大型铁路站房项目混凝土原材质量管控与研究

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摘要:

大型铁路站房作为综合交通枢纽核心设施，具有结构体型庞大、荷载条件复杂、服役环境严苛等特点，混凝土结构的安全性与耐久性直接决定工程整体质量和使用寿命，而混凝土原材质量是保障结构性能的基础。本文以南京北站项目为依托，针对国标与铁标双重约束下原材料管控存在的指标差异大、溯源难度高、过程监管薄弱等难点，系统研究了原材料性能指标差异、选材与溯源机制、四级监管体系及储存环境控制四大关键环节。研究得出以下结论：一是铁标在碱含量、氯离子、含气量等关键耐久性指标上较国标更为严格，需建立差异化管理清单；二是通过构建“源头可溯、过程可控、责任可究”的选材与溯源机制，有效保障原材料质量稳定性；三是实施“搅拌站自检—项目部抽检—监理见证—业主飞检”四级联动监管体系，实现全过程闭环管控；四是强化温湿度、分区储存等环境保障措施，显著降低材料性能波动风险。研究形成的系统化管控策略可为同类大型交通枢纽工程混凝土原材料质量管理提供实践参考。

Abstract:

As core facilities of integrated transportation hubs, large railway station buildings exhibit characteristics such as massive structural size, complex loading conditions, and harsh service environments. The safety and durability of concrete structures directly determine the overall quality and service life of the project, and the quality of concrete raw materials is the foundation for ensuring structural performance. Based on the Nanjing North Railway Station project, this paper systematically studies four key aspects: differences in raw material performance indicators, material selection and traceability mechanisms, a four-level supervision system, and storage environment control, addressing challenges such as significant differences in indicators, high difficulty in tracing sources, and weak process supervision under the dual constraints of national and railway standards. The research draws the following conclusions: Firstly, the railway standards are stricter than the national standards in key durability indicators such as alkali content, chloride ion content, and air content, necessitating the establishment of a differentiated management checklist; secondly, by constructing a material selection and traceability mechanism that ensures "source traceability, process controllability, and accountability traceability," the quality stability of raw materials can be effectively guaranteed; thirdly, implementing a four-level linkage supervision system, namely "self-inspection by the mixing plant - spot inspection by the project department - supervision witness - unannounced inspection by the owner," achieves closed-loop control throughout the entire process; fourthly, strengthening environmental safeguards such as temperature and humidity control, and zoned storage significantly reduces the risk of material performance fluctuations. The systematic control strategies developed in this study provide practical references for the quality management of concrete raw materials in similar large-scale transportation hub projects. Keywords: raw material performance material traceability management four-tier supervision system storage management