Cyclic behavior and excess pore water pressure development of hydraulic fill sand under cyclic loading
OUYANG Wei1, NI Xueqian1*, ZHANG Sheng1, LIU Guangqing1, ZHANG Feng1, 2
(1. School of Civil Engineering, Central South University, Changsha, Hunan 400083, China; 2. College of Civil Engineering,
Tongji University, Shanghai 200092, China)
Abstract：Hydraulic fill sand, an important material in coastal engineering, has been widely utilized in major projects. In comparison with conventional quartz sand, it typically contains a certain proportion of shell fragments, which significantly influence the physical and mechanical properties. Under seismic loading, hydraulic fill sand is susceptible to liquefaction, thereby posing potential risks to engineering safety. Therefore, this study systematically investigates the cyclic response and excess pore water pressure development of hydraulic fill sand with varying shell contents through undrained cyclic triaxial tests. It is found that liquefaction resistance decreases gradually as the shell content increases. Meanwhile, the development pattern of excess pore water pressure shifts from a three-stage moderated process to a two-stage rapid process. The presence and breakage of shell fragments would alter the soil skeleton fabric, permeability characteristics and force chain transmission, which collectively account for the reduction in liquefaction resistance of hydraulic fill sand.
欧阳威1，倪雪倩1*，张 升1，刘光庆1，张 锋1，2. 循环荷载下吹填砂动力响应及超孔隙水压力发展特性[J]. 岩石力学与工程学报, 2026, 45(3): 946-954.
OUYANG Wei1, NI Xueqian1*, ZHANG Sheng1, LIU Guangqing1, ZHANG Feng1, 2. Cyclic behavior and excess pore water pressure development of hydraulic fill sand under cyclic loading. , 2026, 45(3): 946-954.
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2026, Vol. 45 
