Base Soil Reinforcement with Vertical Crushed Stone Columns in Cryolithozone

• Published in: World of Transport and Transportation
• Main Authors: T. V. Shepitko, I. A. Artyushenko, P. G. Dolgov, Т. В. Шепитько, И. А. Артюшенко, П. Г. Долгов
• Format: Article in Journal/Newspaper
• Language: Russian; English
• Published: Russian University of Transport (RUT) 2019
• Subjects: строительство; railways; roadbed; Northern Latitudinal Railway; permafrost soils; vertical columns of crushed stone; embankment stability; construction; civil engineering; железная дорога; земляное полотно; Северный широтный ход; многолетнемёрзлые грунты; вертикальные столбы из щебня; устойчивость насыпи; permafrost
• Online Access: https://mirtr.elpub.ru/jour/article/view/1707; https://doi.org/10.30932/1992-3252-2019-17-68-78

Stabilization of permafrost soils of the roadbed base, constructed with assumption of thawing, thanks to improvement of their strength characteristics, requires development and selection of rational structural and technological solutions. The objective of the study was to analyze the effectiveness of use of vertical columns of crushed stone in the permafrost zone and their influence on strength characteristics of the soil base. The study has used general scientific methods, modeling, simulation and comparative analysis. This article proposes a method for improving strength properties of soil of the roadbed base within Obskaya–Salekhard section of the Northern Latitudinal Railway thanks to reinforcement of the roadbed base made with vertical columns of crushed stone, which increases stability of the structure. The proposed basic technological model of construction of the roadbed includes the following main stages: preparatory stage, 1 stage – arrangement of vertical columns of crushed stone and granular subbases, 2 stage – additional compaction with a vibratory roller in case of mismatch of stability of bearing capacity and precipitation of the base to operating standards. The studied object of the transport infrastructure was simulated both without the use of technology for reinforcing it with vertical columns of crushed stone and with its use. The stability coefficient was calculated, and the theoretical surface of embankment collapse was obtained using Midas GTS NX and Plaxis 2D software packages. The stability test of this structure was carried out both in a flat and in a threedimensional setting. The efficiency of using vertical columns of crushed stone to strengthen the embankments constructed on permafrost soils has been shown. Стабилизация многолетнемёрзлых грунтов основания земляного полотна, сооружаемого с допущением оттаивания, за счёт улучшения их прочностных характеристик требует разработки и выбора рациональных конструктивно-технологических решений. Целью исследования является анализ эффективности ...