Dragging ball test on flow characteristics of liquefied silt under wave loading

Liu Tao; Cui Feng; Zhang Meixin

doi:10.3969/j.issn.0253-4193.2016.03.012

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Liu Tao, Cui Feng, Zhang Meixin. Dragging ball test on flow characteristics of liquefied silt under wave loading[J]. Haiyang Xuebao, 2016, 38(3): 123-130. doi: 10.3969/j.issn.0253-4193.2016.03.012

Citation:

Liu Tao, Cui Feng, Zhang Meixin. Dragging ball test on flow characteristics of liquefied silt under wave loading[J]. Haiyang Xuebao, 2016, 38(3): 123-130. doi: 10.3969/j.issn.0253-4193.2016.03.012

Liu Tao, Cui Feng, Zhang Meixin. Dragging ball test on flow characteristics of liquefied silt under wave loading[J]. Haiyang Xuebao, 2016, 38(3): 123-130. doi: 10.3969/j.issn.0253-4193.2016.03.012

Citation:

Liu Tao, Cui Feng, Zhang Meixin. Dragging ball test on flow characteristics of liquefied silt under wave loading[J]. Haiyang Xuebao, 2016, 38(3): 123-130. doi: 10.3969/j.issn.0253-4193.2016.03.012

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Dragging ball test on flow characteristics of liquefied silt under wave loading

doi: 10.3969/j.issn.0253-4193.2016.03.012

1.
College of Environment Science and Engineering, Ocean University of China, Qingdao 266100, China;Shandong Provincal Key Laboratory of Marine Environment and Geological Engineering, Qingdao 266100, China
2.
College of Environment Science and Engineering, Ocean University of China, Qingdao 266100, China

Received Date: 2015-04-17
Rev Recd Date: 2015-06-08

Abstract

Abstract

Silty seabed exists widely in the Yellow River Subaqueous Delta. Liquefied silt has properties similar to fluid. It has found that the behavior of liquefied silt can be simulated appropriately by modeling the liquefied silt as viscous fluid. According to the theory of Stokes Law,the test apparatus of flow characteristics of liquefied silt is developed based on the wave flume tests. A steel sphere,embedded in the wave flume,can be moved in the horizontal direction when the silt liquefaction occurs. Resistance force and velocity of the steel sphere are measured during sphere dragging,then apparent viscosity can be evaluated. Considering fully the infection of wave parameters and excess pore pressure ratio in the tests. The results indicate that this apparatus can meet the test requirements. It can be observed the processes of pressure buildup when it is forced by the cyclic loading of wave. Wave parameters have great influence on the results,apparent viscosity decreased as wave height increase. Apparent viscosity slowly enlarge with the passing of time at the same wave heights. Along with the increasing of pore pressure ratio,the apparent viscosity of the liquefied silt apparently decreases.
- silt,
- liquefaction,
- fluid,
- dragging ball test

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References(15)

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