Study On Mechanism Of Landslide In Loess Area

With the implementation of the western development strategy, the construction of large and medium-sized projects emerge as the times require various. But because of the special geological features in the northwest, engineering problems in engineering construction is also emerge in an endless stream. The soil of northwest area is mountainous, hilly and Quaternary loess, loess landslide geomorphic, leading to problems in engineering is particularly serious.This article mainly from the Loess joints of loess landslide, mechanism of landslide research. As everyone knows the Loess joints are the important factors that influence the engineering properties of the. Understand the characteristics and joint shear strength of loess in the loess region soil moisture infiltration, is one of the basic work in the loess landslide and loess characteristics and related geotechnical engineering problems. Based on soil test be remolded and joint friction angle of intact loess after disturbance. Analysis of the Loess joint friction angle changes with the curve of water, when the water content reaches the limit water content, loess joint friction angle. When the moisture content is lower than the water content of loess friction angle increases with the water content increasing. When the moisture content is higher than the water content, loess joint friction angle increases with the water content increasing. When the moisture content is higher than the water content, loess joint friction angle increases with the increase of water content and decrease. The friction angle and its water content, density is closely related to.Joint analysis of different position on loess slope water into the qualitative effects of infiltration, effects of different angle of the joints on the Loess landslide. When no joint slope can be used as no damage model, to observe and analysis only in the weight and the other boundary conditions. When the joint is smaller, and the irrigation season up to the water blocking effect, to a certain role in promoting the slope safety. With the increasing of irrigation amount, joint played water, easy to form a weak plane in slope. Easily lead to the occurrence of landslide, combined with the winter temperature is low moisture into the joint, the frost heaving, cause harm aggravated.Based on the above research, consider the joint effects on loess landslide, the stability of loess slope was used for qualitative analysis and calculation of soil simulation model by using the nonlinear finite element software.