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

Liu Tao; Zhang Meixin; Cui Feng

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Liu Tao, Zhang Meixin, Cui Feng. Dragging ball test on flow characteristics of liquefied silt under cyclic loading[J]. Haiyang Xuebao, 2017, 39(3): 115-121.

Citation:

Liu Tao, Zhang Meixin, Cui Feng. Dragging ball test on flow characteristics of liquefied silt under cyclic loading[J]. Haiyang Xuebao, 2017, 39(3): 115-121.

Liu Tao, Zhang Meixin, Cui Feng. Dragging ball test on flow characteristics of liquefied silt under cyclic loading[J]. Haiyang Xuebao, 2017, 39(3): 115-121.

Citation:

Liu Tao, Zhang Meixin, Cui Feng. Dragging ball test on flow characteristics of liquefied silt under cyclic loading[J]. Haiyang Xuebao, 2017, 39(3): 115-121.

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

Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Qingdao 266100, China;Key Laboratory of Ocean Environment and Ecology, Ministry of Education, Qingdao 266100, China

Received Date: 2016-05-23

Abstract

Abstract

According to the theory of Stokes Law, the test apparatus of flow characteristics of liquefied silt is developed based on the shaking table tests. A steel sphere, embedded in the test box, 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. Analysis the relationship between apparent viscosity and excess pore pressure ratio during silty liquefaction. The change of apparent viscosity and strain rate after silty liquefaction is researched. The result shows that, during the shaking table test, the pore pressure showed a rapid increase, and silt quickly reached a liquefied state; there was consolidation phenomenon in the soil bed, and vibration had a great influence on consolidation. Analysis found that, when the soil has not reached completely liquefied state (ru<1), the apparent viscosity decreases with increasing of excess pore pressure ratio; when it has reached liquefied state (ru=1), the shear stress decreases with increasing of strain rate, the silt is shear thinning non-Newtonian fluid.
- silt,
- liquefaction,
- fluid,
- dragging ball test,
- shaking table test

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References(18)

References

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