CRTSⅡ型水泥乳化沥青砂浆施工质量控制

Impacts Analysis of Gap and Construction Quality Control on CRTSⅡ Type Cement Asphalt Mortar

本文以京沪高速铁路和京津城际客运专线工程施工实践为基础,阐述了水泥乳化沥青砂浆层施工质量控制要点,对施工中常见病害进行了描述与原因分析,最后基于弹性地基梁理论与有限元方法,研究了砂浆层离缝对轨道结构受力和变形的影响。结果表明轨道板与水泥乳化沥青砂浆层之间的离缝将加剧轨道结构的变形,为了保证高速列车行车品质与轨道结构的耐久性,必须严格控制水泥乳化沥青砂浆的施工质量,防止灌浆时砂浆离缝的出现,并及时进行施工工艺调整与养护维修。

Based on the practical experience from the construction of Beijing-shanghai high-speed railway and beijing-tianjin intercity passenger dedicated line , the control points of construction quality of cement asphalt mortar are expounded. The common diseases in the construction are described and the causes of diseases are analyzed. Effects of gap between slab and cement asphalt mortar layer on the deformation and stress of track structure are studied on the base of elastic foundation beam theory and finite element method. The results show that the gap between slab and cement asphalt mortar layer has significance effect on the deformation of track structure. In order to guarantee the train running quality and durability of track, the construction quality of cement asphalt mortar must be control strictly, the gap between slab and cement asphalt mortar layer must be prevented and adjusting the construction technology and maintenance timely.