Dependence of physico-mechanical characteristics and safety factor of the soil mass on the spacing of vertical pillars of crushed stone

Abstract

In the design, construction and further operation of communication lines on permafrost soils, the most urgent task is to ensure the reliability of the foundation of the structure. The complexity of construction in the North is due to the presence of permafrost soils in the foundations of buildings, a large number of natural barriers, extreme climatic conditions and lack of infrastructure. In this regard, the choice of structural, technological and organizational solutions for the development of transport infrastructure, including for railways and, first of all, a deformability forecast, measures to ensure the stability of the soil base and the development of rational organizational schemes for their implementation, should be economically feasible, optimal or close to optimal for a particular engineering structure and the region of its location. To ensure stability and sustainability of the soil base of the structure on the Northern Latitudinal Railway section of the new Obskaya-Salekhard railway line, PK 01+50 – PK 06+50, the author proposes a solution to strengthen the base soil with vertical columns of crushed stone. This article shows the effect of vertical columns of crushed stone on the strength characteristics of permafrost soils of the base of the structure. The dependence of the strength characteristics of the soil base on the different steps of the placement of vertical columns of crushed stone is shown. The conclusion is drawn about the most optimal spacing step according to the results of calculations and comparison of various steps of arranging vertical pillars from crushed stone. The results presented in the article are part of the dissertation research I. Artyushenko «Reinforcement of the subgrade base with vertical columns of crushed stone in areas with permafrost soils».