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在我国东北、西北和苏联远东的连续和岛状多年冻土地区,沼泽湿地是一种广泛分布的地貌类型。在这类地区修筑的铁路路堤,常常发生热融沉陷的问题。苏联远东铁路运输勘测设计院的调查资料表明,由于地基泥炭层的压缩性而使路堤的沉陷数值约占路堤沉陷量的80～85%。为了使新建铁路在交付运营之前,发生热融沉陷区段路堤的纵断面坡度,不得比
In continuous and island permafrost regions in northeastern and northwestern China and the Far East of the Soviet Union, marsh wetlands are a widely distributed landform type. Railway embankments built in such areas are often subject to thermal melting and thawing. According to the survey data from the Soviet Far East Railway Transport Survey and Design Institute, the subsidence value of the embankment accounts for about 80-85% of the embankment settlement due to the compressibility of the peat layer on the foundation. In order to make the longitudinal section gradient of the embankment in the section of thermal melting and thawing before the new railway is put into operation,