论文部分内容阅读
青藏公路整治改建中,按照保护冻土、控制融化速率的原则,绝大部分多年冻土地区的路基都被加高。随着路基高度的抬升,路基内相继出现了众多以纵向裂缝为主的病害。在大量实地调查研究的基础上,根据青藏公路纵向裂缝的发育规律,系统地分析青藏公路纵向裂缝与路基高度、走向和冻土特征之间的相互关系及其形成机理,认为青藏公路纵向裂缝主要与路基下融化盘偏移有关,另外还与冻土环境、施工质量等相关,并提出了治理青藏公路纵向裂缝的建议。
During the rebuilding of the Qinghai-Tibet Highway, in accordance with the principle of protecting frozen soil and controlling the rate of melting, the subgrade in most permafrost regions has been raised. With the rise of subgrade height, many submerged cracks have appeared in the subgrade. Based on a large number of field investigations and studies, based on the development of longitudinal cracks in the Qinghai-Tibet Highway, the relationship between the longitudinal cracks along the Qinghai-Tibet Highway and the embankment height and direction and the formation of the frozen soil is systematically analyzed. It is considered that the longitudinal cracks in the Qinghai- It is also related to the frozen soil environment and construction quality, and some suggestions are put forward to control longitudinal cracks in Qinghai-Tibet Highway.