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Experimental evaluation of the effect of the incidence angle and consolidation pressure on the hydraulic resistance capacity of clayey soils

机译：入射角和固结压力对黏土抗水承载力影响的试验评估

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The primary aim of this study is to examine the variations in erosion and hydraulic resistance capacity of clayey soils with a changing water flow under variable flow conditions. Clayey soils were artificially prepared with various kaolin-sand ratios and consolidation pressures. A laboratory flume apparatus, called an erosion function apparatus (EFA), is improved to measure the scour rate and critical shear stress of samples with changing water flow directions. A series of tests that use the improved EFA was performed for artificial clayey soils considering various directional changes in the water flow at incidence angles of 0 degrees, 90 degrees, 135 degrees, and 180 degrees. Based on the test results, the undrained shear strength indicated the highest correlation with the critical shear stress. Furthermore, the critical shear stress decreased and the scour rate increased with an increasing incidence angle. Finally, the characteristics of the hydraulic resistance capacity, the variations in critical shear stress, and the scour rate changed with the magnitude of consolidation pressure of the clayey soils. (C) 2018 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society.
机译：这项研究的主要目的是研究在可变流量条件下，随着水流量的变化，黏性土壤的侵蚀和水力阻力能力的变化。用各种高岭土砂比和固结压力人工制备粘土。改进了实验室水槽设备，称为侵蚀功能设备（EFA），以测量水流方向变化时的冲刷率和临界剪切应力。考虑到水流在0度，90度，135度和180度入射角下的各种方向变化，对人造黏土进行了一系列使用改进的EFA的测试。根据测试结果，不排水的剪切强度表明与临界剪切应力的相关性最高。此外，随着入射角的增加，临界剪切应力降低，冲刷速率增加。最后，水力抗力的特性，临界剪应力的变化和冲刷率随黏土固结压力的大小而变化。 （C）2018年由Elsevier B.V.代表日本岩土工程学会制作和托管。

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