青藏铁路耐久性混凝土施工工艺

研究目的：针对青藏铁路的地理位置处于青藏高原，自然环境非常恶劣，气象条件复杂多变，混凝土的耐久性要求很高的情况，为了确保混凝土施工质量，耐久性混凝土施工工艺进行研究。 研究方法：根据混凝土的耐久性要求，通过试验室试验和工程现场试验得出基本参数，通过工程应用验证其科学性。 研究结果：在青藏铁路施工中，严格按本文施工工艺施工，有效地控制了混凝土质量。 研究结论：耐久性混凝土施工要严格控制配合比的准确性，施工条件发生变化时要及时调整配合比。另外，对混凝土的振捣、养护要求也较普通混凝土严格。施工前要对施工人员进行培训，高标准、严要求。

Construction Technique for Durability Concrete for Qinghai- Tibet Railway

Research purposes: The durability of concrete was required of high quality because Qinghai-Tibet Railway is in Qinghai-Tibet Plateau with badly natural environment,and complicated and changeable meteorological conditions.It was necessary to make research on construction technique of durability concrete to ensure the construction quality of concrete.Research methods: According to the requirements for concrete durability,the basic parameters were obtained through doing lab experiments and site experiment,and their scientificalness were verified through the application in construction.Research results: Good result of concrete quality was obtained in construction of Qinghai-Tibet Railway because construction was conducted strictly according to the construction technique.Research conclusions: The accuracy of fit proportion would be controlled strictly in durability concrete construction,and the fit proportion would be adjusted when the construction conditions had changed.In addition,there was more strict requirement for vibration tamping and maintenance to durability concrete than that to ordinary concrete.The workers for construction would be trained with high standard and strict requirement before construction.