Numerical experimental study on the effect of excavation on the stability of loess slope

In order to obtain more land for construction of large excavation slope, steep slope leading to soil, surface increases, serious damage to the original balance of geological environment. It will create the conditions for the occurrence of landslides. It is found through research that there are three types of landslides caused by artificial excavation, including new landslide after chopping slope, old slope reactivation caused by chopping slope, and landslides caused by abandoned earthwork after excavation. Through numerical tests on the stability of the new slope, it is found that with the increase amount of excavation, the stability coefficient decreases, until destruction. The test reflects the change process of the stress state on the sliding surface of the slope. With the shear stress below the shear strength, the anti slide force decreases, the front of the landslide is first revived, the upper part loses support and the whole slide is a traction failure. (paper)