Influence of Arrangement and Testing Method on the Shear Strength of Granular Material

• Main Authors: Hsiao-Ruei Chang, 張曉瑞
• Other Authors: Dr.Lai J
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/51505133646448430245

碩士 === 朝陽科技大學 === 營建工程系碩士班 === 90 === Abstract The gravel formation is a composite material which is composed of various sizes of particles and fines . It’s geotechnical characteristics and engineering behavior are significantly different from those of alluvial and sedimentary deposits or rocks . Due to the complexity in its composition , significant scatter exist in the measured shearing strength using conventional test method . In the recent years , several infrastructures will encounter with excavation in gravel formation . Therefore , a better understanding in the engineering behavior , and an improved method in obtaining the shear properties of gravel formation are essential for the engineering practice . Currently , the direct shear test is the most common method in obtaining the shear strength parameters of gravels . However , this apparatus is subjected to major defect in forcing the failure plane to occur between the upper and lower halves of the shear box . On the other hand , the simple shear machine has been proved to be very useful in measuring the shear strength of soils . Therefore , a large scale apparatus which can perform direct shear and simple shear test was developed to investigate the effects of arrangement and testing method on the shearing properties of granular material . Results of this study indicate that the shearing strength of the granular material is strongly influenced by the location of failure plane in direct shear test . It is highly recommended that simple shear test should be considered as an alterative in obtaining the the shearing strength parameter of gravels .