Railroad bed bearing strength in the period of thawing and methods of its enhancement

作     者：Andrey Petryaev Anastasia Morozova 

作者机构：St.Petersburg State University of TransportManagement and Technology of Construction Department 

出 版 物：《Research in Cold and Arid Regions》 (寒旱区科学（英文版）)

年 卷 期：2013年第5卷第5期

页      面：548-553页

核心收录：

学科分类：081401[工学-岩土工程] 08[工学] 0814[工学-土木工程] 

主　　题：beating capacity thawing layer , vibrodynamic load geosynthetic material 

摘      要：The practice of building and operating of railroad beds shows that the greatest attenuation of soils occurs in the spring, during their Iransifion from the frozen to thawed state. The geatest influences on the properties of clay soils that form the railway are from hydration, fieeze-thaw cycles and vibrodynamic impact of Wains. The increase in soil moisture is due to infillration of water into the ground, as well as the rise in water level due to soil redistribution during winter freezes. This can dramatically alter the basic characteristics of the soil, such as shear resistance and bulk density, on which strength and stability of soil mass depend primarily. Therefore, the degree of railway bed stability is not constant, but varies with time.