correlation among the change of shear wave velocity, the total response and the particle parameters due to dissolution.
机译：可溶性矿物的溶解可能会影响土壤结构或地基中工程土壤的力学性能。本文探讨了可溶性颗粒介质溶解过程中物理性质的演变。两种类型的标本包括沙盐混合物和光弹-冰盘混合物，用于研究颗粒状土壤从微观到宏观的变化。由于砂-盐混合物的饱和或光弹性-icc圆盘混合物中冰的融化而进行溶解。剪切波速度的测量是通过使用沿试样安装的弯曲元件在沙盐混合物中进行的。在平面试样的侧面安装了一个应变仪系统，以观察由于冰盘融化而产生的总响应。在溶冰过程中，监测由力链，局部空隙和配位数以及光弹圆盘和冰圆盘的平面试样的水平力组成的微粒参数。实验结果表明，在盐溶过程中，剪切波速度先减小后增大到稳定值。但是，溶解后的速度比溶解前的速度小。上层非润湿层中的剪切波速度在下层的溶解下受到轻微影响。光弹性圆盘-冰混合物的摄影图像显示，力链，局部空隙和配位数在溶解过程中发生了很大变化。这项研究证明了剪切波速度的变化，总响应和溶蚀引起的颗粒参数之间的相关性。

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