A device for rainfall simulation in geotechnical centrifuges     

Wang  Shun  Idinger  Gregor 《Acta Geotechnica》2021,16(9):2887-2898

Rainfall-induced slope instabilities are ubiquitous in nature, but simulation of this type of hazards with centrifuge modelling still poses difficulties. In this paper, we introduce a rainfall device for initiating slope failure in a medium-sized centrifuge. This rainfall system is simple, robust and affordable. An array of perforated hoses is placed close above the model slope surface to generate the raindrops. The rainfall intensity depends on the centrifuge acceleration and the flow rate of the water supply, which is controlled by the size and number of the tiny pinholes in the hose walls. The rainfall intensities that are tested range from 2.5–30 mm/h, covering the intensity range of moderate, heavy and torrential rainfall events. Our model test with rainfall-induced slope failure shows that this system is capable of generating relatively uniform rainfall of wide intensities and leads to various patterns of slope failure.

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Centrifuge model test on the face stability of shallow tunnel   总被引：2，自引：2，他引：0  

Gregor Idinger  Pelin Aklik  Wei Wu  Ronaldo I. Borja 《Acta Geotechnica》2011,6(2):105-117

This paper is an investigation of face stability on a small-scale tunnel model in a geotechnical centrifuge. By making use of symmetry, half of the tunnel cross section was considered. The support at excavation face was provided by a piston, which was adjusted during flight. Some aspects on the collapse at tunnel face are investigated for different overburden pressures: failure mechanism, surface settlement, stress acting at tunnel face, and the required face support counteracting the earth pressure. Ground deformation was observed through a transparent wall and measured by digital image correlation. The results from centrifuge model tests were compared with theoretical models.  相似文献   

Centrifuge modelling of rainfall-induced slope failure in variably saturated soil     

Wang  Shun  Idinger  Gregor  Wu  Wei 《Acta Geotechnica》2021,16(9):2899-2916

Acta Geotechnica - This paper presents the results of centrifuge tests on rainfall-induced instabilities in variably saturated slopes. The roles of rainfall intensity and initial conditions, such...  相似文献