Experimental developments for studying static and seismic behavior of retaining walls with liquefiable backfills     

M. M. Dewoolkar  H. -Y. Ko  R. Y. S. Pak 《Soil Dynamics and Earthquake Engineering》2000,19(8):75-593

The effects of earthquakes on cantilever retaining walls with liquefiable backfills were studied. The experimental techniques utilized in this study are discussed here. A series of centrifuge tests was conducted on aluminum, fixed-base, cantilever wall models retaining saturated, cohesionless backfills. Accelerations on the walls and in the backfill, static and excess pore pressures in the soil, and deflections and bending strains in the wall were measured. In addition, direct measurements of static and dynamic lateral earth pressures were made. In some tests, sand backfills were saturated with the substitute pore fluid metolose. Modeling of model type experiments were conducted. The experimental measurements were found internally consistent and repeatable. Both static and dynamic earth pressure measurements were determined to be reliable. It was also observed that for the test configuration adopted, a special boundary treatment such as the use of duxseal is optional. Static and seismic modeling of models were also successful, which indicated that the assumed scaling relations were essentially correct.  相似文献   

海洋工程地质的回顾与展望   总被引：21，自引：2，他引：19  

顾小芸 《工程地质学报》2000,8(1):40-45

本文通过对海洋工程地质发展的简单回顾阐述了其调查和评价的类别、方法与内容 ,对海底滑坡、砂土液化和原位土工测试等几个问题进行了重点展开 ,并对 2 1世纪的发展作了展望。  相似文献   

Shaking table tests on subgrade reaction of pipe embedded in sandy liquefied subsoil   总被引：3，自引：0，他引：3  

I. Towhata  W. Vargas-Monge  R. P. Orense  M. Yao 《Soil Dynamics and Earthquake Engineering》1999,18(5):1009

An interest in the behavior of liquefied sand during seismic flow failure led the authors to conduct shaking table tests in which an embedded pipe was pulled laterally and the required drag force was monitored. Test results showed that the amplitude of shaking acceleration affected the behavior of sand in both dry and water-saturated conditions. In dry sand, the induced inertia force decreased the shear strength and consequently the magnitude of the drag force. When the sand was saturated, a special consideration was made of the similitude of dilatancy between 1-G model tests and the in-situ situation. This goal was attained by employing very loose sand in model tests. The rate-dependency in which the drag force increased with the rate of pipe movement was focused on, leading to an apparently viscous behavior of sand. This is consistent with what several former studies reported.  相似文献