请帮我翻译下论文摘要！先谢了！！

随着“四纵四横”高速铁路客运网骨架的逐步实施，我国高速铁路建设规模空前。由于高速铁路采用全封闭行车模式，线路平、纵断面参数要求轨道具有高平顺性，导致线路中桥梁的比例明显增大。在有泄洪、通航、通车（跨既有线）和跨越深谷等不能有支架施工的情况下，连续梁以其独特的优势被广泛采用。鉴于连续梁施工方法的独特性，加上高速铁路对桥梁整体性能、结构刚度、耐久性、成桥线性、行车平顺性等方面的严要求，真正达到“三高”标准，对高速铁路现浇连续梁施工技术进行研究是很有必要的。

目前，虽然连续梁施工中悬臂施工方法相对比较成熟，但鉴于高速铁路对连续梁施工质量要求十分严格，施工过程中需要解决的关键问题很多。如：如何更好地发挥高性能混凝土性能；如何避免温度变化、混凝土收缩徐变、地基不均匀沉降等的影响；如何保证合拢前两悬臂端竖向挠度的偏差和主梁轴线的横向偏移不超过容许范围；如何保证合拢后的桥面线形良好；如何避免施工中主梁截面出现过大的应力等。这些问题若处理不当，不仅会对结构受力不利，而且可能会使主梁梁底曲线不顺畅，形成永久性缺陷而影响外形美观。本文将结合京沪高速铁路石干特大桥（40m+72m+40m）连续梁的施工，针对以上关键问题提出质量控制措施，并对施工过程中采用的关键技术进行总结。

With the "four vertical and four horizontal" high-speed railway passenger transport network the gradual implementation of skeletons, China's high-speed railway construction on an unprecedented scale. As a fully enclosed high-speed railway traffic patterns, line level, vertical section parameters require a high smoothness of the track, leading to lines significantly increased the proportion of the bridge. In a flood, air and shipping traffic (across both lines) and across the deep valley and so can not have bracket construction case, the continuous beam with its unique advantages will be widely adopted. In view of the unique continuous beam construction method, coupled with the overall performance of high-speed railway bridges, structural stiffness, durability, into the bridge linear, driving comfort and other aspects of the strict requirements, truly achieve the "three high" standard for high-speed rail is now poured continuous beam construction technology research is necessary.

At present, although the continuous beam construction, cantilever construction method is relatively mature, but in view of high-speed railway construction for continuous beam quality requirements are very strict, the construction process, a lot of key issues need to be addressed. Such as: how to better play to high-performance concrete properties; how to avoid temperature changes, shrinkage and creep of concrete, foundation, uneven settlement and so on; how to ensure that close up before the end of the vertical deflection of the cantilever 2 and the main beam axis deviation of the lateral shift does not exceed the permissible range; how to ensure that folded after the bridge linear positive; how to avoid the construction of the main beam and so there have been a big stress. These problems, if not handled properly, not only will the structure Shouli Bu benefits, and may cause the main Liang Liang at the end of curve is not smooth, the formation of permanent defects affecting the aesthetic appearance. This paper will combine the dry stone Beijing-Shanghai High Speed Railway Bridge (40m +72 m +40 m) continuous beam construction, the key issues for the above quality control measures, and the construction process used in the summary of key technologies.