![]() Can Geotech J 47(7):742–762īoylan N, Gaudin C, White DJ et al (2010) Modelling of submarine slides in the geotechnical centrifuge. In Physical Modelling in Geotechnics, CRC Press, 489–493īowman ET, Laue JIB, Springman SM (2010) Experimental modelling of debris flow behaviour using a geotechnical centrifuge. It is necessary to pay close attention to the development of the cracks at the rear edge of the landslide and strengthen the prevention measures for landslide deformation instability and river blocking disasters.Īrcher A, Ng CWW (2018) A new environmental chamber for the HKUST centrifuge facility. At present, the JDY ancient landslide is still in a state of creeping deformation. The centrifugal simulation tests suggest that the factors for JDY ancient landslide reactivation are mainly affected by rainfall and pore water pressure, as well as the coupling of sliding caused by the erosion of the river front with the movement of the middle and rear parts of the landslide caused by rainfall. The deformation process of the landslide body is mainly divided into four stages: ① consolidation ② deformation initiation (crack formation stage) ③ deformation acceleration (crack acceleration development stage) and ④ instability. Under the river erosion influence of the slope toe, the cracks finally penetrate and cause landslide damage. Then, the cracks gradually expand to the front edge. The deformation starts from the middle and rear parts of the slope, and cracks are generated. The test analysis shows that the JDY ancient landslide demonstrates composite retrogressive sliding. However, when the water content is 15% and 20%, the landslide body is damaged, and the centrifugal acceleration required for slope instability is 100 g and 50 g, respectively. The tests show that when the water content is 10%, only a few cracks are generated in the middle and rear parts of the slope by the end of the test, but the landslide is still in a stable state overall. To study the reactivation mechanism of the JDY ancient landslide, based on field geological survey, the centrifuge simulation tests of the landslide body under 10%, 15%, and 20% water content conditions are carried out. Affected by fault activities, rainfall, river erosion, and human engineering activities, the JDY landslide has been repeatedly reactivated and blocked the Bailongjiang River, causing great disasters. The Jiangdingya (JDY) ancient landslide is a large-scale landslide located in the Bailongjiang River fault zone, Zhouqu County, Gansu Province. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |