عنوان مقاله [English]
Due to population growth and lack of space for construction, excavations are becoming more and more deep in the urban space. Studies have shown that in addition to soil mechanical properties, chemical properties also play a significant role in the stability of the excavation. This effect is more pronounced in fine-grained soils, where inter-particle chemical cementation results in greater cohesion to the soil and ultimately more stability to the soil. In this paper, the effect of soil chemical properties on stabilization of excavations is investigated, which is introduced as a new work. As a case study, excavation carried out on Modares Street in Kermanshah has been investigated. Also, using of Plexis software, the stability analysis of the excavation was performed using the physical and mechanical properties of the soil. The results of this analysis show that the maximum depth of excavation to stabilize the excavation, it is about 16 meters, while this excavation remained stable with a depth of 22 meters. Therefore, 6 m extra depth is related to the effect of soil chemical compounds, which is not applicable in physical analysis. The results show that if there is more knowledge about the effect of chemical compounds on the stability of the excavation, the depth of excavation can be considered more than the results of numerical analysis. Adding suitable chemical compounds to the soil of the project site, to stabilize the excavation wall, can be considered as a new method (compared to other methods such as nailing, anchorage, retaining wall).